106 AMERICAN JOURNAL 



Type. Terehratulina caput serpentis. L. sp. 



Anomia caput serpentis, Linn., Syst. Nat. ed. 12, 1153, 1767". 

 Terthratulina caput serpentis, D'Orb., Ann. Sci. Nat. viii, 67, 



pi. vii, fig. 7, 8, 17, 1848. 

 Terehratulina cornea, D'Orb., 1848. 

 Terehratula pubescetis, Retz., N. Gen. 15. 

 Anomia retusa, Linn., S. N. 12, p. 1151. 

 Delthyris spatula, Mke., Syn. ed. 2, 96. 

 Terehratula aurita, Flem., Phil. Zool. 

 Terehratula costata, Lowe, Zool. Journ. 

 Terehratula striata. Leach, Br. Moll. 

 Terehratula Gervillei, S. Wood, Mag. N. H. v, p. 253. 



Hah. North and East Atlantic. Smithsonian Cabinet, 14, 187. 



Fig. 4. 



Fig. 3. TerebratuUna caputserpcniis, D'Orb., hasmal valve. 

 Fig. 4. Same, showing the animal. 



This species, by the coarser and rougher stride, and usually 

 more elongate and less inflated valves, seems sufiiciently distin- 

 guished from T. septent7'ionalis. Couth. 



It is reported from Japan, by A. Adams. Perhaps his speci- 

 mens may have been T. augusta, Ad. {= T. Japonica^ Sby. 

 teste Rve.), or possibly Terehratula unguicula, Cpr. 



The other recent species of this genus are : 



Terehratulina Japonica, Sby., Thes. Conch, vii, p. 344, pi. 68, 

 fig. 7, 8. Hab. Japan. 



? Terehratulina Cumingii, Dav., P. Z. S. 1852, p. 79, pi. xiv, 

 fig. 17, 18, 19. Hab. China Seas, Japan. 



Terehratulina ahyssicola. Ad. and Rve., Voy. Samarang, Moll, 

 p. 72, pi. xxi, fig. 5. Hab. Gulf of Corea. 



Terehratulina radiata, Rve., Conch. Icon. pi. iii, fig. 7 a, 7 b. 

 Hab. Gulf of Corea, Belcher. 



Terehratulina cancellata, Koch, Kuster Conchyl. Cab. v, vii, 

 pi. ii b, fig. 11 and 15. Hab., West Australia, Suess. 



Terehratulina Caillettii, Crosse, Journ. de Conchyl. 1865, p. 

 27, pi. i, fig. 1, 2, 3. Hab. West Indies. 



