96 PATELLA-SCUTELLASTRA. 



Nov. Holl. p. 33, 1843 ; and also Zeitschr. f. Malac. 1844, p. 62. 

 P. pileus MKE., mss. f P. indica GMEL., Sygt. Nat. xiii, p. 3716, 

 founded on Gualtieri, Testarum, t. 8, f. E, and Martini, Conch. 

 Cab. i, p. 106, t. 7, f. 49. P. melanogramma f SOWERBY, Genera, 

 Patella, f. 1 (good!); not P. melanogramma Gmel., Syst. xiii, p. 

 3706, no. 74. P. neglecta GRAY, in Capt. King's Survey of the 

 Inter-tropical and Western Coasts of Australia, ii, appendix, p. 

 492, 1827. P. zebra REEVE, Conch. Icon. f. 7, Oct. 1854. 



This large species is much more strongly ribbed than P. argent- 

 villei. The ribs are very unequal. The position of the apex is 

 more anterior in my specimens than in Reeve's figures, in one speci- 

 men being decidedly in front of the anterior third, nearly reaching 

 the fourth. The ribs are rudely nodular in young or half grown 

 shells, but become obsolete and eroded with age. 



Notes on synonymy. That this species is not the P. rustica of 

 Linnaeus' Systema x, is obvious (see under P. lusitanica, this volume). 

 Whether it is the rustica of his later publications (Mus. Lud. 

 Ulricse, p. 694, etc.) or of Gmelin, is a useless question into which 

 we need not enter, but with Menke, I am disposed to believe that it 

 is. Reeve's P. rustica has nothing to do with this species, being 

 either a large P. lowei or an immature P. patriarcha. The P. indica 

 of Gmelin, founded upon Gualtieri's figure and Martini's embellished 

 copy of it, is very doubtful at best. Sowerby gave a most excellent 

 figure under the name melanogramma, but it is not the shell so 

 named by Gmelin. Gray fixes the identity of his P. neglecta by 

 stating that it is the P. melanogramma of Sowerby's Genera, not of 

 Gmel. 



P. BARBARA Lhme\ PI. 59, figs. 50, 51, 52, 53, 54, 55 ; pi. 15, figs. 



1,2. 



Shell rather large, depressed or conical, ovate ; apex central ; 

 slopes nearly straight. Sculptured with numerous elevated, acute 

 narrow 7 riblets, which bear conspicuous narrow vaulted spines. 

 White or tinged with brown, the spines usually tipped with brown. 



Interior white, either immaculate or having the central area 

 stained with light orange-brown. Margin strongly toothed, having 

 a colorless border. Length 72, breadth 60, alt. 27 mill. 



Habitat unknown. 



P. barbara LINN., Syst. Nat. x, p. 782. HAN LEY, Shells of 

 Linnaeus, p. 418. LAM., An. s. Vert, vi, p. 325. P. plicata BORN, 



