1 08 STREPTOSTELE. 



Genus STREPTOSTELE, Dohrn, 1866. 



S. LOTOPHAGA, Morelet. PI. 20, fig. 69. 



Longitudinally thinly and regularly striate, suture minutely 

 crenulated ; yellowish horn-color. Length, 26 mill. 



Prince's Isl., Gulf of Guinea. 



S. FOUNT, Mcrelet. PL 20, figs. 72, 73. 



Subimperforate, striate, dinphanous, hyaline, suture crenu- 

 lately margined ; aperture with the lip a little thickened and 

 somewhat expanded, the columella somewhat twisted. 



Length, 16 mill. 



Prince's Island. 

 S. BucHHOLzr, Martens. PL 20, fig. 76. 



Imperforate, thin, arcuately striate, shining, yellowish white ; 

 columella a little twisted, lip simple, not thickened. 



Length, 13-5-15-5 mill. 



Bonjongo, W. Africa. 

 ? S. METULA, Crosse. PL 20, fig. 26. 



Somewhat covered-rimate. thin, translucent, shining, yellowish, 

 lightly costulate-striate, more distinct at the sutures ; margin of 

 aperture simple, columella not folded. Length, 11 mill. 



Nossi Comba, Madagascar. 



Section ELMA, H. Adams, 1866. 



S. FASTIGIATA, Morelet. PL 20, fig. 74. 



Somewhat covered-rimate, arcuatety striate, suture crenulated, 

 hyaline, shining yellowish; lip thickened, callous, emarginate 



above. Length, 25-26 mill. 



Prince's Island. 



Yar. MINOR. Nine instead of ten whorls, columella straight. 



Length, 17 mill. 



According to Dohrn the animal is reddish orange. 

 S. INCISA, Morelet. PL 20, figs. 44, 45. 



Subrimate, smooth, semipellucid, shining, horny white, suture 

 minutely denticulate; lip callous, obtuse, shortly reflected, pro- 

 foundly incised above. Length, 11 mill. 



Ins. Mayotte. 



