84 GIBBUS. 



longitudinal lines change from coarse line to a nearly smooth 

 surface on the front of the body-whorl just above the aperture. 



West Africa. 



The figure was given by Dr. von Martens as representing G. 

 insignis, but Mr. Smith states that it appears to be his species. 



G. MINOR, Morelet. PL 17, fig. 24. 



Deeply rimate-umbilicated, minutely closely longitudinally 

 striate, suture narrowly margined, lip somewhat thickened, 

 expanded-reflected ; alabaster-white, translucent. 



Length, 21 mill. 



Madagascar. 

 G. LATUS, E. A. Smith. PI. 17, figs. 34, 35. 



Rimate, transparent white, thinnish, obliquely striated, and 

 finely serrated beneath the suture ; lip a little thickened, nar- 

 rowly reflected. Length, 20 mill. 



Central Africa. 

 G. CROSSEANUS, Morelet. PI. 20, fig. 43. 



Profoundly rimate, tumid, thin, densely filiformly striate, 

 shining, subpellucid ; light horn-color ; columella obliquely 

 slightly plicate, lip callous, slightly reflected ; suture narrowly 



marginate. Length, 15 mill. 



Ins. Mayotte. 

 G. VITREUS, Morelet. PI. 17, fig. 33. 



Subrimate, thin, shining, subdiaphanous, white, suture dentic- 

 ulated; margin of aperture slightly expanded. 



Length, 11 mill. Golungo-Alto, Angola, Africa. 



G. ARENICOLA, Morelet. PI. 17, fig. 32. 



Shortly rimate, thin, arcuately ribbed-striate, shining, light 

 yellowish white, shortly denticulate beneath the suture, colu- 

 mella dilated above, outer lip thin, slightly reflected. 



Length, 13 mill. Madagascar. 



* 



* * 



The following species, placed by Pfeiffer in Edentulina, 

 appear to me to be quite as close to Gonospira. 



G. DUSSUMIERI, Reeve. PL 17, fig. 38. 



Obliquely striulate, shining, yellowish corneous ; umbilicus 



perforate, lip expanded. Length, 16 '5 mill. 



Seychelles Islands. 



