48 



GO^GRYUA—DITHYRA. 14. 



])rsetenuis. 

 5. 



Anatina testa depressd ovatd, latere antico rotundato hiante, dentibus 



ovato-protensis. 

 Shell flat oval, rounded and open at the anterior side, with the teeth 

 oval and projecting. 



Tab. nost. 4, fig. 4. 

 Mya praetenuis. Pennant, Brit. Zool. iv. p. 160, tab. 50, fig. 1. 

 Montagu, Test. Brit. p. 41. 

 Linn. Trans, viii. p. 37. 

 Turton, British Fauna, p. 147. 

 Donovan, Brit. Shells, v. tab. 176. 

 Wood, Conch, p. 94, tab. 24. fig. 7 to 9. 

 Dorset Catal. tab. 4, fig, 7. 

 Turton, Conch. Diet. p. 101. 

 Mus. nost. Dredged up in Torbay. 



Shell an inch long, and an inch and a half broad : distinguished 

 from the last species, the Anatina declivis, by the oval-shape, run- 

 ning at the anterior end into a rounded instead of a truncate ter- 

 mination, where it is also less angular. 



distort a. 

 6. 



Anatina testa convexd polymorphd subclausd, margine plerumque 



sinuato, cochlearibus rotundato-protensis. 

 Shell convex variously shaped, nearly closed, with the margin gene- 

 rally indented, and the teeth rounded and projecting inwards. 

 Tab nost. 4. fig. 5. 

 Mya distorta Montagu, Test. Brit. p. 42, tab. 1, fig. 1. 



Pennant, Brit. Zool. iv. p. 161. 

 Linn. Trans, viii. p. 37. 



