118 RHYT1DA. 



more conspicuous below, somowhat shining ; yellowish chestnut; 

 suture deeply impressed ; lip with a basal tooth. 



Diam. 15, alt. 7 mill. 



N. Caledonia. 



Yar. /9. Globose, smaller, darker color. Diam. 11, alt. 7 mill. 



R. MULTISULCATA, Gassies. PI. 23, figs. 40-42. Magn. f . 



Rather thin, translucent, lightly striulate, with impressed spiral 

 lines ; whorls 5, suture submarginate ; yellowish corneous, some- 

 what shining, occasionally strigate with chestnut ; aperture with 

 a light basal tooth. Diam. 7-11, ah. 4-7 mill. 



JV. Caledonia. 



Vars. minor f depressa and unicolor have been described ; in the 

 latter the chestnut strigations are absent. 



R. COGUIENSIS, Crosse. PL 24, figs. 64, 65. 



Somewhat obliquely rugosely striate, with numerous spiral 

 lines, somewhat shining ; yellowish olivaceous, longitudinally 

 variegated with chestnut, and encircled with dark chestnut bands, 

 one above, one on the periphery, a third on the base, and a 

 fourth around the umbilicus ; behind and near the middle of the 

 outer lip with a slight external scrobiculation ; aperture bluish 

 white, showing the bands, with a deep-seated basal lamella. 



Diam. 12'5, alt. 6'5 mill. 



N. Caledonia. 

 Var. TRIFASCIATA. Upper band wanting. 



Var. MONOZONARIA. Described from a specimen in poor condi- 

 tion, without the basal tooth ; perhaps a juvenile. 



R. FERRTEZIANA, Crosse. PI. 24, figs. 69, 70. 



Obliquely rugosely striate, encircled by rather distant im- 

 pressed spiral lines; dark brown or chocolate ; aperture colored 

 as externally, with a basal lamella. Diam. 14*5, alt. 8 mill. 



N. Caledonia. 



Var. /9. Somewhat smaller, the periphery with a narrow yellow- 

 ish revolving band. 



Yar. f, MONOZONARIA. Smaller, yellowish brown, with chestnut 

 variegations, spire more flattened, last whorl with a broad 

 chestnut band above the periphery, base multisulcate. 



