The Fauna of British India, including Ceylon and Burma / edited by A.E. Shipley, assisted by Guy A.K. Marshall. Mollusca. (Freshwater Gastropoda & Pelecypoda.) / by H.B. Preston.

Date:
1915
Catalogue details

Licence: In copyright

Credit: The Fauna of British India, including Ceylon and Burma / edited by A.E. Shipley, assisted by Guy A.K. Marshall. Mollusca. (Freshwater Gastropoda & Pelecypoda.) / by H.B. Preston. Source: Wellcome Collection.

Provider: This material has been provided by London School of Hygiene & Tropical Medicine Library & Archives Service. The original may be consulted at London School of Hygiene & Tropical Medicine Library & Archives Service.

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    4 G. Hydrocena (Georissa) frustillum (Benson). Hydrooena (Georissa) frustillum (Benson), A.M. N. EL ser. 3,vi, 1860, p. 193 (as Hydrocena); Pfeiffer, Mon. Pneum. m, p. H. & T., 0. I. pi. 117, fig. 5 (as Hydroccena). Original description :— Testa imperforate, ovato-oblonga, solidi- uscula, spiraliter confertissime tenuisulcata, succinea?; spira subpyi'ainidata, apice obtnsiusculo, sutura impressa; anfractibus 5, convexis, ultimo £ testas subsaquante ; apertura obliqua, truncato- ovata, superne necnon ad latus sinistrum angulata, penstomato tenui, non coutinuo, pariete calloso. Operc. — ? Alt. 2-5, diam. 1*76 mm. Hab. Ava. Differing from (?. tZfae (Benson), in the absence ot the very elongate slender spire of that species, in the want of an umbilicus, and in the form of the aperture, which presents internally au angle at the junction of the columellar lip. 7. Hydrocena (Georissa) rawesiaiia (Benson). Hydrocena (Georissa) rawesiana (Benson), A. M.N. H. ser. 3, vi, 1860, p. 193 (as Hydrocena); Pfeiffer, Mon. Pneum. m, p. 252; Theobald & Stoliczka, J. A. S. B. xli, 1872, pt. 2, p. 332 ; H. & T., C. I. pi. 117, fig-. 6 (as Hydroccena). Original description ■—Testa imperforata, subgloboso-conica, solida, confertim spiraliter striata, luteo-albida; spira conica, apice obtuso, sutura prol'undiuscula; • anfractibus 4, valde convexis ultimo spiram subsequante ; apertura vix obliqua, semicirculan, superne et ad latus sinistrum angulata, peristomate tenui, margine parietali calloso, intus recto, stricto ; loco umbilicali subfoveato. Operc. — ? Alt. 2, diam. P5 mm. Hab. Near Moulmein in the Farm Caves. The shell is more globose than that of H. pyxis, Benson, and the sculpture is altogether different. In the formation of the aperture there is an approach to that of H. frustillum, but it exhibits a straight knife-like edge at the internal parietal margin. 8. Hydrocena (Georissa) blanfordiana, Stoliczka. Hudrocena (Georissa) blanfordiana, Stoliezka, J. A.S. B. xl, 1871, pt. 2, pp. 157-158, pi. 6, fig. 6 ; xli, 1873, pt. 2, p. 332 ; H. & T., C. I. pi. cxvii, fig. 2 (as Hydrocana). Original description:—Testa globoso conoidea, imperforata, moderate solidula, luteola, apice rubescente, mammillato laevissimo; anfractibus 3k, convexiusculisx transversaliter striis incrementi minutis tectis, sublamgatis ; ultimo ad peripheriam rotundato, in altitudine spiram suba?quante ; apertura late semilunari; labro,