RHYT1DA. 125 



R. CONFUSA, Pfr. PL 22, figs. 21, 22. 



Umbilicated, rather thin, glossy, closely finely striated; yel- 

 lowish, reddish, or reddish chestnut, sometimes with irregularly 

 radiating chestnut strigations ; whorls 4, the last wide and 

 inflated, rather flattened above, not descending in front ; base 

 convex, smoother and more shining than the upper surface. 



Diam. 1-45, alt. '6 in. 



Australia. 



A var. /9 is not so shining and more distinctly striate on the 

 last whorl ; chestnut-color. 



R. LAMPKA, Pfeiffer. PI. 23, fig. 29. 



Somewhat narrowly umbilicated, thin, very closely arcuately 

 striated, polished ; yellowish brown, greenish chestnut or oliva- 

 ceous, the base smoother and lighter-colored ; whorls 4 (scarcely), 

 the last not descending. Diam. 20, alt. 10 mill. 



Tasmania. 

 R. CAPILLACEA, Fer. PL 23, tigs. 30-32. 



Closely regularl}* striated above, glossy, thin ; horny yellow ; 

 whorls 4, the last somewhat flattened above, more convex, 

 smoother and more glossy below. Diam. 1, alt. -27 inch. 



Port Jackson, Australia. 



Dr. Cox suspects that R. Strangei, Pfr., should be a synonym ; 

 it differs by its revolving sculpture, but that is variable in dis- 

 tinctness, and I am much inclined to Dr. Cox's opinion. 



R. JAMESI, Brazier. 



An unfigured species approaching R. capillacea. It differs in 

 being- flatly depressed, nearly smooth, showing very faint silky 

 lines, which become more rib like at the suture ; color bright 

 horny yellow, strigated with brownish yellow ; shell thinner, and 

 umbilicus wider. Diam. 21, alt. 8 mill. 



Palm Isl., N. E. Australia. 



R. STRANGEOIDES, Cox. PL 23, figs. 33, 34. 



Depressed, somewhat discoidal, thin, transparent, shining, 

 irregularly, rather coarsely striated, decussated with numerous 

 fine close spiral lines ; yellowish horny ; whorls 4, the last 

 depressed above, convex and nearly smooth below. 



Diam. 10, alt. 4 mill. 



Moreton Bay, Australia. 



