100 PATELLA-SCUTELL ASTRA. 



Var. NIGROSULCATA Reeve (pi. 61, figs. 66, 67). " Ovate, rather 

 solid, radiately grooved, grooves narrow, rather distant; rough 

 chalk-white, grooves more or less black ; interior yellowish-white, 

 border faintly lineated." This seems to be a regularly oval form 

 smaller than v. paumotensis, and more stained with rust-red inside. 

 Numbers of shells before me correspond with Reeve's figures. 



P. ACULEATA Reeve. PI. 25, figs. 20, 21 ; pi. 62, figs. 71, 72, 73. 



Shell oblong-oval, solid, conical, the apex at the front third. Sur- 

 face dull, having numerous (about 23) strong, carinated, and more 

 or less scaly-nodose ribs. White, with inconspicuous rust- reddish 

 concentric bands. 



Interior whitish, tinged toward the middle with orange-brown, the 

 cavity of the apex white with blue-black stains. Edge of shells 

 dentate, having several narrow short reddish lines in each interval. 

 Clarance River to Twofold Bay, Australia; Tasmania. 



P. aculeata REEVE, Conch. Icon., f. 90, 1855. ANGAS, P. Z. S. 

 1867, p. 221. TENSION-WOODS, Proc. Roy. Soc. Tasm. 1877, p. 22. 

 BRAZIER, Proc. Linn. Soc. N. S. W. xiii, p. 224, 1883. P. 

 squamifera Rv., 1. c., f. 94. ANGAS, I. c., p. 221. 



There are about 23 large ribs, and some smaller ones in the 

 interstices. The apex is at the anterior third, not central as it is in 

 P. stellceformis, and the ribs are scaly. It is a common form at Port 

 Jackson. The description of Reeve's P. squamifera, which Brazier 

 considers a mere synonym of this variable shell, is as follows : 



P. squamifera Reeve (pi. 62, figs. 74, 75). Shell ovate, some what 

 depressed, rather thick, apex nearly central ; radiately roughly 

 ribbed and ridged, ridges irregularly rudely scaled. Whitish tinged 

 with ash and black. Interior bluish-white. 



This is a solid, ash-colored shell, roughly sculptured throughout 

 with irregular scaly ribs and ridges. (Rve.) 



P. MORBIDA Reeve. PL 15, figs. 3, 4. 



Shell ovate, rudely depressed, rotundately raised in the middle, 

 radiately fimbriately ridged, more or less eroded, ridges obsoletely 

 short-spined. Interior yellowish-w r hite, more or less irregularly 

 stained with black ; exterior rust-eroded. (Eve.) 



Cape of Good Hope. 



P. morbida RVE., Conch. Icon. f. 64, Jan. 1855. 



Of a characteristic depressedly furbelowed growth round the mar- 

 gin, the radiating ridges armed here and there with short, sharp 



