57 



different angle of divergence, and the difference of tlic plate distinguish this shell 

 from Puncturella Coo[)eri Carpenter (Desc. of new marine shells fnmi California, 

 Proceedings of the Ca. Acad, of Nat. sc. v. 3.i. 



Liinopsis aurita Brocchi. PI. VI fig. 27. 



(Conch, foss, Subapenn. p. 48.5, pi. 11, f. 9. as Area.— Defrance, Diet. 

 Scient. pi. 39, p. 224.— Goldfuss, Petrefacta German, v. 2, p. 1G3, \A. 126, 

 f. 14.— Philippi, Ennm. Moll. Sic. v. 1, p. 63, and v. 2, p. 45. All these 

 authors apply the generic name of Pectnncnlus — S. Wood, Crag-Moll. 

 II, p. 70, pi. 9, f. 2 and Snp])!. p. 117.— Jeffreys, brit. Conch, v. 2, 

 p. 161.). 



This species, as far as I hnow. has never been fmind living in the Pacific 

 Ocean or in its bays, nor in the East-Indian Sea, anrl even the genns seems to 

 Ix; wanting except in the very remotest corner of this part of the ocean, in the 

 Red Sea. The shells, not rare at Shinagawa, are easily distinguished from Pe- 

 ctunculus by their sharp and smooth margin. Besides, they are mostly more 

 oblique, and their ribs are a little sharper. The cajicellated sm-face, on which the 

 radiating ril)S prevail, is exactly the same as in the Eumpean fossil specimens, 

 and the only difference which could be found is the number of teeth which 

 according to Jeffreys is about a dozen. This does not correspond to the Shina- 

 gawa specimens which are partly large, reaching 17 nnn. in height and 18 in 

 length, and mostly very well preserved. They have never less than 14 teeth 

 and often IS, or 9 on each side of tin; cartilage pit, and in a few instances, cme — 

 or in the posterior side even 2 — may be added. But all the figures and Wood's 

 description prove to a certainty that the normal nundier of teeth is indeed 18, 

 and that a smaller number indicates either an obliteration or an imperfect stage 

 of development. The vertical range of the species is comparatively great, as it 

 is found in the Falun-like miocene deposits of North-Germany as well as in the 

 Subapennine formation. It is also found in the crag and is said to occur in tJie 

 glacial beds (where it may be derivative). Jell'reys and others say tiiat it still 

 exists near the northwestern coast of Britain. 



Pecten laetus Gould. 



(Otia concbol. p. J77 — CarjHsnter, Rep. II, p. r)87; Cuming and Idschke, 

 V. i., exclude, liowever, the specimens from New .Zealand, menlioneil by 

 G<juld 1. c. p. 95 and figured in At), of Moll, of Wilke's Expl. pi. 42, f. 

 571; they unite the latter to P. Dieffenbacliii Gray.— Lischke, Japan. 

 Meeres-Conch. V. I, p. J(;9, pi. 12, f. 6 and 7; vol. 2. p. 157.1. 



Omitting, in tliis case also, a critical investigation whether the si>ocie8 is 

 reallv good or not, I identify tlic shells from Sliinagawa witli it and particularly 

 with Lischkc's figure C i. c. 1 liey are few in number, mostly broken. One is 

 entire but smaller than the mentioned lig\ne; it has JO strong rilis willi foliated 

 projection.s, and the number of the intermediate ril a is mostly 3, sometimes 4 



