492 



P. with a fub-conic, fub-pellucid white Ihell, marked 

 with ftrong, longitudinal, tuberculated ribs, and a few 

 circular ridges, that give it a cancellated appearance : 

 vertex refletted, the point very fmall, and turning down- 

 wards : not detached, but adhering to the top of the (hell, 

 fometimes making one convolution ; immediately above 

 which is a rhomboid perforation. Infide fmooth, gloffy, 

 white; margin oval, edge crenated by the ribs. 



This rare fpecies we firfl; found in fand, from Falmouth 

 harbour in Cornwall, and afterwards dredged it up alive 

 in Salcomb bay, in Dcvov/Jiire, adhering to ftones. 

 Length not quite a quarter of an inch, and fcarcc one 

 eighth of an inch in hei<jhth. 



In one inftance this Tnell had a few brown ftreaks run- 

 ning half way up from the margin. 



At the time thefigure was engraved, we were not in 

 poflTeffion of fo large a fpecimen as above defcribed. 



13, 

 Grceca. Patella Grceca. Lin. Syji. p. 1262.— Gmel Syjl. p. 3728. 



Martim Conch, i. t. 11. f. 93. 

 Lifier Conch, t. 527. f. 2. 

 Br. Zool t. 89. f. 153.' 

 Pidt. Cat. Dorfcl. p. 52. 

 Turt. Lin. iv. p. 593. 

 Patella reticulata. Don. Br. Shells, i. t. 21. f. 3. 

 Patella Larvae reticulata. DaCoJi.i t. 1. f. 3. 



P. with 



