1866.] DR. J. C. COX ON NEW AUSTRALIAN LAND-SHELLS. 373 



considerably less so than the true B. cafer with which it associates. 

 He considers the two to be decidedly distinct ; and one of his two 

 specimens is from the Galla country, the other from the White Nile. 

 In my collection of drawings I have found a characteristic repre- 

 sentation, taken from the living animal, of the cow of Bubalus bra- 

 chyceros, Gray, the great-eared Buffalo of Western Middle Africa. 



Bubalus braehyceros. 



This animal was from the Foulah country, north of Sierra Leone, 

 where the species is abundant. It was met with by Capt. Clapperton 

 in the vicinity of Lake Tchad, and more recently by M. du Chaillu. 

 The colouring of the species much resembles that of the Red River- 

 Hog (Potamocheerus penicillatus, Gray) of the same region. 



5. Characters of Six New Australian Land-Shells. 

 By James C. Cox, M.D., Corr. Memb. 



Helix porteri, mihi. M.C. 



H. testa profunde et subobtecte umbilicata, depresso-circulari, 

 tumidiuscula, tenui, rubida, sub lente obsolete plicato-striata, 

 minutissime granulata setisque brevissimis confertim bullata ; 

 spira obtusa ; anfractibus quatuor et semisse (4\), convexius- 

 culis, ultimo tumido, ad os constricto ; apertura subquadrato- 

 lunari ; peristomate tenui, expanso, rejlexo, intus albido, unibi- 

 licum semitegente. 



Diam. maj. 0*75, min. 0*63, alt. 0*50 unc. 



Hab. Upper Clarence River, at Guy Faux Station (Porter) ; Upper 



