48 CONCUYLJ^—DITHYRA. l^ 



prseienuis. Anatina tesld deoressd ovatd, latere antico rotundato hiante, 



5 . 



deniibus ovato-protenus. 

 Sliell flat oval, rounded and open at the anterior side, with the 

 teeth oval and projecting. 



Tab. nost 4, fig. 4. 

 Mya. praetenuis. Pennant^ Br. Zool. iv. p. 160;, tab. 50, fig. 1. 

 Montagu, Test. Brit. p. 41. 

 Linn. Trans, viii. p. 37. 

 Turton, British Fauna, p. 147. 

 Donovan, British Shells, v. tab. 176. 

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

 Dorset Catal. tab. 4, fig. 7. 

 Turton, Conch. Diet. p. lOl. 

 Jhts, 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, 

 running at the anterior end into a rounded instead of a truncate 

 termination, where it is also less angular. 



distoita. Anatina testd convexd pohjmorphd subclausd, margine ple- 

 rumqiie sinuato, cochlearibus rotundato-protensis. 

 Shell convex variously shaped, nearly closed, with the margin 

 generally indented,, and; the teetb rounded and projecting 

 inwardst 



Tabi nos/; 4j fig^ 5i 

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

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

 Linn, TroMS. vili. p. 37. 



