new Mollusks from South or Central Africa. 89 
Bredasdorp specimen as the type. Though minute, the sculp- 
ture is most elaborate, with fine oblique lirula extending over 
the entire surface. The umbilicus is deep, though narrow, last 
whorl serrately keeled, aperture somewhat square, lip simple. 
We provisionally place this species under Pella on account 
of its similarity of texture to HZ. b’sculpta (Benson) and allies ; 
but there can be no doubt but that in some respects it 
approaches the subgenus Martensia (Semper). 
5. Helix (Pella) bathycele, sp.n. (Pl. V. fig. 4.) 
Hf, testa minuta, profundissime umbilicata, tenui, corneo-virente, 
planorbiformi, apice fere immerso ; anfractibus sex, convexis, ad 
suturas impressis, liris regularibus longitudinaliter undique cinctis, 
anfractu ultimo rapide accrescente, infra effusa; peristomate | 
tenui, simplici; apertura lunari. 
Long. 1°50, lat. 2°50 mill. 
Hab. Under dead leaves in the bush, Craigie Burn, Somer- - 
set Kast, 8. Africa (Miss Mary Layard Bowker). 
Another very lovely species, though minute, and conspicu- 
ous for its flattened upper whorls as well as its deep perspec- 
tive umbilicus, the whole surface of the greenish-horny shell 
being decorated with fine longitudinal regular lire. 
Five specimens. 
6. Helix (Trochozonites) dioryx, sp.n. (Pl. V. fig. 2.) 
H. testa conico-pyramidali, obtecte umbilicata, ad basin planato- 
convexa, trochiformi, opaca, albo-grisea, scrupulosa, epidermide 
brunnea tecta; anfractibus septem, infra suturas canaliculatis, 
costulis rugulosis regulariter oblique dispositis, ultimo ad_peri- 
pheriam carinato; apertura quadrata; peristomate tenui, sim- 
plici, apud marginem columellarem paullum reflexo. 
Long. 7, lat. 6 mill. 
Hab. On sand-dunes, Robbe Bay, 8. Africa (Z. ZL. 
Layard). 
Allied to H. Folint (Morelet), from W. Africa. The 
shell is pyramidal, with conical apex, seven-whorled, the 
whorls being very deeply transversely channelled just below 
the sutures and covered with a brownish epidermis. There 
are rough wrinkled lire or riblets at regular distances longi- 
tudinally crossing the whorls, the mouth being simple, with 
slight columellar marginal reflexion. 
