OF CONCHOLOGY. 275 



d'h. Nat. Test. 2, p. 238, 239, Paris, 1775 ; Martini, in 

 Neueste Mannigfaltigkeiten, Berlin, 1778, p. 417, t. 2, 

 f. 13, 14 ; Helbling, Abh. einer Privatges, in Bohmen, 

 vol. iv, p. 104, t. 1, fig. 5, 6 : 1780, Prag. fide Gmelin, 

 op. cit.) 

 Patella mytiliyia, Scbub. and Wagn., Sup. Martini, pi. 229, f. 

 4052, 4053, Nurnberg, 1829. Desh. Ed. An. s. Vert. 

 1836, p. 541, No. 45. 

 Patella conchacea, Gmelin, Syst. Nat. 1792, vol. 1, part vi, p. 

 3708, No. 8(3. (Martini, in Nueste Mannigf. p. 417, t. 

 2, f. 13, 14, Berlin, 1778 ; fide Gmelin). 

 Patella conchacea, Bosc, Cours Compl. d'Hist. Nat. Paris, 

 iii, p. 206, 1800. Leuckart, Isis, xvi. Col. 719, No. 3, 

 1825. Sebum., Essai, p. 179. Schrot., Einl. p. 482, 

 No. 100. 

 Nacella mytiloides, Sebum., Essai, p. 179, pi. xxi, f. 3. 

 Leuckhart, Isis, xvi, 1825, Col. 719, No. 3. Gray, 

 Guide, p. 169. 

 Patella mytiloides, Desh., An. s. Vert, vii, p. 541, No. 45, 



1836. 

 Patella cymbularia, Lam., An. s. Vert, vi, p. 335, No. 45, 1819. 

 Ed. Desh., 1836, vii, p. 541, No. 45. Blainv., Mai. pi. 

 xlix, f. 6. Chenu, Man. de Concbyl. i, p. 378, f. 2846. 

 Gld., Moll, U. S. Expl. Exp. p. 341. 

 Patella cymbuloides, Gld., op. cit. in syn. (as of D'Orb.) erro- 

 neously. 

 Nacella cymbalaria, H. and A. Ad., Gen. Rec. Moll, i, p. 467, 



pi. Iii, f. 10 a. 

 Soft parts : foot regularly oval, rather broader before, pale 

 slate color on the sole, yellowish near the edges, finely granu- 

 lated. Mantle edge thick, smooth, purplish, furnished with three 

 rows of retractile filaments, arranged in quincunx order in rela- 

 tion to each other, the inner row the largest ; one of these fila- 

 ments, at the extreme posterior end of the animal, seemed con- 

 siderably larger than the rest, like a tail. The larger cirri are 

 tinged with purple at the base, the remainder yellowish. Bran- 

 chial lamellas small, yellowish, very fine and close set, diminishing 

 anteriorly, and very small in front of the head, but not inter- 

 rupted. Hood large, much prolonged, thin, very varicose. 

 Head small, pale brown. Muzzle very long, almost probos- 

 cidiform ; edge papillose, disk radiately granulose, destitute 

 of any frill or lappets ; mouth subcircular, entire ; buccal lips 

 double on each side. Tentacles moderately long, stout and 

 bluntly pointed, pale brown. Renal papilla rounded, conical, 



