CONCHYLIA—/>/TJi yii^. 7. 31 



Shell transverse, equivalve, open at the sides. Hinge with a 

 single elevated transversely dilated tooth in the left valve, and 

 none in the right : lateral teeth none. Ligament internal. 



The shells of this genus are generally found buried in gravel 

 or hard clay, and are furnished with along contractile and exten- 

 sile tube of suction at the anterior end. 



Mta testa oblongd convexd, latere antico truncate, dente «iuiic»w- 

 rotundato simplici. 



Shell oblong convex, truncate at the anterior end, with the tooth 



rounded and simple. 



Myatruncata. Linn. Sy«t. Nat. p. 1112. 



Gmelin, Syst. p. 8217. 



Turton, Linn. Syst. iv. p. 174. 



Pennant, Brit. Zool. iv. p. 159, tab. 44. 



Chemnitz, vi. p. 8, tab. 1, fig. 1 and 2. 



Montagu, Test. Brit. p. 32. 



Donovan, British Shells, iii. tab. 92. 



Linn. Trans, viii. p. 35. 



Turton, British Fauna, p. 146. 



Dorset Catal. p. 27, tab. 3, fig. 1. 



Wood, Conch, p. 90, tab. 17, fig. 1 and 2. 

 Dillwyn, Descript. Catal. p. 42. 



Turton, Conch. Diet. p. 97. 

 Chama truncata. Da Costa, Br. Conch, p. 233, tab. 16, fig. 1. 

 Chaniae Pholas latus. Lister, Conch, tab. 428, fig. 269, 

 Mus. nost. Gravelly and muddy shores. 



