CONCH YLI A— I>///iF/i^. 14 201 



MoDioLA testd ovatd ventricosd, antice sttbacaminafd, umbo- J'scois. 

 iriltns lerminalihus suhconvolutis, extremitatihus longitudi- 

 ualiter costulalis. 

 Slioll oval very tumid, rather pointed at the anterior side, beaks 

 terminal and somewhat convolute, and slightly ribbed longi- 

 tiidinally at both ends. 



Tab. nost. 15, fig 4. 

 Mytilus Discors, Linn. Syst. Nat. p. 1159. 

 Gmelin, Syst. p. 3356. 

 Turton, Linn. Syst. iv. p. 294. 

 Chemnitz, viii. p. 191, tab. 86, fig. 764, 765. 

 Da Costa, p. 221, tab. 17, fig. 1. 

 Montagu, Test. Brit. p. 167. 

 Pennant, Brit. Zool. iv. p. 240. 

 hinn. Trans, viii. p. HI, tab. 3, fig. S. 

 Turton, British Fauna, p. 164. 

 Dorset Catal. p. 40, tab. 2, fig. 1. 

 Dil/wyn, Descript. Catal. p. 319. 

 Turton, Conch. Diet. p. 112. 

 Walker, Test, minut. p. 22, (ig. 79. 

 Mus. nost. Western coasts and Ireland. 



Shell hardly an inch long, green or brownish horn-color, often 

 potted, semitransparent, a little constricted at the margin to- 

 wards the pointed end, and divided into three compartments ; 

 the extremity at the beaks marked with about sixteen longitu- 

 dinal ribs, and the opposite or pointed extremity witli numerous 

 similar ribs, with the middle part between tiiese ribs slightly 

 striate transversely : beaks quite terminal, very obtuse, and 

 twisted into a single flat volution. 



2d 



