of some Species of Cyclostomacea. 203 



species belong to the same type. There is a strong line of 

 separation between the inner and outer peristome in D. diplo- 

 cheilvs, and the relief of the parietal callus above the columella 

 is a marked feature. 



Diplommatina pachycheilus, Bens., n. s. 



Testa dextrorsa, non rimata, ovato-acimiinata, Isevi, obsolete costu- 

 lato-striata, pallide cornea, translucente, nitente ; spira attenuato- 

 conica, apice obtusiusculo, siitura imj)ressa ; anfractibus 7 con- 

 vexiiisculis, antepenultimo majori tumido ; apertura verticali, late 

 auriculari, plica columellari valida, transversa, niunita ; peristo- 

 mate subduplici, sinuato, incrassato, infra sinistre angulato, callo 

 parietali expanse, appresso, margine columellari sinuato. Operc. 



Long. 4, diam. 2^ mill. 



Hal/, ad Darjiliug. Teste H. Blanford. 



This is the largest of the known Himalayan species, and, 

 judging from the single specimen received, the most modest in 

 sculpture. 



Diplommatina polypleuris, Bens., n. s. 



Testa dextrorsa, non rimata, oblongo-ovata, confertim oblique chor- 

 dato-costulata, pallide carnea, apice obtusiusculo, hyalino, sutura 

 profunda ; anfractibus (i convexis, antepenultimo tumidiusculo ; 

 apertura verticali, subcirculari, dente columellari munita ; peri- 

 stomate duplici, interiori expansiusculo, externo expanso, ad basin 

 sinistram angulato-rotundato, callo parietali mediocri, appresso. 

 Operc. ? 



Long, vix 2, diam. 1 mill. 



Hab. ad Nanclai, non raro. 



This little species was found by Mr. Theobald at Nanclai Pouji, 

 forty-five miles from Cherra, in 92° 30' E. and 25° 15' N. A 

 minute Diplommatina was also met with at Cherra, but the spe- 

 cimen sent is in such a state of decay as not to be susceptible of 

 identification and description. 



Alycaus prosectus, Bens., n. s. 



Testa mediocriter umbilicata, subcampanulato-depressa, subremote 

 striatula, striis elevatis spiralibus remotiusculis cincta, ad spatium 

 inflatum anfractus ultimi confertissime et acutissime costidata, 

 albida, versus apicem mucronatum rubella ; spira brevi, sutura 

 profunda ; anfractibus 4 convexis, subapicali exserto, vdtimo ad 

 latus pone stricturam valde gibboso, tubulum suturalem medio- 

 crem gerente, antice Iseviori ; apertura valde obliqua, circulari ; 

 peristomate simplici vel duplici, interiori duplicis expansiusculo, 

 exterior! dilatato, superne ad angulum et ad basin alato-producto. 



