185 281 
Long. 5—36 mm. 
Distribution: — Singapore, low water, boring in corals (Sy. Gap), Nancowry 
(Nicobars, Mus. Zool. Hayn.), Maldive Archipelago (EpG. Smirn). — Sorong (Taprpa- 
RONE CANEFRI), Cape York (CHALLENGER). Funafuti Atoll (HEDLEY as G. lamellosa, 
Desh., and with a reference to EpG. Smiru, Challenger Lamellibr. loc. cit. HEDLEY 
adds that the Museum in Sydney has this species from Viti Isls., 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 Epa. Smirn figures in Rep. Challenger Lamellibr. (loc. cit.) under the 
name of lamellosa, Desh., does not correspond with Drsnayes’s diagnosis of lamel- 
losa; some confusion must certainly, somehow or other, have taken place, I 
scarcely think I am wrong in putting Smirn’s form as a synonym of G. gigantea, 
Desh. Ena. Suir says, in his list of the Mollusca from Aden,* regarding Gastro- 
chaena dubia, Penn., “This species undoubtedly occurs in the Red Sea (ruppellit)* 
at Singapore (indistincta, 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 Epa. Smirx 
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. 
Gastrochena cymbium, SpENGLER, Nye Saml. af d. kgl. danske Vidensk. Selsk. Skrifter, II, 1783, pp. 180 —82, 
figs. 12—17. Beschaftig. d. Berlin. Gesellsch. Naturf. Freunde, II, 1776, 
p. 569, pl. IX A, figs. 3—5. 
Chena Cymbium, — Rerzius, Diss. sist. nova testaceor. genera, 1788, p. 20. 
_ — — Skrivter af Naturhist.-Selskabet, III, 1 H., 1793, p. 24, No. 4, pl. 2, fig. 4. 
Lagenula — — Beck, MS. Mus. Univ. Hafn. 
Cucurbitula cymbia, Tryon, Proc. Acad. Nat. Sc. Philadelphia, 1861, p. 54. 
Fistulana lagenula, Lamarck, Hist. nat. d. anim. s. vert., V, 1818, p. 436, No. 4. — éd. 2, VI, 1835, p. 31, 
No. 4. 
— — = Haney, Catal. of rec. biv. shells, p. 3, pl. 13, fig. 59. 
Chena (Cucurbitula) lagenula, LAMARCK, GOULD, Proc. Boston Soc. Nat. Hist., vol. 8, 1861, p. 22. 
Gastrochena lagenula, Lamarck, SowERBy, Thesaur. Conchyl., V, 1887, p. 130, No, 24, pl. 470, fig. 18. 
1 The cave which G. dubia, Penn., forms is described and figured in: Magazin de Zoologie p. 
Guférin-MENEVILLE, 1843 (par F.CartLaup), pl. 69—71, and in: Bucquoy, DauTzENBERG et DOLLFUs, Moll. 
mar. du Roussillon, II, 1896, p. 607. 
2 Proe, Zool. Soc. London, 1891, p. 395. 
8’ Comp.: Srurany, Lamellibranchiaten d. Rothen Meeres, 1899, p. 21. 
4 As Epa. Smira apprehends this species in the Challenger-Exped. Lamellibr. 
D. K. D. Vidensk. Selsk. Skr., 7. Reekke, naturvidensk. of mathem. Afd. V. 3. 36 
