RHYTIDA. 121 



R. PINICOLA, Pfr. PL 28, figs. 33, 34. 



Depressed, thin, closely arcuately striate ; yellowish brown, 

 maculated with chestnut at the suture, elsewhere covered with 

 zigzag chestnut lines ; whorls 5, spire plane. 



Diam. 7'5, alt. 3 mill. 



Isle of Pines , New Caledonia. 



Is more depressed than the preceding species, and has not its 

 angulated periphery and umbilicus. 



R. ORIUNDA, Gassies. PI. 28, figs. 46-48. 



Shell with rather wide umbilicus, fragile, pellucid, shining, 

 finely spirally striate ; yellowish, with chestnut undulating lines 

 and maculations, the former paler and finer around the umbilicus. 



Diam. 5, alt. 3 mill. 



New Caledonia. 

 R. BAZINI, Crosse. PI. 28, figs. 35, 36. 



Subdiscoidal, thin, very closely arcuately striate ; light 

 corneous, with angulated zigzag chestnut lines, and macula- 

 tions of the same color at the suture ; spire somewhat plane, 

 whorls 4^, with deep suture, the last whorl not descending, 

 obsoletely subangulate on the periphery, the base somewhat 

 plane, with a conical umbilicus. Diam. 5, alt. 1'5 mill. 



New Caledonia. 



A smaller, more depressed shell than the related species. 

 Crosse has distinguished a var. minor, less distinctly striate, 

 the color darker, the lines of chestnut broader. 



Diam. 4, alt. 1-25 mill. 



R. IN^QUALIS, Pfr. PI. 24, figs. 57, 58. 



Shell rather solid, densely obliquely rugosely striate above, 

 smoother and shining below, with impressed spiral lines ; yel- 

 lowish brown, with a few light chestnut strigations, often with a 

 chestnut band on the periphery. Diam. 22, alt. 9 mill. 



New Caledonia, Isle of Pines. 



R. Fischeri, Gassies, is founded upon a uniformly chestnut- 

 colored variety of this shell. 



R. SINCLAIEI, Pfr. PI. 24, figs. 71, 72. 



Shell thin, regularly closely costate-striate ; orange-brown, 

 with numerous interrupted chestnut revolving bands and lines ; 



