RHYTIDA. 125 



R. CONFUSA, Pfr. PI. 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. ft is not so shining and more distinctly striate on the 

 last whorl ; chestnut-color. 



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



Somewhat narrowly umbilicated, thin, veiy 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 regularly 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 E. 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. JAMESF, Brazier. 



An unfigured species approaching E. 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 coarsety 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. 



