40 H. F. Blanford— 0» Camptoceras, Sfc [No. 1, 



Camptoceras Austeni, nov. sp. PL II, fig. 2. 



Testa sinistrorsa, elongata, albido cornea, epidermide tenui in- 

 duta, striis spiralibus et transversis minutissime obliquiter decus- 

 sata. Spira elongato acuminata. Apex acutiusculus. Anfractus 

 2, soluti. Apertura subobliqua, regulariter ovalis, superne baud 

 complanata. Peristoma integrum, continuum, fusco-marginatum. 



Alt. 3.75, diam. 1 mm. — Aperturse alt. 1.6, diam.0.9 mm. 



Cepit Major H. H. Godwin- Austen herbee adhserentem, margine 

 desiccato lacus, heel dicti, apud Nazirpur haud procul a Shushong, 

 provincife Mjmensing, patriae Bengaliee. 



In form this species closely resembles C. terebra, Bens., but is 

 distinguished by its much smaller size, the smaller number of 

 its whorls, and especially the regular oval form of its aperture ; that 

 of G. terebra being much flattened on the inner upper margin. 

 Other differences are presented by the specimen of the latter species 

 here figured, (fig. 1) and which I received some years since from 

 the late Mr. Benson. The aperture of C. terebra is equal to more 

 than half the length of the shell, while that of C. Austeni is less 

 than half the same length ; the proportions in the former case, as 

 determined by accurate measurement, being 53 per cent., in the 

 latter 42 per cent. My specimen of O. terebra is probably not full 

 grown, since it has but 2£ whorls, and the margin of the peristome 

 is sharp, unlike that of the specimens both of C. Austeni and the 

 following species. All the specimens of these exhibit a thicken- 

 ing of the epidermis around the peristome, which I consider 

 characteristic of the full grown shell. C. Austeni would appear to 

 be rare at the locality, since only five specimens were found among 

 a large number of the following species. It is possible, however, 

 that it may have been overlooked, owing to its smallness. 



Camptoceras ? lineatum, nov. sp. PI. II, fig. 3. 



Testa elongate ovata, sinistrorsa, albido cornea ; epidermide 

 tenui induta ; lineis elevatis, fuscis, aequidistantibus, spiralibus or- 

 nata ; interspatiis minute decussatis. Spira valde exserta. Apex 

 acutiusculus. Anfractus 2& } approximati, attingentes ; ultimus pone 

 aperturam omnino solutus. Apertura subobliqua, ovalis, superne 



