361 



of angolensis, from Angola, received from Morelet, and are un- 

 able to separate them. The species belongs in the group charac- 

 terized by an extremely reduced spire, so that the ellipsoidal 

 aperture approaches the whole length of the shell. B. strigosus 

 (von Martens) and B. nyassanus (F. Smith), which we have not 

 recognized in our material, appear to be nearly allied to B. ango- 

 lensis, as is also B. coulboisi. 



The specimen figured, from the Geale lot, could not be mea- 

 sured. 



jength 



Width 



A p. Lenyth 



Ap. 



Width 





11.0 



6.5 



8.0 



3.0 



mm. 



Coll. Geale 



11.0 



9.0 



9.0 



5.0 





Cotype 



11.5 



9.5 



10.0 



6.0 





" 



10.0 



7.5 



8.0 



5.0 





n 



10.5 



8.0 



8.0 



4.5 





a 



9.0 



7.5 



S.O 



3.0 





tt 



Connolly (1912) calls attention to the analogy between ango- 

 lensis and -parietalis (Mousson), and quite possibly these two 

 names apply to the same species. 



Bulinus truncatus (Audouin). 



Physa truncata Terussac' Audouin 1826, Explication Som- 

 maire des Planches de Mollusques, p. 34 (Egypt; based upon pi. 

 2, fig. 27 of Savigny 1812, Description de l'Egypte, H. Nat., 

 Zoologie, Coquilles, published without name). Not Physa 

 truncata H. Adams 1861, of Australia. 



Savigny's figure 27, 1', supposed to be natural size, shows a 

 shell 5.25 mm. long and 3.5 mm. wide, with the aperture 4 mm. 

 ong. We have recognized this species in a snail collected at 

 Wadi Feran, Egypt, by Dr. Phillips in 1914. This measures: 

 length, 6 mm.; width, 4.5 mm.; length of aperture, 4.5 mm.; 

 width of aperture, 2.5 mm. 



Pallary (1909, Mem. Inst. Egyplien 6, pt. 1, p. 52) states that 

 P. truncata was based upon young specimens of Isidora brocchii 

 Ehrenberg (1831). Even if this were correct, Audouin's name 

 would have to be used for the species, since it was published five 

 years earlier. So far as we have been able to trace, no figure 

 based upon Ehrenberg's types has been published. The dimen- 



