426 Mr. W. H. Benson on Indian and 



carination, and umbilical radiate costulation at once prove its 

 proper place. 



3. Cyathopoma{?) tignarium, B. 



C. testa minuta, umbilicata, turbinato-conica, liris spiralibus subtus 

 confertioribus cincta, oblique striatula, sub epidermide luteo-fusca 

 albida ; spira conica, apice obtusiusculo, sutura profund.i ; anfrac- 

 tibus 5, valde convexis, ultimo cylindrico ; apertura vix obliqua, 

 circulari ; peristomate continuo, simplici, recto, acuto, ad anfrac- 

 tum penultimum breviter adhaerente. Operculo calcareo, medio 

 anguste concavo, nigrescente, polito, margine lato planato, arctis- 

 sime spirali. 



Diam. 2, alt. 2^ mill. 



Habitat in insulis Andamanicis. 



A single specimen, forwarded by Mr. W. ITieobald, is deficient 

 in the double peristome observable in the typical species of Mr. 

 W. T. Blanford^s group, Cyathopoma filocinctum, Bens., and 

 C. Malabaricum, Blanf. The operculum has not attained the 

 singular development of the margin exhibited in the Nilgherry 

 shells and in a new species found by Mr. Blanford on the Bhore 

 Ghat, near Khandalla, one specimen of which, however, with an 

 immature operculum, received from the discoverer, has a ten- 

 dency to the formation presented by the operculum in the 

 Andaman species. 



My description of the operculum of C. filocinctum, recorded 

 in the paper on Opisthoporus published in the 'Annals' for 

 January 1855, p. 16 (" Operculo extus concavo ; anfractibus 

 paucis, margine scabre elevato"), indicates a more advanced, 

 but not the full development of the operculum first observed by 

 the Messrs. Blanford. 



4. Pupa bathyodon, B. 



P. testa profunde rimato-perforata, ovato-conica, oblique striatula, 

 fusco-cornea, translucente ; spira conica, apice obtuse, sutura 

 subprofunda ; anfractibus 5, convexis, ultimo antice asceudente 

 circa umbilicum excavatum compressiusculo ; apertura quadrato- 

 ovata, marginibus expansis subreflexis concoloribus callo parie- 

 tali expanso superne junctis, 4-dentata, dente parietali 1 intrante 

 raajore, palatalibus 2 minutis remotiusculis, columellari 1 pro- 

 fun do. 



Alt. 3, diam. 2 mill. 



Habitat ad Teluk Sendur, prope Hoshungabad, non procul a flumine 

 Nerbudda. Detexit W. Theobald, jun. 



5. Pupa Planguncula, B. 



P. testa perforata, elliptico-cylindrica, oblique striatula, striis an- 



fractus ultimi et prope suturam magis conspicuis, non nitente, 



albida ; spira oblonga, versus apicem obtusum convexa, sutura 



subprofunda, margine crenulato ; anfractibus 6, convexis, ultimo 



