tM 



Clathratuius. 

 p. 297. 



Recent opportunity of examining many of this, and the- 

 young of the preceding ffjecies, have inclined us to believe 

 they are really diftin61:. The clathratulus we believe never 

 exceeds half an inch in length, and very rarely fo much ; 

 and in all our fpecimens the number of ribs are from fifteen 

 to feventeen, and are extremely thin and delicate. The 

 young of Turbo dathnis of the fame frze are not fo flender, 

 and the number of ribs rarely exceed ten or eleven : in fifty 

 fpecimens examined of that fpecies full grown, not a fingle 

 inftance has appeared where more than twelve ribs could be 

 counted. It is however pofTible in fuch nice diftincftions, in- 

 termediate fpecimens may be found ; but when a great 

 many of the fame fize of both have been examined, and the 

 charafler has hitherto appeared invariable, it is reafonable 

 to infer they are really diftin<5t, though fo nearly allied. — 

 Unfortunately this fpecies has never come to hand alive, fo 

 that the animal could not be confulted. 



We have lately received this from the Scotijlj coaft. 



Elegantissimus, 

 p. 298. 



Turbo acutus. Don. Br: Shells, v. t. 178. f. 3. 

 Helix Elcgantissima. Lin. Trans, viji. p. 209- 



Bryerzus. Turbo costatus. Don. Br. Shells, v. t. 178. f. 3. 



p. 313. Bryereus. Lin. Titans, viii. p. 172, 



Fult, Hutch. Dorstt. t. 19. f. 7. 



This 



