On new Mollusca from South Africa. 103 
Fig. 7. Chactas Whymperi, sp. n. Foot of posterior limb. 
Fig. 7a. Ditto, Carapace from above. 
Fig. 7b, Ditto. Immovable digit. 
Fig. 8. Caraboctonus Keyserlingit, gen. et sp. nu. Foot of posterior limb. 
Fig. 9. Bothriurus Keyserlingii, sp.n. Last abdominal somite and first 
caudal segment from below. 
Fig. 9a, Ditto. Fifth caudal segment from below. 
Fg. 10. Bothriurus asper, sp. n. Filth caudal segment from below. 
Fig. 11. Bothriurus signatus, sp.n. Fifth caudal segment from below. 
fg. 12. Bothriurus coriaceus, sp.n. Fifth caudal segment trom below. 
Pr aTE VA A. 
Fig. 18. Phoniocercus pictus, gen. et sp. n. Dentition of digit. 
Fig. 18 a. Ditto, Foot of posterior limb. 
Fig. 14. Urophonius Jheringii, gen. et sp. n. Dentition of digit. 
Fig. 14a. Ditto. Foot of posterior limb. 
Fig. 15. Cercophonius squama (Gery.). Dentition of digit. 
Fig. 15a, Ditto. Foot of posterior limb. 
XXJ.—Descriptions of Twenty new Species of Terrestrial and 
Fluviatile Mollusca from South Africa. By JAMES Cosmo 
Metvitt, M.A., F.L.8., and Joan Henry Ponsonsy, 
B.Z.S. 
[Plate III. ] 
In the following paper, the seventh of a series of contribu- 
tions towards the elucidation of the South-African Molluscan 
land-fauna, we deal more particularly with new forms of the 
genus Lnnea, which are, critically speaking, more than usually 
attractive, presenting as they do so increasingly numerous 
an assemblage of nearly allied though apparently distinct 
species. 
1. Helix (Macrocyclis) Quekettiana, sp. n. 
(PELL ties 16) 
H. testa ampla, profunde umbilicata, depresso-conoidali, olivaceo- 
cornea, subpellucida ; anfractibus quatuor, longitudinaliter arcte 
obliqui-liratis, liris sericatis, anfractu ultimo rapide et effuse 
accrescente, ad basin levi, viridescente nitidissimo; apertura 
effuso-lunari, labro simplici, ad marginem columellarem paullum 
reflexo. 
Long. 18, lat. 30 mill. 
Hab. Pietermaritzburg (J. /. Quekett, Hsq.). 
