72 GASTROCOPTA. 



and G. hermosa (Jousseaume) from the northern part of the 

 Ethiopian Region in Abyssinia, Eritrea, Senegal, and British 

 East Africa. The discovery of a closely related form in Natal 

 extends the range of this group of gastrocopts, which is 

 characterized by the great convexity of the whorls. It prob- 

 ably occurs in places all over the Ethiopian Region. 



Pupa klunzingeri var. senegalensis von Maltzan appears to 

 agree rather closely with G. thotnasseti except perhaps in the 

 sculpture, which is described as more densely and delicately 

 costulate than G. klunzingeri. It has not been figured, and I 

 have not seen specimens. Moreover, the name of that Senegal 

 form is preoccupied by Pupa senegalensis Morelet. G. klun- 

 zingeri of Abyssinia and the Kenya Colony tapers more 

 rapidly than G. thomasseti, the last whorl being wider, the 

 costulation is slightly stronger and more regular, and both 

 upper-palatal and basal folds are developed. In the speci- 

 mens of G. thomasseti seen, a very small upper-palatal fold 

 was noticed in one only. 



While the summit of the angulo-parietal lamella is generally 

 distinctly bilobed, as in the figured type, there are a few 

 examples in which it is level, the angular and parietal com- 

 ponents being more completely united. 



Gastrocopta dahli Thiele. PL 18, fig. 2. 



Two colorless shells from Ralum are rather cylindric, with 

 weakly, obliquely striate, convex whorls. Apex rather obtuse. 

 The upper whorls increase distinctly; the penult is about as 

 wide as the last but not so high. The aperture is rather 

 small ; a parietal lamella is bifid, its outer part passes in a 

 curve into the outer lip; in the right side there is a tooth 

 some distance from the margin, and a second, somewhat 

 longer, where the outer passes into the basal margin. On the 

 columella a denticle on the lower part of a more inwardly 

 placed thickening is visible. The peristome is widened but 

 not expanded; the umbilical fissure is hardly perforated. 

 Height 2.25, diam. 1.1 mm. {Thiele). 



Bismarck Archipelago: Ralum (Dahl). 



