PHYLLIDIANA. MOLLUSCA. LOTTIA. 153 



Shell small, conical, white, oval, having numerous minute 

 radiating ribs, traversed by equally fine concentric lines, which 

 give the surface, when viewed under a magnifier, the appearance 

 of net-work ; summit nearly central, margin slightly scolloped by 

 the termination of the ribs ; interior white. Length ^-^ inch, 

 height -Y^o inch, breadth | inch. 



Only three specimens of this shell are yet known. The first one 

 found was taken by Mr. Couthouy fromthe stomach of a fish caught 

 off Barnstable, and was described by him. A second has since 

 been found by Mr. W. W. Wheildon, of Charlestown. It is at once 

 distinguished by its checkered or granulated surface, no other spe- 

 cies, yet described, having that character. 



Genus LOTTIA, Gray. 



Shell basm-shaped, apex obtuse, usually more depressed and 

 thinner than Patella, and distinguished from it chiejly by its in- 

 habitant. 



Lo'ttia testudinalis. 



Shell oblong-oval, greenish-white, for the most part with 

 brownish sub-dividing radiations ; centre loithin, dark-brown. 



Figure 12. 



State Coll., No. 129. Soc. Cab., No. 767. 



Patella testudinalis, Muller, Prodr., p. 237. Fabr. ; Fauna Grcrnl., 385. 



Lam.; An. sans Vert., v'n. 543. Dillwyn; Catal., lOio. Wood; Catal., No. 



63, pi. 37. 

 Patella testudinaria, Kaemmerer, Rudolst Conch., 12, pi. 2, f. 4, 5. 

 Patella lestudini\ria Grcenlandica, Chejun.; Conch., x. 325, pi. lG8,f. 1614, 1G15. 

 Patella tesselUita, Muller ; Zool. Dan., iii. 2868, teste Dr. Beck. 

 Patella Clealandi, Sowerby; Records of Lin. Soc, viii. 621. Fleming; Brit. 



Anim.,^7. 

 Patella virginea, Muller ; Zool. Dan., iii. 2867. 

 Patella virginea.' Gmelin. ; 3711. Dillwyn ; Catal., 1052. 

 Patella amoe'na, Say ; Journ. Acad. Nat. Sc, ii. 223. 

 Patelloidea amoe'na, Couthouy ; Bast. Journ. J\~at. Hist., ii. 171 . 

 Patelloida testudinalis, Lea ; Trans. Jjmer. Phil. Soc, (New Series,) vii. 73. 

 Patella cly'peus. Brown; Conch, of Great Brit., &c , pi. 37, f. 9, 10. 

 Lottia Antilliirum, Sowerbv ; Conchol. Manual, f. 231. 



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