634 MB. E. A. SMITH ON LAND AND FEESHWATER [NoV. 7, 



indentatus ; apertura irregularis, loncjit. totius ^g- suhcequans, 

 dentibus quinque alhis (uno jiarieUdi lamelUformi valde jjronii- 

 nente, uno columellari crasso ceque promiyiente, tertio infra colu- 

 mellarem minimo, quarto et quinto intra lahruni sitis, quinto 

 hidentato) munita ; peristoma album, leviter expanswm et incras- 

 satum. 

 Longit. Sf millim., diam. 4; apertura 2k longa. 

 Hob. Karonga, west shore of Lake Nyasa {R. Craioshay). 

 This species exhibits scarcely any trace of sculpture. The iu- 

 deutation on the body -whorl behind the lip indicates the position 

 of the labral teeth. The upper one of these is planted somewhat 

 obliquely and is distinctly bipartite. The parietal lamella is thiu, 

 hollowed out or concave on the right side or towards the labrum, 

 which it practically touches at the upper extremity. 



3. Helix (Pella) whytei. (Plate LIX. i]gs. 3, 4.) 



Testa depresse glohosa, anguste perforata, tenuis, jlavo-viresccns, 

 superne vix nitida, infra polita ; anfractus 5|, subccleriter 

 crescentes, convexi, lineis incrementi oblique arcuatis scidpti ; 

 spira brevis, conica, ad apicem sidjobtusa; anfr. ultimus 

 magnus, ad periplieriam rotundatus ; apertura late lunaris, 

 parum obliqua ; sutura mediocriter profunda, anguste m,arginata ; 

 peristoma undique tenue, supra umbilicum breviter rcflexum. 

 Diam. maj. 20 millim., min. ^ 6| ; alt. 13. 



Ilab. Fort Johnston, tipper Shire River. (Collected by Mr. A. 

 Whyte.) 



Allied to Pella arnotti, Benson, but more globose and without 

 the minute spiral striation on the upper surface. 



All the specimens, about thirty, have been collected without the 

 living animal, and in this condition most of them have the spire 

 more or less bleached. In addition to the lines of growth, occa- 

 sionally a few spiral lineations are observable, and a few small 

 malleations or indentations make the upper surface more or less 

 uneven. 



4. LiviNHACiA nilotica, PfeifEer. 



Hob. Angoni-Laud, south-west of Lake Nyasa (A. Whyte): 

 Itawa, west of Lake Tanganyika (R. Crawshay), 



This species has a wide range, extending from the White NQe 

 district along the lake-region as far south as the southern end of 

 Nyasa, a distance of from fifteen to eighteen hundred miles. It 

 varies considerably in form. 



5. BcLiMiNus (Eachis) STiCTtJS, Marteus. 



Hab. Angoni-Land {A. Whyte). Tette, Mozambique {Martens). 

 A single typical example. 



6. LiMIOOLAEIA MARTBNSIANA, Smith. 



Hab. Sumbu, Itawa, S.W. of Tanganyika {R. Craivshay). 



