Report on the zoological collections made in the Indo-Pacific Ocean ...

MOLLUSC A. 51and appears to correspond with Kiener's idea of the Lamarckianshell (Coq. Viv. fol. 34, f. 81) and also with the specimen figured byKiister (Con.-Cab. pi. 23. f. 5). But whether all or none of thesefigures delineate the true P. undata appears to me questionable.However, I do not believe that the West-Indian shell which hasbeen assigned to it by d'Orbigny (Eamon de la Sagra's Hist. Cuba,vol. ii. p. 145) and those figured by Tryon (Man. Couch, f. 82, 100103, and 109) can beyond a doubt be considered Lamarck's sj)ecies.The dimensions he gives, namely 22 lines in length, exceed thoseof the West-Indian examples; nor does the description of the colour," albo et fusco-nigricante longitudinaliter undatimque picta,'' applywell to those shells, but admirably suits the specimens figured byKiister, Reeve, and Kiener. The locality, " Monte Christi, WestColumbia,'' given by Reeve for his shell is no doubt erroneous, andapplies to two others on the same tablet, considered by Cuming thesame species, but which on careful examination prove to be withoutdoubt examples of P. biserialis, Elainville { = P. bicostalis. Reeve,? of Lamarck). This species has a character not found in P. hituhercularisand its varieties, namely the oblique plications on thelower part of the columella ; and P. fasciata of Reeve, which is alsoconspecific with P. undata^ d'Orb. (non Lamk.), and P. forbesii,Dunker, also has on the columella a distinguishing character whichhas not been noticed, viz. a small brown stain, most observable infresh specimens, at the inferior end, and an oblique mark of thesame colour in a line with the raised ridge at the base of the bodywhorl.85. Purpura (Cronia) amygdala.Purpura amygdala, Kiener, Coq. Viv. p. 39, pi. 10. fig. 26 ;Chenu,Man. de Conch, fig. 807.Buccinum amygdala, Reeve, Conch. Icon. fig. 60.Hah. Port Denison, 4 fms. {Coppinger) ; Home Islands, off CapeGrenville, N.E. Australia, also Moretou Bay, Port Jackson, andPort Darwin (Brazier).The operculum of this species is normally Purpuroid, althoughthe basal channel of the aperture is unusually narrower than in thegenus.36. Sistrum undatum, var.Ricinula fiscellum, Reeve (non Chenmitz), Conch. Icon. pi. 4. fig. 28.Hah. Port Darwin {Coppinger) ; Port Essington (Jiil-es in Brit.Mus.).This variety is ulso (juoted from the north coast of Australia byG. and H. Xevill (Journ. Asiatic Soc. Bengal, 1875, vol. xliv, pt. 2,p. 83). It differs from the typical form of this well-known s])eciesin its greater bi'eadth, in having fewer and larger nodose plications,and in the fineness and closeness of the transverse squamoseridges.E 2