462 SUCCINEIDJE. 



decussatis; apertura vertical!, elliptica ; peristornate acuto, vix 

 expansiuscula. 



" LoDg. vix 9, plerumque 6 ad 7 mill. Diam. 3 mill, longa, 

 apert. exempl. majoris 4 mill." 



Hob. India: Moradabad, Kohilkhund (Bacon). 



"Animal. Tentaculis duobus filiforrnibus, obtusis, oculis 

 majoris inter tentacula sitis, proboscideque mediocri munitum ; 

 pallio labia testa3 baud transeunte; pede brevi, longitudinem 

 aperturse vix superante. 



" The form of the tentacles and the position of the eyes, 

 situated between the filiform tentacles and sessile on the head 

 (not as in Lymncea occupying the fore part of the widened base 

 of the triangular tentacles) at once distinguishes the animal from 

 that of Lymncea. In Camptoceras the eyes are large in proportion 

 to the size of the animal. Shell very local." (Benson.} 



Although the species appeared to be sufficiently plentiful when 

 first found some forty specimens being taken by Bacon and 

 Benson their subsequent searches for it proved fruitless, and it 

 is apparently rare in collections. I have not seen the species. 



460. Camptoceras austeni, H. F. Blanford. 



Camptoceras austeni, H. F. Blanford, J. A. S. B. xl, 1871, p. 40, 

 pi. 2, fig. 2 ; Hanley & Theobald, Conch. Ind. 1876, pi. 158, 

 figs. 3, 4; Nevill, Hand List, i, 1878, p. 215; Godwin-Austen, 

 Quart. Journ. Geol. Soc. London, xxxviii, 1882, pi. 5, fig. 9. 



Original description: " Testa sinistrorsa,elongato, albido-cornea, 

 epidermide tenui induta, striis spiralibus et transversis minutissime 

 obliquiter decussata. Spira elongato acuminata. Apex acutius- 

 culus. Anfractus 2, soluti. Apertura subobliqua, regulariter 

 ovalis, superne haud complanata. Peristoma integrum, con- 

 tinuum, f us co-margin at urn. 



"Alt. 3*75, diam. 1 mm. Aperturse alt. 3/6, diam. 0'9 mm." 



Halt. India : Nazirpur, Mymensing Prov., Dacca (Godwin- 

 Austen). 



" 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 C. terebra being much flattened on the inner upper 

 margin. Other differences are presented by the specimen of the 

 latter species here figured 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 C. 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 



