PHYLLIDIANA. MOLLUSCA. LOTTIA. 153 



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

 radiating ribs, traversed by equally faie 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 jV inch, 

 height j\ inch, breadth | inch. 



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

 found was taken by Mr.Couthouy from the 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 bnsm-shajjcd, apex obtuse, vsualh/ more (lepressccl and 

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

 habitant. 



Lo'ttia testudina'lis. 



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

 brownish sub-dividing radiations ; centre within, dark-broivn. 



Figure 12. 



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



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



Lku.; An. sans Vert., \ii. 543. Dillwyn ; Ca<a/., 1045. Wood; Catal., No. 



G3, pi. 37. 

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

 Patella testudiniiria Grcenlandica, Chemn.; Conch., x. 325, pi. 168, f. 1G14, 1615. 

 Patella tessellata, Muller ; Zool. Dan., iii. 28G8, teste Dr. Beck. 

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



Jlnim. , 287. 

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

 Patella virginea ? Gbielin. ; 3711. Dillwyn ; Catal.,^0^2. 

 Patella amce^na, Say ; Journ. jicad. JYat. Sc, ii. 223. 

 Patelloidea amce^na, Couthguy ; Bost. Journ. JVat. Hist., ii. 171. 

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

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

 Lottia Antillaruin, Sowebby; Conchol. Manual, f. 231. 



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