On new Mollusca from South Africa. 103 



Fig. 7. Chactas Whymperi, sp. n. Foot of posterior limb. 



Fiy. 7 a. Ditto. Carapace from above. 



Fig. 7 h. Ditto. Immovable digit. 



Fiy. 8. Carahoctonus Keyserlingii, gen. et sp. n. Foot of posterior limb. 



Fig. 9. Bothriiirus Keyserlingii, sp. n. Last abdominal somite and first 



caudal segmeut from below. 

 Fig. 9 a. Ditto. Fifth caudal segment from below. 

 Fig. 10. Bothriurus asper, sp. n. Fifth caudal segment from below. 

 Fig. 11. Bothriurus signatus, sp. n. Fifth caudal segment from below. 

 Fig. 12. Bothriurus curiaceus, sp. n. Fifth caudal segment from below. 



PI.ATE VI. A. 



Fig. 1-3. Pho7iiocercus pictus, gen. et sp. n. Dentition of digit. 



Fig. 13 a. Ditto. Foot of posterior limb. 



Fig. 14. Urophonius Jheringii, gen. et sp. n. Dentition of digit. 



Fig. 14 a. Ditto. Foot of posterior limb. 



Fig. 15. Cercopkonius squama {Gerv.). Dentition of digit. 



Fig. 15 a. Ditto. Foot of posterior limb. 



XXT. — Descriptions of Twenty neio Species of Terrestrial and 

 Fluviatile Mollusca from South Africa. By James Cosmo 

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

 F.Z.S. 



[Plate III.] 



In tlie following paper, the seventh of a series of contribu- 

 tions towards tlie elucidation of the South-African Molluscan 

 land-fauna, we deal more particularly with new forms of the 

 genus Ennea, 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. 

 (PI. III. fig. 1.) 



//. testa ampla, profundc umbilicata, deprosso-conoidali, olivaceo- 

 cornoa, subpelliioida ; anfractibus quatuor, longitudinaliter arete 

 obliqiii-liratis, liris scricatis, anfractu ultimo rapide et effuse 

 aecrescente, ad basin la^vi, viridcsccntc nitidissimo ; apertura 

 effuso-lunari. labro simplici, ad margiucm columellarem paullum 

 reflexo. 



Long. 18, lat. 30 mill. 



Hah. Pietermaritzburg {J. F. Queketty Esq.). 



