82 



closely allied. It may eventually prove to be a mere variety of that shell. The 

 absence of a posterior accessory plate prevents this species from being placed 

 in the genus Pholas, where it is nearly allied to P. truncata. 



B. Erythraea, Gray. 



Barnia Erythraea, Gray, Ann. and Mag. Nat. Hist. 2d ser. viii. p. 382, 1851, 



Barnea E r y t h r ae a, H. and A. Adams, Genera, ii. p. 326. 



Hah.— Red Sea. 



This shell, which has not yet been figured, seems to be allied to B. s i m i 1 i s, 

 but is probably distinct. 



B. s i m i 1 i s, Gray. (Sp.) 



Pholas simil is, Gray, in Yates' New Zealand. Catlow, Gonch. Nomenc. p. 4. 

 Jay, Cat. 4th edit. p. 10. Sowerby, Monog. Pholas, Thes. Conch, ii. p, 

 487, t. 103, f. 12— 14. 

 Barnia s i m i I i s, Gray, Ann. and Mag. Nat. Hist. 2d ser. viii . p. 382. 

 Barnea s i m i 1 i s, H. and A. Adams, Genera, ii. p. 326. Fischer, Journ. CorcIi. 

 2d ser. iii. p. 49. 

 Pholas anlipodum, Philippi, Zeitschr. fur Malak. p. 71, 1847. 



" antipodarum, Philippi. Gray, Ann. and Mag. N. Hist. 2d ser. viii. p. 382. 

 1851. 

 JIab.— New Zealand. 

 Coll. Acad. Nat. Sciences. Coll. J. C. Jay, M. D. Coll. G. W. Tryon, Jr. 



Genus Navea, Gray. 

 Navea, Gray, Ann. and Mag. Nat. Hist. 2d ser. viii. p. 385. 

 N. n u c i f e r a, Fabricius (sp.) 

 Pholas nucifera, Fabricius. Spengler, Skrivfc.Nat. iv. p. 40, t. 10, f. 4, 9. 



Fischer, Journ. Conch. 2d ser. iii. p. 50. 

 Navea nucifera, Gray, Ann. and Mag. Nat. Hist. 2d ser. viii. p. 385. H. and 

 A. Adams, Genera, ii. p. 328. Morch, Cat. p. 2. 

 According to Dr. Gray, resembling tenuis, but appears to be shorter in 

 front and looger and more rounded behind. 



N. subglobosa, Gray. 



Navea subglobosa, Gray, Ann. and Mag. Nat. Hist. 2d ser. viii. p. 385, 



1851. Chenu, Man. Conchyl. ii. f. 28,29. H. and A. Adams, Genera. 



iii. t. 89, f. 6, 6, a, 6, b. Fischer, Journ. Conchyl. 2d ser. iii. p. 50. 

 Eab. — California. 



N.- te nui s, Gray. 



Navea tenuis, Gray, Ann. and Mag. Nat. Hist. 2d ser. viii. p. 385, 1851. H. 



and A. Adams, Genera, ii. p. 328. Fischer, Journ. Conchyl. 2d ser. 



iii. p. 50. 

 Hab.— ? 



Genus Zirph.ea, Leach. 

 Zirph;ea, Leach. H. and A. Adams, Genera, ii. 



Zirfaa, Leach. Gray, Ann. and Mag. Nat. Hist. 2d ser. viii. p. 385, 1851. 

 Z. constrict a, Sowerby (sp.) 

 Pholas contricta, Sowerby, Proc. Zool. Soc. p. 161, 1849. Sowerby, Monog. 



Pholas, Thes. Conch, ii. p. 489, t. 104, f. 27, 28. 

 Zirphrea constrict a, H. and A. Adams, Genera, ii. p. 327. Fischer, Journ. 



Conch. 2d ser. iii. p. 50. 

 Zirpbaaa con strict a, Gray, Ann. and Mag. N. H. 2d ser. viii. p. 385, 1851. 

 Ilab. — Straits of Sunda. 



