236 FOSSARID^E. 



Section COUTHOUYIA, A. Adams, 1860. 



Shell ovate, profoundly, widely rimate ; spire acuminated ; 

 whorls convex, decussated, with impressed suture ; aperture semi- 

 ovate ; inner lip straight, dilated in front, outer lip arcuate, simple. 



Japan. F. DECUSSATUS, A. Ad. 

 Section COKRADIA, A. Adams, 1860. 



Turbinate, rimately umbilicated, spire somewhat elate; whorls 

 convex, concentrically carinated ; outer lip fimbriated, inner lip 

 not dentate ; umbilicus margined by a semilunar rib. F. CINGULI- 

 FERUS, A. Ad. 



Japan. 

 Section GOTTOINA, A. Adams, 1863. 



Shell spirally ribbed, solid, imperforate. F. SULCIFERUS, A. Ad. 



Japan. 

 Section TUBA, Lea, 1833. 



Shell conical, umbilicated ; whorls rounded, cancellated ; aper- 

 ture rounded, margin not continuous above, columella thickened 

 and reflected at the base. F. ALTERNATUS, Lea, Eocene. 



A labama. 



Subgenus FOSSARIOPSIS, Laube, 1870. 



Distinguished from Fossarus by its closed umbilicus, and the 

 callous expansion of the inner lip. F. RUGOSOCARINATUS, Klipst. 

 Triassic. 



Subgenus RAULINIA, Mayer, 1864. 



Imperforate, rather thin, oval-oblong, spirally sulcate ; outer lip 

 simple, inner lip curved, with a central tooth. F. ALLIGATA, 

 Desh. Miocene. F. BADIA, Tenison-Woods, is a recent Australian 

 species. 



Subgenus IPHITUS, Jeffreys, 1883. 



Imperforate, conical, with spiral rows of tubercles, apex com- 

 posed of a styliform process of several whorls, closely striated 

 lengthwise ; aperture rounded, entire, with simple lip. Operculum 

 corneous, paucispiral. I. TUBERCULATUS, Jeffreys. 



N. Atlantic 0. 



Genus FOSSARINA, Ad. & Aug., 1863. 



Auriform, a little depressed, narrowly umbilicated, spire short ; 

 aperture oval, oblique, lips rounded. Operculum multispiral. F. 

 PATULA, Ad. & Ang. 



Australia. 



