185 281 



Long. 5—36 mm. 



Distribution: — Singapore, low water, boring in corals (Sv. Gad), Nancowry 

 (Nicobars, Mus. Zool. Havn.), Maldive Archipelago (Edg. Smith). — Sorong (Tappa- 

 RONE Canefri), Cape York (Challenger). Funafuti Atoll (Hedley as G. lamellosa, 

 Desh., and with a reference to Edg. Smith, Challenger Lamellibr. loc. cit. Hedley 

 adds that the Museum in Sydney has this species from Viti Isis., New Caledonia, 

 Moreton Bay (Queensland) and St. Vincent's Gulf, Lord Hood's Isl. and Mangareva 

 (Lamy). 



The specimens from Singapore were found in coral, in which they had made 

 a bottle-shaped hole which was smooth interiorly, and only the narrow part of it 

 which leads to the exterior is partially lined with a thin layer of chalk.' The 

 form which Edg. Smith figures in Rep. Challenger Lamellibr. (loc. cit.) under the 

 name of lamellosa, Desh., does not correspond with Deshayes's diagnosis of lamel- 

 losa; some confusion must certainly, somehow or other, have taken place, I 

 scarcely think I am wrong in putting Smith's form as a synonym of G. gigantea, 

 Desh. Edg. Smith says, in his list of the Mollusca from Aden,- regarding Gastro- 

 chaena dubia, Penn., "This species undoubtedly occurs in the Red Sea (ruppellii)^ 

 at Singapore (indistimia, Desh.) and the Philippines (lamellosa, Desh.).^ On com- 

 paring the types of the three Deshayesian species with specimens of G. dubia, I 

 fail to discover any essential differences." I do not quite agree with Edg. Smith 

 in this; G. gigantea from the Gulf of Siam and from Singapore differs from G. dubia, 

 Penn., in the stronger and more prominent longitudinal striation over its whole 

 surface, and gigantea attains a larger size than G. dubia, which has been recorded 

 to reach only about 20 mm. 



Gastrochaena cymbium, Spengl. 



Gastrochœna cynihiiim, Spengler, Nye Saml. af d. kgl. danske Vidensk. Selsk. Skrifter, II, 1783, pp. 180— 82, 



figs. 12—17. — Beschäftig, d. Berlin. Gesellsch. Naturf. Freunde, II, 1776, 

 p. 569, pi. IX A, figs. 3-5. 

 Chœna Cymbium, — Retzius, Diss. sist. nova testaceor. genera, 1788, p. 20. 



— — — Skrivter af Naturliist.-Selskabet, III, 1 H., 1793, p. 24, No. 4, pi. 2, fig. 4. 



Lagenula — — Beck, MS. Mus. Univ. Hafn. 



Cucurbitala cgmbia, — Tryon, Proc. Acad. Nat. Sc. Philadelphia, 1861, p. 54. 



Fistulana /ajenu/a, Lamarck, Hist. nat. d. anim. s. vert., V, 1818, p. 436, No. 4. — éd. 2, VI, 1835, p. 31, 



No. 4. 

 — — — Hanlev. Catal. of rec. biv. sliells, p. 3, pi. 13, fig. 59. 



Chœna {Cuciirbitnla) lagenula, Lamarck, Gould, Proc. Boston Soc. Nat. Hist., vol. 8, 1861, p. 22. 

 Gastrochœna lagenula, Lamarck, Sowerby, Thesaur. Conchyl., V, 1887, p. 130, No. 24, pi. 470, fig. 18. 



' The cave which G. dubia. Penn., forms is described and figured in: Magazin de Zoologie p. 

 GuÉHiN-MÉNEViLLE, 1843 (par F. Caillaid), pi, 69 — 71, and in: Bucquoy, Dautzenberü et Dollfus, Moll, 

 mar. du Roussillon, II, 1896, p. 607. 



- Proc. Zool. Soc. London, 1891, p. 395. 



= Comp.: Sturany, Lamellibranchiaten d. Rothen Meeres, 1899, p. 21. 



* As Edg. Smith apprehends this species in the Challenger-E.xped. Lamellibr. 



UK n. Viilensk. Selsk.Skr., 7. RæliUe, niiturvidensli. oK matheni. AW. V. 3. 3(i 



