1018 PATELLA. 



logue, lot 3983, is different, and the present shell at lot 2526 

 is called the Cup and Saucer. 



** IVit/i an i7iternal transverse partition. 



TROCHiFORMis. 6. Shell conical, somewhat spiral, 

 with the whirls longitudinally plaited, and 

 the margin entire. 



Patella trochiformis. Chemnitz, x. p. 335. t. 168. f. J 626 



and 1627. Gmelin, p. 3693. 

 Patella, No. 147. Schroeter Einl. ii. p. 503. 

 Le Lepas volute chambre. Favanne, i. p. 551. t. 4. f. A I. 

 Knorr, iii. t. 29- f. 1 and 2. Meiischen Naturf, xviii. t. 2. 

 f. 17. Humphreys Conch, t. 6. f. 2. 



Inhabits the coasts of the Falkland Islands. Favanne. Tran- 

 quebar. Chemnitz. 



Shell about an inch in diameter, and ten lines high, of a dirty 

 white colour, with yellowish brown longitudinal oblique 

 plaits ; it has a spiral obsolete suture, with the appearance of 

 three or four whirls, and the inside has a transverse appen- 

 dage, which becomes narrower as it turns somewhat spirally 

 upwards. 



TROCHOIDES. 7. Shell convex, spiral, with longi- 

 tudinal undulated ribs, and the margin cre- 

 nated. 



Patella trochiformis, Var. ^. Gmelin, p. 3694. 



Patella, No. 136. Schroeter Einl ii. p. 498. 



Ancilia volutata. Mas. Geversianum, p. 248. 



Le Bouton de Chapeau. Favanne, i. p. 552. t. 4. f. A2. 



Argenville, t. 2. i. L. Martini, i. 1. 13. f. 135. 



Inhabits 



Shell eleven, or sometimes fifteen lines in diameter, and has 



the summit more rounded and less elevated than in P. trO' 



chiformis, and appears from Favanne's description to be a 



still more remarkable link between the Patella and Trochi ; 



it is of a reddish brown colour, with the inside white, and 



the transverse somewhat spiral partition tinged with lilac. 



NERiTOiDEA. 8. Shell ovate, with the summit 

 slightly spiral and recurved, and the margin 

 entire. 



Patella neritoidea. Linnaus Syst. Nat. p. 1257.? Mar- 

 tini, i. p. 16 1. 1. 13. f. 133 and 134. Gmelin, p. 3692. ? 

 Nerita violacea. Gmelin, p. 3686. 



