88 McsPii-s. J. C. Mclvill and J. IT. Ponsonby on 



habitat of this little species, of wliicli there are three speci- 

 mens, two being liardly full-grown, and consequently smaller 

 than that selected for the type. It falls under the " bisculpla " 

 section of Pellci^ considered typical in Tryon's Manual, while 

 it is there mentioned that the name ^^ Sheldonia''^ has been 

 employed by Anccy (1887) for such species as natalensis, 

 Trotteriana, and cotyledonis. 



H. rhysodes is thin, horny, fuscous, five-whorled, with white 

 oblique lirre longitudinally crossing, somewhat irregularly, 

 there being here and there small spaces left quite clear and 

 free ; and the shell presents a wrinkled appearance in conse- 

 quence. The umbilicus is deep, but narrow ; mouth lunar- 

 ovate, lip a little rctlexed at the columellar margin. 



3. Helix [PeJla) tuguriolum, sp. n. (PL V. fig. 5.) 



//. testa obtecte umbilicata, tenui, albo-cornea, subplauata, infra 

 ventricosa ; anfractibus quinque, longitndinaHter indistinctissirae 

 striatis, trausversim tenuiter ot minute concentrico-decussatis ; 

 apertura bmari-ovata : peristomate simplici, ad marginem colu- 

 mellarem paullo rcflcxo. 



Long. G (sp. majoris), lat. 8"50 mill. 



Tlah. " S. Africa" [E. L. Layard). 



Three specimens, of which two are perfect. A plain, 

 smoothish, horny shell, bearing indistinct lines of longitudinal 

 ribbing (when closely examined witli a lens), very minutely 

 decussated by spiral striae. Allied to H. Lovdni (Krauss), 

 represented by only a poor specimen in the National Collec- 

 tion, South Kensington, from which this species seems to 

 differ chiefly in the absence of any keel at the periphery, and 

 likewise in there being no sign of ej)idermis, which in //. 

 Z/Ot"^?^ 2* adheres to the ribs and renders them more conspicuous . 



4. Helix [Pella] erafeina, sp. n. (PI. V. fig. 3.) 



77. testa proftmde scd angusto umbilicata, louticulari, dcprcsso- 

 conica ; anfractibus quinque, cincreis, iindique oonfortim costulis 

 laracllosis rcgidaribus oblique ciuctis, flaminisiiuc rufis longitu- 

 dinalitor docoratis, ad suturas quasi-crcnulatis, anfractu ultimo 

 apud pcriphcriam serri-carinato ; apertura subquadrata : peristo- 

 mate simplici, ad marginem columellarem pauUum rotlexo. 



Long. 2-:2.">, lat. '3 mili. 



iJab. Bredasdorp, in sand under stones ; and Caj)e Point 

 [E. L. Layard). 



A most elegant and beautiful little shell, found, as noticed 

 above, by Mr. Layard in two localities ; we have taken the 



