194 ACANTHINULA. 



According to Morelet and Drouet, the shell they called H. 

 aculeata occurs at high elevations, in the laurel woods among 

 fallen leaves. Morelet reported it from S. Miguel and Fayal. 

 The specimens before me from the former island were re- 

 ceived from Morelet as H. aculeata. 



It differs from the continental A. aculeata by the more 

 lengthened shape and the very delicate riblets without trace 

 of appendages, though these may be present in fresh, young 

 specimens, as Mousson found them in A. spinifera. 



ACANTHINULA EXPATRIATA Preston. PI. 32, fig. 9. 



Shell globosely turbinate, with elevated spire, thin, covered 

 with a shining pale bronze periostracum, which is raised on 

 the later whorls into rather distant, regular, very oblique 

 ridges, each ridge bearing a coarse, long, broad-based, mem- 

 branaceous bristle at the periphery ; whorls 4, rapidly increas- 

 ing, convex; suture deeply impressed; base of shell convex, 

 showing traces of very fine, spiral sculpture between the 

 ridges of the periostracum; umbilicus narrow, very deep, 

 partly concealed by the expansion of the outer margin of the 

 columella; columella descending in an oblique curve and dif- 

 fused above into a whitish, parietal callus, both it and the 

 labrum white, slightly reflexed and outwardly broadly sur- 

 rounded by a reflexed extension of the membranaceous peri- 

 ostracum, thus forming a double margin ; aperture subcircular. 

 Alt. nearly 2.5, diam. maj. 2 mm. (Preston). 



British East Africa : Mount Kenia, at an altitude of 9,000- 

 10,000 feet. 



Acanthinula expatriata Preston, Ann. Mag. N. H. (8), vii, 

 May, 1911, p. 469, pi. 11, f. 17. 



This form appears to be very closely related to A. aculeata. 



Acanthinula peracanthoda (Bgt.). 



Vol. iii, p. 54. Abyssinia. 



Species of uncertain position. 



If it were not that Moellendorff was acquainted with the 

 genus Pupisoma when he wrote the following descriptions, I 

 would refer these species to that genus. Under the circum- 



