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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    (JYKENIl)jli. Mactra, Brongniart, .Mem. Vincent, 1823, p. 81, pi. 5, tig. 8. Gelonia, Gray, Synop. Brit. Mus. 1814, p. 75. Qyrena, Prime, Oat. Corbiculidss, 1869-70, p. 141; Clessin, in Martini & Chemnitz, 1879, p. 101. Type, Cyrena ceylonica (Chemnitz) ; Ceylon. llanye. Tropical and subtropical regions of Asia, Africa, Oceania and Australia. Shell oval or subtrigonal, rather convex, solid, covered with a periostracum generally of a brownish-green or yellow hue; each valve bearing three somewhat divergent cardinal teeth ; the right valve bearing four unequal short lateral teeth, of which the anterior are more nearly situate to the cardinals than the posterior, and the outer smaller than the inner ; the left valve bearing but two lateral teeth, one anteriorly and one posteriorly ; pallial line generally entire. Animal with very short siphons, large, compressed, trigonal foot, gills of unequal size, and triangular labial palpes. 325. Cyrena ceylonica (Chemnitz). Venus ceylonica, Chemn. in Martini & Chemnitz, vi, 1782, p. 833, pi. 32, fig. 336. Venus coaxccns, Gmelin, Syst. Nat. 1788, p. 3278, fig. 336. Cyclas zeylanica, Lamarck, Ann, Mus. Hist. Nat. vii, 1806, p. 420. Cyrena zeylanica, Lamarck, An. sans Vert, v, 1818, p. 554; Prime, Cat. Corbiculicte, ] 868, p. 6. Cyrena ceylonica, Lamarck, Prime, Cat. Corb., 1869-70, p. 143, Gen. Cyrena, no. 12; Clessin, in Martini & Chemnitz, 1879, pp. 102-103, pi. 17, figs. 1 & 2, pi. 18, figs. 1 & 2. Cyrena ceylanica, Sowerby, Conch. Icon, xx, 1878, pi. 19, sp. 11. Shell large, solid, subtrigonal, subcompressed, high, subequi- lateral, covered with a thin, yellowish epidermis, with fringed strise: posterior side obtusely two-angled, rather concave in front of the anterior angle; flattened, much sloped behind the posterior angle; anterior side rather short, latero-dorsal flattened, sloped. (Soiverby.) Hob. Ceylon. The dimensions here given are those of three specimens in the British Museum Collection :— Long Lat Diam 326. Cyrena impressa, Desluujes. Cyrena imjjressa, Deshayes, P. Z. S. xxii, 1854, p. 18; Cat. Brit. Mus. 1854, p. 249. Original description :—Testa ovato-subcirculari, obscure sub- quadrangulari, valde inaequilaterali, turgida, mediocriter crassa; 1. 2. 3. 62 51 47 mm. 65 50 48-5 mm. 35-5 27-25 27 mm.