GIBBUS. , 85 



G. ANODON, Pfr. PL 17, figs. 27, 28. 



Profoundly rimate, distinctly obliquely striate, alabastrine ; 

 columella obliquely plicate, above, margin of aperture somewhat 

 thickened, subrepand. Length, 15-17 mill. 



Mauritius, Ins. Mayotte, 



Fig. 28 represents a chestnut-brown variety, a rather unusual 

 color in the genus. 



G. REEVE ANUS, Pfr. PL 17, fig. 31. 



Shortly rimate, rather thin, distinctly obliquely plicate-striate. 

 shining, greenish hyaline ; suture submarginate, in the last whorl 

 closely denticulated ; lip white, slightly reflected. 



Length, 15 mill. 



Hob. unknown. 



Appears to be closely related to the preceding species ; I am 

 not acquainted with it. 



G. STYLODON, von Martens. PL 17, figs. 39, 40. 



Closely related to G. Reeveanux, Pfr., but distinguished by 

 having a tuberculiform tooth on the columella. 



Length, 12-13 mill. 



Bonjongo, W. Africa. 



Section GONOSPIRA, Swainson, 1840. 

 G. METABLETA, Crosse. PL 21, fig. 86. 



Profoundly rimate, rather thin, closely obliquely costulate, 

 bluish white, scarcely shining, margin of lip white, shortly 

 expanded. Length, 19 mill. 



7s/. of Rodriguez. 

 It is G. Dupontianus, Crosse, not Nevill. 



G. DEALBATUS, Webb and Berthelot. PL 21, fig. 2. 



Shortly and profoundly rimate, closely obliquely ribbed- 

 striated ; whitish; lip shortly reflected. Length, 18 mill. 



Canary Islands* 

 G. FUNICULA, Val. PL 21, fig. 88. 



Profoundly rimate, obliquely closely ribbed-striate ; lip sub- 

 simple, very shortly expanded ; dirty white. 



Length, 12-14 mill. Mauritius. 



According to Nevill, is a synonym of G. versipolis, Fer., but 

 it appears to me to differ considerably from that species. 



