FOSSARUS. 273 



F. OBTUSA, Carp. Fig. 12. 



Narrower, whorls less convex, less sharply costate than F. fenes- 

 trata; whorls flattened behind, ribs swollen, uneven. 



Southern California. 



I suspect that this will prove to be a mere variety of the pre- 

 ceding species. 



Unfigured Species of Isapis. 



F. ANOMALUS, C. B. Ad. Jamaica. 



F. LIRATUS, and F. CONOIDEUS, A. Ad. Japan. 



F. MACULOSUS, Carp. Mazatlan. 



F. OVOIDEUS, Gould. Mazatlan. 



Section COUTHOUYIA, A. Adams. 1860. 

 F. INSIGNIB, Nevill. PL 51, fig. 1 ; PL 52, fig. 13. 



Widely umbilicated, whorls convex, the last subevolute, suture 

 deeply channeled, surface spirally cingulated, elegantly reticulated 

 by longitudinal lines. Length, 7 mill. 



Singapore, Ceylon, Japan. 



F. reticulatus, A. Ad. (fig. 13), is a synonym ; it was first described, 

 but the name is preoccupied by S. Wood. 



Var. DELICATULA, Nevill. 



Smaller, thinner, umbilicus smaller, spiral ribs one or two fewer. 



Bombay. 

 Var. PERSOLUTA, Nevill. 



Last whorl considerably less ventricose and more solute than in 

 the typo. 



Japan. 



Unfigured Species of Couthouyia. 



F. SUBRETICULATUS, Nevill. India. 



F. SOLUTUS, and F. APPRESSUS, Nevill. 'Persian Gulf. 



F. STYLIFERINUS, Nevill. Singapore, Bombay. 



F. PLICIFERUS, F. STRIATULUS, and F. DECUSSATUS, A. Ad. Japan. 



Section CONRADIA, A. Ad., 1860. 

 Unfigured Species. 



F. DOLIARIS, A. Ad., and var. MINOR, Nevill. 



Japan, Hong Kong, Bombay. 

 F. PULCHELLUS, F. TORNATus, F. ciNGULiFERUS, A. Ad. Japan. 



18 



