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648 R. C. PUNXETT.The racemose organ is always well-marked and in the larger specimens is usually somewhatlobulated.Collar. The cavity in the anterior part of the collar is usually spacious though notquite to the same extent as in Pt. parva. The dorsal septum is usually complete afterthe first root. The ventral septum may be entirely absent or, equally as often, it may befound in the hinder part of the collar. The number of proboscis roots varies from threeup to as many as six. The collar nerve cord usually has a distinct and continuous lumenwhich may rarely shew a tendency to become obliterated. The length of the comua ofthe nuchal skeleton is subject to a good deal of variation. It averages a trifle less thana quarter of the collar length.Trunk. In the branchial region the number of synapticula varies with the size of theanimal. The branchial region averages rather more than double the length of the collar(p. 665, Table 8). The post-branchial groove is well-developed, its length being about one-fifthof that of the branchial region. At its anterior level the genital folds are still of considerablesize (PI. XLVI. fig. 49). At the end of the post-branchial groove the folds havebecome much reduced (PL XLVI. fig. .51). The branchial portion of the oesophagus issomewhat smaller in section than the cesophageal portion (PL XLVI. fig. 57). A pj-gochordis present in the caudal region.Ptychodera flava, var. maldivensis (PL XXXIX. fig. 27).Locality, etc. From Maradu, Addu Atoll, where it was taken from sandy holes of thereef-flat. Fairly abundant. Two specimens also obtained from Hulule, on the east reefunderneath the stones of the boulder zone in sand.External features. In general shape and appearance this variety is indistinguishablefi'om laccadivensis to which it is very closely allied. Moreover the coloration in life wassimilar, this variety, like laccadivensis, shewing differentiation of the hepatic caeca into ananterior dark gi-oup and a posterior larger and lighter group.Internal structure. Exceedingly similar to that of laccadivensis from which varietyhowever the present one would seem to diifer on the following points. The proboscis cavityhas a definite outline as in parva (cf. PL XLIII. fig. 21) and does not reach up amongthe radial muscle bundles as in laccadivensis (cf. PL XXXIX. fig. 25).The racemose organ is on the whole somewhat smaller.The dorsal roots are less numerous, a feature in which this variety resembles cooperi.The cornua of the nuchal skeleton are relatively shorter than in laccadivensis.The branchial portion of the cesophagus is as large or larger than the ventral portion,whilst in laccadivensis it is always smaller.The branchial region is relatively shorter than in laccadivensis, averaging only r63 timesthe collar length as against 2'26 times in the latter variety, a difference which is the morestriking when one takes into account the comparatively large number of specimens examined(see below, p. 665, Table 8).The post-branchial groove of maldivensis isalso somewhat shorter than that of laccadivensis.In point of size the present variety is considerably smaller than laccadivensis, preservedspecimens of which may be as much as 150 mm. in length, whilst the largest specimen of
the enteropneusta.649Table 3.Pt. fiava, var. scudcola.vai'.maldivensis.No. of specimen(1)(2)(3)(4)(1)(2)Proboscis coelomSpaciousNot largeFaii'ly largeas (3)Fairly welldevelojiedand withdefiniteoutlineas(l)Collar coelomSpaciousSomewhatoccluded byconnectivetissueSpaciousSpaciousVeryspaciousas (1)Ventral proboscis septumNearly totip ofstomochordas (1)as(l)as (1)Nearly totip ofstomochordNot nearlyto tip ofstomochordDorso-ventral proboscis musclesPresentTracesas (2)AbsentPresentas (1)Dorsal collar septumCommencesjust anteriorto 1st rootCommences'5 mm. behind1st rootCompleteafter 1st rootas (3)Completeafter 2ndrootCompleteafter 1st rootVentral collar septumComplete inhinder partof collaras(l)Present inhinder partof collar butnot completeas (1)Absentas(l)Racemose organWell markedbut small andunlobulatedWell markedandlobulatedWell markedand slightlylobulatedDistinct butnot lobulatedSmall andunlobulatedas(l)Dorsal proboscis muscle decussationDistinctStrong. Alsoa few ventralcircularfibresWell marked.A few ventralcircularfibresStrong butno ventralcircularfibresNoFeeble.ventral circularfibresas(l)Dorsal roots*RRri-RrRRRRRRrRProboscis pores*LrLRIRLRLrIRNerve cord ....Length of post-branchial grooveLength of branchial regionLumen withtendency toobliterationin middlepart•43Lumen withmarked tendencytoobliterationLumencontinuous•22Lumen withslight tendencytoobliteration•25Lumencontinuous.Slight tendencytoobliterationposteriorly•16Lumencontinuous•IfiLength of comua x 100Length of collar17-110-119-415^08^4Circumference of branchial oes.Circumference of tesoph.ces.•33"5•38roiSynapticiilaLength of branchial regionLength of collarNot morethan 595Not morethan 61-25Up to 9116Not morethan 3•921^34TTO* See foot-note on p. i'Ao.
