SLSTRIM. 189 



Var. Fisco-NrdHA, Diinker (1*1. 50, fig. 258). 



Shorter and stouter than tlie type : internally chocolate-colored. 



Length. 1 7 mill. 



Kingnmill hi. 



No ttguie of this form having been given hitherto, I am able 



to give one from a specimen forming part of the original lot. 



R. UNDATA, Ohemn. PL 59, figs. 259-268, 270, 271. 



Shell shouldered, with rounded longitudinal ribs, crossed by 

 close, scabrous, revolving, raised lines. Brown or blackish ; 

 aperture light chocolate or violaceous within. 

 Length, '75-1.5 inches. 



Tranqiiehur ; Natal; Vhina; Japdu ; Australia ; 



Polynesia to Paumotus Isles. 



I adopt the above name with some hesitation, as Chemnitz is 

 not a consistently binomial author; it is undoubtedly prior to 

 any other name for the species, whilst its rejection would involve 

 the necessity of adopting either margarificola, Brod., or viuricina, 

 Bl., both published in the same year, 1832. Frequently the 

 revolving ribs are broken up by the longitudinal eleva.tions into 

 long, bead-like tubercles, which are not scabrous, and in this 

 state it somewhat resembles R. concatenata, Lam. Purpura reti- 

 culata, of Quoy (fig. 264), and P. hvmilis, of Crosse and Fischer 

 (fig. 265), both appear to me to be young shells of this beaded 

 form. 



Var. ALBOVARIA, Kuster. PI. 59, flg. 271. 

 Shell banded. 



R. Adelaidensis, Crosse. PI. 59, fig. 273, 



Whitish or yellowish, the aperture violaceous. 



Length, -75 inch. 



Australia. 



I suspect that this will prove a variety of the preceding species. 



R. concatenata, Lam. PI. 59, fig. 269. 



Whitish, yellowish or gray; the bead-like revolving tubercles 

 generally daik colored ; aperture sometimes orange or violet 

 within, frequently white. Length, 1-1*25 inches. 



Philippines; Australia. 



