126 Lt.-Colonel H. H. Godwin- Austen on 



ferred to IleUcarion, tliree to Vitrina. The value of the paper 

 is much increased by the fi^^ures of tlie generative organs 

 given on plate vi. Among these it is interesting to note how 

 similar in every way are these organs in no. 60. //. kivuensis, 

 Tliiele, no. 63. //. schuhofzi, Tliiele, and no. 59. H. semi- 

 memhranaceiis, v. Martens, to the species of South Africa 

 Aviiich I place in the Peltatinae, particularly in the first two 

 species. In no. 60, kivuensis, what is marked [d) is evidently 

 tlie flagellum coiled up with the accessory gland as seen in 

 phoidimus, M. & P., and will be figured in the next part of 

 this paper, while the form of the spermatheca is precisely the 

 same. In no. 63, II. schuhotzi, the penis is separated out 

 and all its parts are distinctly displayed, the flagellum given 

 off close to the vas deferens, the accessory gland on the 

 epiphallus, peculiarly long in this species. 



A glance at this plate shows some other very distinct 

 groups to exist in Africa. In fig. 69, Ilelicarion awiformis, 

 Thiele, can, I suggest, be placed in Africarion, while no. bi>, 

 II. plicatulus, V. Martens, evidently waits to be placed in a 

 new African genus yet to be described, one possessing an 

 amatorial organ. Here is work which I trust Professor 

 Thiele will take up ; he may perhaps have already done so. 

 I must not intrude into the sphere of his labours. 



As this paper will extend into, perhaps, two more parts 

 of this journal, it becomes necessary to give with the first 

 contribution a list of the species and tlie genera in which I 

 provisionally place them. A key to the species of the sub- 

 family I propose giving with the final portion, by which time 

 1 trust I shall be in possession of further material and be 

 able to know more of species I have not attempted to name 

 up to the present. 



Description of the Subfamily Peltatinte. 



Shells globose or globosely conoid, rather thin, some 

 transparent, of few whorls. 



Animal. — Foot divided and with the usual peripodial grooves. 

 Mucous pore at extremity of foot, with a lobe above it; in 

 some species this becomes much lengthened and horn-like. 

 Both right and left shell-lobes present, either small or much 

 lengthened or expanded to cover the shell. The generative 

 organs present a male organ with a long flagellum and a tree 

 ci\3cum coiled up together, the c:\?cum contiguous to but 

 distinct from the retractor muscle. t5})ermatheca a large bag 

 on a strong stalk. The spermatophore elongate, of elaborate 

 form, with many branched s))inos, varying in their shape in 

 dilFereut species. 