Page 7 and 8:
The Fauna and Geographyof theMaldiv
Page 9 and 10:
The Fauna and Geographyof theMaldiv
Page 11:
CONTENTS OF VOL. II.PAKT II.Reports
Page 14 and 15:
..590 EDGAR A. SMITH.60at3aso-73a
Page 16 and 17:
—592 EDGAR A. SMITH.3 SC3dSaitnhe
Page 18 and 19:
,594 EDGAR A. SMITH.3-a ao5j,Moss3
Page 20 and 21:
.596 EDGAR A. SMITH.3oa o"?!00 >iId
Page 22 and 23:
598 EDGAR A. SMITH.3isaa'a
Page 24 and 25:
600 EDGAR A. SMITH.Family ACTAEONID
Page 26 and 27: 602 EDGAR A. SMITH.23. Conus lividu
Page 28 and 29: 604 EDGAR A. SMITH,59. Harpa ventri
Page 30 and 31: 606 EDGAR A. SMITH.Family BUCCINIDA
Page 32 and 33: 608 EDGAE A. SMITH.below the suture
Page 34 and 35: 610 EDGAB, A. SMITH.135. Sistrum bi
Page 36 and 37: 612 EDGAR A. SMITH.173. Cypraea cla
Page 38 and 39: 614 EDGAR A. SMITH.211. Triforis gr
Page 40 and 41: 616 EDUAK. A. SMITH.which is a para
Page 42 and 43: . 270.618 EDGAE A. SMITH.265. Clanc
Page 44 and 45: 620 EDGAR A. SMITH.the shell being
Page 46 and 47: 622 EDGAE A. SMITH.slender riblets
Page 48 and 49: 624 EDGAR A. SMITH.330. Area (Barba
Page 50 and 51: 626 EDGAR A. SMITH.FamilyPETRICOLID
Page 52 and 53: 628 EDGAR A. SMITH.9. Chemnitz. Con
Page 54 and 55: 630 EDGAR A. SMITH.Fig. 22. Natica
Page 57: Plate XXXVI.mii>>-*"^-^ii,.•^16./
Page 60 and 61: 632 B. C. PUNNETT.Willeyia hisulcat
Page 62 and 63: 634 R. C. PUNNETT.No. of Specimen.(
Page 64 and 65: 636 R. C. PUNNETT.Internal structub
Page 66 and 67: 638 R. C. PUNNETT.The nuchal skelet
Page 68 and 69: 640 R. C. PUNNETT.deeply sunk posit
Page 70 and 71: 642 E. C. PUNNETT,but no giant cell
Page 72 and 73: 644 R. C. PUNNETT.Ptychodera flava,
Page 74 and 75: 646 R. C. PUNNETT.(PI. XLVI. fig. 4
Page 78 and 79: 650 E. C. PUXXETT.vialdivensis proc
Page 80 and 81: 652 R. C. PUNNETT.Collar. The muscu
Page 82 and 83: 654 R. C. PUNNETT.Table 5.Pt. flava
Page 84 and 85: 656 R. C. PUNNETT.whilst the oesoph
Page 86 and 87: 658 R. C. PUNNETT.is always complet
Page 88 and 89: 660 R. C. PUNNETT.Lastly there is a
Page 90 and 91: 662 R. C. PUNNETT.apparently devoid
Page 92 and 93: 664 R. C. PUNXETT.— '^^S*-!^^- Me
Page 94 and 95: 666 R. C. PUNNETT.-Scr.— tu« HJ=
Page 96 and 97: 668 E. C. PUNNETT.I ha\-e therefore
Page 98 and 99: 670 K. C. PUNNETT.gonad spells incr
Page 100 and 101: 672 R. C. PUNNETT.Table 11(continue
Page 102 and 103: 674 R. C. PUNNETT.Table 13.Pt. flav
Page 104 and 105: 676 R. C. PUNNETT.nlc.
Page 106 and 107: 678 R. C. PUNNETT.Pig. 37. Ft. flav
Page 108 and 109: 680 R. C. PUNNETT.PLATE XLV.Fig. 42
Page 111: Fa-UTia and Geography Maldives and
Page 115: 'Fauna and Geography Maldives aiid
Page 119: Fauna and Geography, Maldives and L
Page 123: Fauna and Geography, Maldives and L
Page 127:
Fauna and Geography, Maldives and L
Page 130 and 131:
(582 L. A. BORRADAILE.typical membe
Page 132 and 133:
684 L. A. BORRADAILE.arrangement is
Page 134 and 135:
:686 L. A. BORRADAILE.Subfamily Aca
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688 L- A. BORRADAILE.gaping. The sp
Page 138 and 139:
:690 L. A. BORRADAILE.26. Lambrus (
Page 140 and 141:
692 L. A. BORRADAILE.(12) The third
Page 142 and 143:
694 L. A. BORRADAILE.macrurous grou
Page 144 and 145:
:696 L. A. BORRADAILE.the whole, ho
Page 146 and 147:
698 L. A. BORRADAILE.2. 6th alxloni
Page 149:
Fauna and Geography, Maldives and L
Page 156 and 157:
7. Lepidoptera ... .;...... 123Volu
Page 158:
It was supposed that the whole work
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