PATELLA-SCUTELLASTRA. 103 



P. granularis LINN., Syst. Xat. x, p. 782. HAXLEY, Sh. of Linn, 

 p. 419. LAM., An. s. Vert, vi, p. 330. REEVE, Conch. Icon. f. 

 31. KRAUSS, Die Siidafric. Moll. p. 52. QUOY & GAIMARD, Voy. 

 de 1'Astrol. iii, p. 341, t. 70, f. 12-15. 



Characterized by the closely granose riblets of the outside and 

 the broad dark border and large orange-brown central area of the 

 interior. It is not at all iridescent within. 



In one specimen (pi. 63, fig. 83) of this species before me the 

 earlier portion is black, finely but obsoletely radiately striated, dif- 

 fering totally from the normal later growth. A similar change of 

 structure has already been noticed in this volume, page 18, under 

 Acmcea pelta var. nacelloides. 



P. NATALENSIS Krauss. PI. 13, figs. 65, 66, 67. 



Shell oval or oblong, conical, rather solid, slopes straight ; apex 

 at the front third. Surface sculptured with 40-46 rather separated 

 regularly granulose riblets. Color ashen or blackish, the granules 

 black ; apex generally eroded. 



Interior white, the margin intensely black, having a border of 

 blackish-brown flames ; central area dark reddish-brown. 



Length 31, breadth 23, alt, 12 mill. 



Length 27, breadth 20, alt. 11 mill. 



Natal, northward to Guinea. 



P. natalensis KRAUSS, Die Siidafric. Moll., p. 53, t. 3, f. 10, 1848. 

 P. echinulata KRAUSS, I. c., p. 52, t. 3, f. 15. P. nigrosquamosa 

 var. miliaris PHIL., Zeitschr. f. Mai. 1848, p. 162. P. nigrosquamosa 

 var. 1, DKR., Ind. Moll. Guin. Infer., p. 41, t. 7, f. 7, 8. 



This is a compact, long-oval species. The outside is blackish with 

 black tubercles on the riblets. The eroded apex is brown or clouded 

 with brown, and surrounded by a white tract, which usually is 

 digitate or rayed more or less, as figure 66 shows. The black outer 

 layer is quite thin. The .margin is intensely black. The central 

 spatula varies from olive-brown to a deep red-brown. Philippi's 

 ?;u7i'am Dunker's var. 1 of nigrosquamosa (pi. 13, figs. 63, 64) is a 

 synonym. 



Var. ECHINULATA Krauss. PL 13, figs. 60, 61, 62. 



Smaller, narrower; grayish-brown, rayed with whitish. The 

 basal side-margins are somewhat raised, so that the shell rests upon 

 the ends only. 



Table Bay. 



