PATELLA. 1045 



The base is sometimes three inches long, and nearly two inches 

 and three-quarters broad, but the shell is usually smaller, 

 and often not half so large ; perfect shells I believe are al- 

 ways slightly striated, and 1 rather doubt whether the Lin- 

 naean character was not taken from an artificially polished 

 specimen ; the colour is whitish or pale ash-colour, with 

 ; chestnut-brown spots, disposed either in radiated bands or 

 over the whole surface, and the inside has a pearly coat, 

 through which the external markings are seen ; the muscular 

 impression is generally brown. 



TESTUDiNALis. 64. Shell ovate, entire, with rather 

 obsolete decussated striae ; summit slightly 

 elevated, and nearly central. 



Patella testudinalis. Mailer Zool. Ban. Prod. p. 237. 



Fabricius Fauna Groenl. p. 385. Gtnelin, p. 3718. 

 Patella testudinaria, Var, /3. Kammerer Cab. Rudolst. 



p. 12. t. 2. f. 4 and 5. 

 Patella testudinaria Groenlandica. Chemnitz, x. p. 325. 



t. 168. f. 1614 and l6l5. 

 Patella radiata. Born Mas. p. 425. t. 18. f. 10. 

 Patella virgata. Gtnelin, p. 3727. 

 Patella, No. 88. Schroeter Einl. ii. p. 477. 

 La petite Ecaille deTortue. Favanne, i. p. 495. 1. 1. f. Q2. 

 Inhabits the coasts of Norway. Mailer. Among Fuci on the 

 shores of Greenland ; very common, Fabricius. St: Do- 

 mingo. Favanne. 

 Fabricius says that the largest specimen which he has seen, 

 measured fourteen lines long, eleven broad, and seven high : 

 he says the largest shells are greenish, the smaller tinged 

 with violet, and that the smallest have radiated undulated 

 stripes or tessellated spots of brown ; inside white, glabrous, 

 and the muscular impression coloured like tortoise-shell ; the 

 shell figured by Chemnitz has the inner margin elegantly 

 spotted with brown. 



COMPRESSA. 65. Shell oblong-conical, compressed 

 at the sides, and longitudinally striated. 



Patella corapressa. Litmaus Syst. Nat. p. 126 1. Born 



Mus. p. 426. Schroeter Einl. ii. p. 427. Gmelin, p. 37 18. 



Schreibers Conch, i. p. 356, 

 Le grand Comprirae, ou le Bateau. Favanne. i. p. 521. 



t. 3. f. B 3. 

 Lister Conch, t. 541. f. 25. Knorr, ii. t.26. f.4. Martini, 



i. p. 142. t. 12. f. 106. 

 VOL. II. 2 H 



