116 PSEUDOPEAS. 



of the entire length of the shell ; columella slightly receding. 

 Aperture oblong-oval. Peristome simple, thin, columellar 

 margin dilated. Length 7 to 9, diam. 2 to 2.5 mm. ' ' (Morelet) . 



West Africa: near Landana. 



Stenogyra saxatilis MORELET Journ. de Conch. Jan., 1885, 

 p. 27, pi. 2, f. 1. 



"This little shell, together with the following, belongs to 

 the group Opeas characterized by an umbilical perforation and 

 by a weak reflection of the columellar border. The species is 

 formed of 7% moderately convex whorls, united by a quite 

 deep suture ; the last whorl, relatively longer than the others, 

 is plainly perforated. The somewhat oblique columellar bor- 

 der is weakly dilated throughout its extent, but particularly 

 at its point of insertion, where it is reflected over the umbili- 

 cal perforation. The shell, of a greenish-brown, deeper at 

 the base, is opaque, slightly shining, covered with a fine and 

 irregular costulation, less pronounced on the last whorl of 

 the shell" (Morelet). 



A small specimen received from Morelet, 6 mm. long with 

 6 whorls, is figured. The color and epidermis mentioned by 

 Morelet, are less obvious than he would lead us to expect. 

 Three large eggs show through the penult, whorl. The first 

 1% whorls appear smooth, but under the compound micro- 

 scope they are seen to be densely and very beautifully en- 

 graved spirally. 



3. P. PLEBEIUM (Morelet). PI. 25, figs. 5, 6, 7, 8. 



"Shell narrowly perforate, ovately oblong, apex acute, thin, 

 opaque, slightly shining, under the lens arcuately striolate, 

 brownish-green. Whorls 6, a little convex, the first three 

 smooth, the last enlarged, equal to three-sevenths of the- en- 

 tire length of the shell. Aperture oblong, with simple mar- 

 gins, columella straight, narrowly dilated, reflexed. Length 

 5 to 7, diam. 2.5 to 3 mm." (Morelet). 



West Africa: near Landana. 



Stenogyra plebeia, MORELET Journ. de Conch. 1885, Jan., 

 p. 27, pi. 2, f. 2. 



The shell, of the same nature and color as saxatilis, is also 



