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646 R. C. PUNNETT.(PI. XLVI. fig. 48), springing from low clown. The branchial division of the oesophagus issomewhat more capacious than the ventral division of the oesophagus. The number ofsynapticula on the longest gill bars is either 7 or 8.Ptychodera flava, var. laccadivensis (PI. XXXIX. fig. 2.5; PI. XL. figs. 36, 38—40;PL XLV. fig. 43; PL XLVI. figs. 49, 51, 57).Locality, etc. Minikoi ; from lagoon close to edge of lagoon flat. It occurred in 4feet of water at low spring tides and was very abundant. The following notes were madeby Mr Gardiner."A few points about them are of interest, viz. (a) The tail part of the body, i.e.posterior ^, is merely a bag of sand and is often broken off if the animal be held stillby the head end. Under these circumstances the sand appears to be driven back by peristalticmovements of the whole body-wall more rapidly than it can escape, and as a resultthe posterior end simply breaks off. This I have verified by repeated observations underwater and I believe that it occiirs in life. (b) In distribution they are limited to theweed and to an area close to the edge of the flat, (c) Their natural position when aliveis within 4 inches of the surface of the sand. The head is close to the surface whilstthe body and tail are horizontal, (d) When thrown on to a sandy bottom the motion isvery feeble or nil if the body be full of sand. The posterior part is at once dehisced. Awriggling motion of the branchial and genital regions ensues, accompanied by powerful contractionsof the collar and extensions of the j)i'oboscis. The jjroboscis and collar' are veryslowly forced into the sand and then the body follows with comparative rapidity."External features. This variety shews a great resemblance to Pt. flava, var. caledoniensis(Willey, '99, p. 228) in general appearance. The largest complete specimens whichreached me are about 150 mm. in length, but fragments of larger specimens point to itsattaining a somewhat greater size. The proboscis is of about the same length as the collaror slightly longer. The anterior liver saccules are dark, the posterior lighter in colour. Thelarger liver saccules are lobulated along one edge, such lobulation being most marked inthe larger specimens. The length of the branchial and post-branchial genital regions aredealt with later (p. 663) in connection with variation in the grouf). The colour of theanimal in life was bright yellow or pale lemon, thus differing somewhat from Pt. caledoniensis,which is of a duller hue inclining to brownish.Internal .structure.Proboscis. Just beneath the basement-membrane occur a few delicate circular fibressurrounding the longitudinal muscles which are gathered up into radial bundles. Thesebundles project into the proboscis coelom, which has no well-defined boundary (PL XXXIX.fig. 25). Dorso-ventral muscles are usually to be found in the i-egion of the central complex.The ventral proboscis septum extends forwards as far as the tip of the stomochord. Thedecussation of muscle fibres on the dorsal side of the anterior portion of the proboscis iswell-marked as a rule, and a few circular fibres may be continued from it round the inneredge of the longitudinal muscles on the ventral surface of the proboscis cavity. The probosciscoelom of both sides may be placed in communication with the exterior by the two proboscispores. It as often happens however that the communication between the proboscis coelom'In Dolichoglossus pusilliis, whose movements form the subject of a paper by Kitter ('02), the proboscis appearsto play a relatively more important part.
THE ENTEROPXEUSTA. 64;and tile end vesicle opening by the proboscis pore is lacking. Sometimes this occurs onone side and sometimes on the other.Table 2.Ft, flava, var. laccadivensis.No. of specimen
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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 76 and 77: 648 R. C. PUNXETT.The racemose orga
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
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Fauna and Geography, Maldives and L
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(582 L. A. BORRADAILE.typical membe
Page 132 and 133:
684 L. A. BORRADAILE.arrangement is
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: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
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694 L. A. BORRADAILE.macrurous grou
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: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
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7. Lepidoptera ... .;...... 123Volu
Page 158:
It was supposed that the whole work
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