58 SMITH : LAND SHELLS FROM SOMALILAND. 



The colour of this species, described by Bourguignat as '^candido- 

 sublutescens," is variable. Some specimens are pure white, but the 

 majority are transversely lineated with brown upon the upper surface, 

 two of the lines at the periphery being of a darker tint and thicker 

 than the rest. The apical whorls are often yellowish or livid, having a 

 dark line just above the suture. One specimen has the upper surface 

 of an almost uniform brownish colour, becoming gradually paler 

 beneath. A little variation in form is noticeable, some examples 

 having the spire more elevated than others and the body-whorl higher 

 or more ventricose. The umbilicus in adult shells is nearly always 

 concealed by a callus, but in one specimen which has the appearance 

 of maturity, it is only partly covered. There is not much variation in 

 the sculpture, but considerable difference in size is observable, the 

 largest specimen being 25 millim. in its greatest diameter, whilst the 

 smallest example, evidently adult, is only 16. 



With regard to the specific distinctness of this so-called species, I 

 must confess that it is scarcely separable from guillaini, Petit, also 

 a Somali form. The latter is somewhat larger and has a more elevated 

 spire, but otherwise is very similar. The supposed .specific differences 

 in M. Bourguignat's Georgia naticopsis, G. perrieri, and G. revoili are 

 far beyond the ken of such an ordinary person as the writer, and, I 

 may add, beneath the notice of such experts as Kobelt and 

 Moellendorff who entirely disregard these names in their " Catalnrj 

 der gegenicdrtig lehend hekannten Pneumonopumeii." 



3.— Ennea somaliensis, n. sp. 



Testa cylindracea, alba, anguste rimata, oblique tenuissime con- 



fertim lirata, liris supra ad suturam denticulatis ; spira cylindrica, 



superne obtusa, vix conoidea ; anfractus 8, lente accrescentes, duo 



supremi pellucidi, laeves, duo sequentes convexiusculi, caeteri minus 



convexi,sutura vix obliqua sejuncti, ultimus penultimo angus- 



tior, pone labrum bi-scrobiculatus vel indentatus ; apertura 



sex-dentata ; peristoma album, expansum, reflexum, mar- 



ginibus callo tenui junctis ; dens unicus parietalis lamelli- 



formis, concavus, ad insertionem labri situs, dentes duo 



in^equales in margine dextro, unicus basalis, alius minimus 



ad basin columellse, sextus columellaris validus. Longit. 



8^ millim., diam. 3|. Apertura cum perist. 3 longa, 2\ lata. 



Hah. — Ganlibah Goles Range, 5900 feet. 



A very delicately costulate species, the upper ends of the fine 

 closely packed costulse forming a very pretty minutely denticulate 

 suture. In one specimen, rather more slender than the type, the 

 second tooth within the outer lip is almost obsolete. 



