39 



The shell wliich occurs frequently near the coasts of Sachaliu an<l 

 Yesso. lias an clongateil, nearly eriuilateial outline ami a nearly straight ujnnr 

 marj^in. The projiortion of length and height is given as lOi) to 7") in the 

 elongateJ varieties. A great many small shells agree perfectly in cmfline with 

 the latter, ami -moreover show a perfect iilentity of the hin^e with its rather 

 straight line ami its two dujilicatcd lateral teeth. I omit the discussion whether 

 M. si)ectabilis Listhke (1. c. v. 2. p. 120. pi. 11, f. 1 and 2) whose height is said 

 to be about 0.7'J "f the length, and wliose hinge is e.xactly the same, is not 

 merely a very lari^e variety of M. Sachalineusis. 



Tellinn Ytddoensis Lischke. 

 (Japan. Jlecres-Conch. v. 3, p. 02. t. 9. f 1.3 I 



From all the other small Teliin;u this species, somewhat ineiiuilateral, 

 shorter and a little pointed behind, with fold, with hinge-teeth and lateral teeth 

 in the right valve, is sutRciently distinguished by the last character. (Cf. 

 Lischke.) It is not very freipient at Oji. 



Telliiia n'didula Dunker. 

 (Malakozool. Bl. Vol. (!. p. 23G, Moll. .Jai.on. p. 27, pi, 3. f. 14.-Lischko, 

 Ja|>an. Meeres-Conch. v. 1, p. 129, v. 2. p 113. pi. 10. f. 10 and 111 



This si)ecies, which is also not very abundantly found at Oji, seems to be 

 separated into many species by Martens, Lischke &c. without sutlicient reason, 

 and really to ba somewhat variable in outline and jiropurtions. The absence of 

 posterior lateral teeth distinguishes it from the foregoing, the outline and the 

 jiresence <>f an anterior (sni.ill) lateral tooth in tlu> right valve fni)n the following 

 species. 



TelliiHi nnsvtn Conmd. PI. IV, f 18. 



(.Journal of Acad. Nat. Sc. Thilad. Vol. 7. pt. 2d, 1S37, p. 238.-Sowerby, 

 Thes. Conch., Vol. 1, ].. 314, pi. (;4. f. 224.-Reeve, Icon. Conch. 

 Teliina, jil. 9, f. 40.— Lischke, Jap. Meeres-Conch. v. 2, p. 11"). pi. 10, f. 

 15-17.), 



There being no d<mbt left about the majority of Telliuiu found at Oji 

 belonging to this rather inequilateral, strongly folded, posteriorly short, 

 {Kiinted and arcuated S|iecies, I omit a fnrlher discussion on it and on its 

 synonymy, stating only that it belongs to the must frequent shells of that 

 locality and constitutes a considerable portion of the shell-layer. 



Tap.g ri'iulus Gould. PI. V, f. 19. 

 (Otia Conch, p. 85.— Moll, of Wilkes exploring E.\p. pi. ;'.7, f 53s. |, 



Gould's diagnosis SJiys : sliell solid, tmnsverse, ovate and ventri-osc, inequi- 

 lateral, covered with concentrical laminated lines nnd radiating broad Btriiv, both 

 of wliicli together leave, in the anterior part of the shell, only deep points, whilst 



