On neio MoUusca from South Africa. 633 



its foot-glands. These are six geminate multinucleate bodies, 

 arranged according to size and form as shown by fig. 10. 

 The two in the median line are the smallest and exhibit the 

 most characteristic form, being elongate-obovate, with some- 

 what flattened internal faces and long narrow ducts. Those 

 of the second group are larger, elongate-obpyriform, and have 

 almost horizontal irregularly sinuous ducts ; while the third 

 pair are robust, elongate-subcylindrical, and often variously 

 curved or lobed. The ducts of all seem to meet to form a 

 single common conduit ; but they are so soon lost within the 

 mass of foot-muscles, that it has not been possible to decide 

 this point positively with my specimens. 



EXPLANATION OF PLATE XIV. 



Fir/. 1. Notommata vurax. 



F'uj. 2. Ditto. Auricle, 



Fig. 3. Ditto. Toes, 



Fig. 4, Proales hyalina. 



Fig. 5. Dig/ena contoHa. 



Fig. 6, Mastigocerca spinigera. 



Fig. 7. Cathypna scutaria. 



Fig. 8. Cathypna glandulosa ; dorsal. 



Fig. 9, Ditto; veutral. 



Fig. 10. Ditto, The geminate foot-glands. 



LXVIII. — Descriptions of Eleven new Sjjecies of Land and 

 Freshioater Mollusca from South Africa. By James CosmO 

 Melvill, M.A., F.L.S., and John Henry Ponsonby, 

 F.Z.S. 



[Plate XVn,] 



We consider that several of the Mollusca now to be described 

 possess a peculiar interest, notably the Achatince, one of 

 which has remained long unrecognized, though collected 

 years ago in Bechuanaland by Dr. Livingstone; whilst the 

 other, a remarkably conspicuous though variable form, inhabits 

 the Drakensberg range of mountains. The discovery of a 

 Hapalus so far south in the African continent is likewise 

 important, whilst new forms of the attractive genus Ennea 

 still continue to come to the front, no one species exhibiting 

 much, if any, variability *. ^ 



* See Ann, & Mag. Nat. Hist, ser, 6, vol. xviil, p. 314, 

 Ann. & Mag. N. Hist. Ser. 6. Vol. xix. 44 



