PATKLLA-SCUTELLASTRA. 101 



black and white spines. Exteriorly the shell is roughly rust-eroded ; 

 interiorly it has a peculiarly diseased look. (Rve.) 



P, CHAPMANi Tenison-Woods. Unfigured. 



Shell ovate, somewhat broad behind, reddish or scorched and 

 nebulously brown, apex acute, submedian ; with 8 radiating ribs 

 more or less valid, and depressedly rounded, profusely radiate with 

 very fine lirse, and girdled with irregular sulci ; margin angulate, 

 nodulose. White within and clouded pale rose color, spatula 

 scarcely visible. Length 20, breadth 15, alt. 5 mill. (T.-TF.) 



Tasmania. 



P. chapmani T.-W., Proc. Roy. Soc. Tasm. for 1875, p. 157, 1876. 



Very rare. Four of the ribs are posterior, and the four anterior 

 are smaller. ( T- W.) 



P. usTULATA Reeve. PI. 22, figs. 11, 12. 



Shell somewhat squarely ovate, a little attenuated in front, pos- 

 teriorly convexly depressed, anteriorly tumidly umbonated, apex 

 obtuse ; radiately elevately striated, strire scabrous next the mar- 

 gin ; burnt-red, neatly rayed with rather distant narrow white bands, 

 strise more or less black next the margin, interior \thite. (Rve.) 



Ihsmania (Tenison-Woods). 



P. ustulata RvE., Conch. Icon f. 88, Jan., 1855. — Tenison-Woods, 

 Proc. Roy. Soc. Tasm, for 1876, p. 49, 1877.— P. tasmauica T.-W., 

 /. c. for 1875, p. 157, 1876. 



Tenison-Wood's description of his P. tasmanica is as follows : 



Shell ovate, solid, sordidly yellowish white, often corroded, apex 

 sub-median with about 21 valid, angular radiating ribs, and the in- 

 terstices rayed profusely with very fine subimbricated lirse ; within 

 ivory white and shiny, more or less tinged with yellow ; margin 

 narrow, elegantly pectinated ; margined with a very fine blue line 

 within, and an interrupted dusky brown line outside. Spathula 

 scarcely defined. 



Recherche Bay and south generally. Nearer to P. alticostata 

 Angas than any other. 



Length 49, width 38, alt. 20 mill. (T.- W). 



"If I am right in my identification of this shell, it must be the 

 same as my P. tasmanica described in last year's Proceedings of this 

 Society. Reeve gives no habitat for his shell, which from appear- 

 ance was worn and corroded. The unworn specimens found living 



