214 Mr. W. H. Benson on new species of Helices. 



substance of the shell as the calcareous matter, which is exceed- 

 ingly thin and tender. The shell bears very much the appear- 

 ance of a large globular Vitrina, for which it has been taken ; 

 but the rough surface of the shell shows that it has been formed 

 by an animal of very different organization, and its affinities place 

 it near the singular and beautiful Helicophantoid Helices Wal- 

 toni of Ceylon, and magnifica of Madagascar. 



2. H. cacuminifera, nobis, n. s. 



T. obtecte perforata, conica, trochiformi, cornea, spira versus apicem 

 attenuata, apice papillari, obtusiusculo ; anfractibus 8, lente cres- 

 centibus, supra planatis, spiraliter lineis septem minute moniliferis, 

 lineisque intermediis minutioribus similibus munitis, ultimo acute 

 compresso-carinato, subtus convexo, polito, radiato-striato ; aper- 

 tura securiformi, peristomate acuto, labio superne lix dilatato, 

 reflexo. 



Diam. major 19, minor 16, axis 10 mill. 



Hab. in cacuminibus montium Nilgheries, teste Jerdon. 



A shell singular both in form and sculpture. The profile of 

 the spire is somewhat concave owing to the attenuation of the 

 spire towards the apex. 



3. H. crinigei^a, nobis, n. s. 



T. anguste umbilicata, depresso-trochiformi, cornea, radiato-costulata ; 

 apice obtusiusculo ; anfractibus Q-^^, vix convexiusculis, linea 

 unica elevata supersuturali munitis ; ultimo carinato, carina su- 

 turaque pilis elongatis ciliatis^ basi planiuscula, ad umbilicum com- 

 pressiuscula, lineis impressis concentricis frequentibus ornata ; aper- 

 tura obliqua angulato-lunari, securiformi ; peristomate simplici, 

 acuto. 



Diam. major 12^, minor 12, alt. 6 1- mill. 



Hab. ad latus montium "Nilgheries" versus Orientem spectans. 

 Teste Jerdon. 



This shell in size and characters is intermediate between Helix 

 Guerini, Pfr., an inhabitant of the summits of the Nilghery 

 Mountains, and H. retifera, Pfr., which inhabits the warmer val- 

 leys of the same range according to Dr. Jerdon, to whom I am 

 indebted for specimens of all the three species from the localities 

 indicated. 



4. H. acuducta, nobis, n. s. 



T. perforata, tenui, lenticulari, conica, acute carinata, superne costu- 

 lato-striata, lineis impressis confertissime granulato-decussata, sub- 

 tus laevigata, lineis impressis frequentibus concentrice notata ; spira 

 vix elevata, apice obtusiusculo ; anfractibus 5, planulatis, fere con- 

 tabulatis, ultimo subtus tumido, carina infra compressa ; apertura 



