CONCHYLIA— I>/r//li?^ 41. ISl 



Montagu, Test. Brit. p. 77. 



Linn. Trans, viii. p. 62. 



Turton, British Fauna, p. 152. 



Wood, Conch, p. 207, tab. ol, fig. 1. 



Dillwyn, Descript. Catal. p. 115. 



Tuitun, Conch. Diet. p. 28. 

 Chemnitz, vi. p. 161, tab. 15, tig. 155, 156, 

 Cardiuni spinosum. Sowerby, Brit. Miscel]. tab. 32. Younger. 

 Pectunculus magnus. Lister, Conch, tab. 321, fig. 158. 

 Mus. nost. On the western coasts. 



Shell nearly four inches broad, very tumid, light in comparison 

 with its size, with about 21 ribs ; tliose on the cartilage side 

 clothed with a row of long sharp spines, which are lancet-shaped 

 in the half grown and young shells, and round in the aged ones; 

 those on the opposite side furnished with rather flattened obtuse 

 tubercles ; the grooves between them closely and regularly 

 striate transversely, but these stria; do not extend across the ribs : 

 the anterior side projecting a little under the beaks, so as to form 

 a small angle, from which it extends in a nearly straight line, 

 and where it gapes: inside wliite or tinged with purple, with the 

 ribs continuing the whole length of the shell. 



The individual represented in our plate, and which we dredged 

 in Torbay, is remarkable for its oblique outline, and the singu- 

 larity of the primary teeth, all of which are deeply cloven. 



(ubeitula- 

 tiiiu. 



Cardium testd suhglobosd solidd,antice suhtruncatu, costis 21^ 

 anticis tuberculatis poslicis subsquamosis sulcisque rugoso- ^^ 



striatis. 



