1052 PATELLA. 



CAECA. 81. Shell oval, with crowded longitudinal 

 elevated dotted strise, and the summit acute 

 and erect. 



Patella caeca. Gmelin, p. 371 1. 



Patella coeca. Muller Zool. Dan. i. p. 12. 1. 1£. f. 1 (o3. 



Inhabits the bay of Drobach, in Norway, on stones. Muller. 



Shell about four lines long, and two-thirds as broad, pellucid, 

 of a dark colour with a white border, and marked with from 

 sixty to eighty striae, which extend from the summit to the 

 margin, and are furnished with minute elevated dots j the 

 summit is mucronated but not recurved. 



VIRGINEA. 82. Shell oval, very entire, with pale 

 purplish longitudinal rays, and the summit 

 nearly marginal. 



Patella virginea. Muller Zool. Dan. i. p. 13. 1. 12. f. 4 

 and 5. Gmelin, p. 3711. Maton and Racket, in Lin. 

 Trans, viii. p. 235. Dorset Cat. p. 59- t. 14. f. 1 1. 

 Patella parva. Da Costa Brit. Conch, p. 7. t. 8, f. 11. 

 Donovan, i. t. 2 1 . f. 2. Montagu Test. p. 480. 

 Inhabits the coasts of Norway on Fuci. Muller. West of 

 England. Da Costa, 8^c. Langlan Bav, near Swansea. 

 L. W. D. 

 Shell about three-eighths or sometimes half an inch long, and 

 two-thirds as broad, minutely striated, and of a reddish or 

 greyish white colour, with about eighteen pale purplish rays 

 extending from the summit to the margin ; the inside is 

 glossy, and appears radiated like the outside from the trans- 

 parency of the shell. 



TESSELLATA. 83. Shell oval-oblong, very entire^ 

 finely striated longitudinally, and whitish, 

 tessellated with red spots. 



Patella tessellata. Muller Zool. Dan. i. p. 13. t. 12. i.Q 



and 7 . Gmelin, p. 37 1 1 . 

 Ola ff sen Islandica. t. 11. f. 11.? 



Inhabits Fuci on the coasts of Norway. Muller. 



Shell about nine or ten lines long, and not much more than 

 half as broad, and has an obsoletely mucronated summit^ 

 which is placed more than twice as near to one end as to the 

 other ; the inside is coloured like the outside^ aud has the 

 muscular impression red. 



