57 



Adams and Lamy hâve given the diagnostic characters of the genus in détail. The 

 génotype is Cticullaea concamera (Bruguière). 



I. Cuatllaea granulosa Jonas. 



1784. Arca cuculae concamerata var. Chemnitz, Conch. Cab., VII, p. 174, pi. LUI, fig. 528. 

 1846. Cucullaea granulosa Jonas, Proc. Zool. Soc. London, p. 34. 



1857. Cucullaea concamerata Deshayes (non Martini), Trait. Elém. Conch., II, p. 379, pi. XXXVI, 



figs. 12, 13. 



1858. Cucullaea granulosa Adams, H. & A., Gen. Rec. Moll., II, p. 53g. 

 1860. Cucullaea granulosa Reeve, Elem. Conch., II, p. 94. 



1869. Cucullaea granulosa Sowerby in Reeve, Conch. Icon., XVII, Cucullaea, pi. I, figs. 2a, b. 

 1869. Cucullaea gramtlosa Dunker, Cat. Mus. Godeffroy, IV, p. 114. 

 1874. Cucullaea granulosa Dunker, Cat. Mus. Godeffroy, V, p. 174. 



1891. Cucullaea granulosa and C concamerata (non Martini), Kobelt in Martini Chemn. Conch. - 



Cab. (N. F.), VIII (2), Arca, pp. 62, 228, pi. I, fig. 5, pi. V, figs. i, 2. 



1892. Cucullaea granulosa Crosse & Fischer, Journ. ConchylioL, XL, p. J^. 

 1904. Cucullaea granulosa Lamy, Bull. Mus. d'Hist. Nat. Paris, X, p. 278. 

 1907. Cucullaea gramtlosa Lamy, Journ. ConchylioL, LV, p. 306. 



1909. Arca [Cucullaea) granulosa Lynge (ex parte, non Martini), D. Kgl. Dansk. Vidensk. 

 Selsk. Skr. Nat.-Math., (7) V, p. 128. 



191 1. Cucullaea granulosa Pelseneer, "Siboga" Lamellibranchia (Anat.), pp. 10 — 12, pi. II, fig. 6; 



pi. III, figs. 7, 8. 

 1917. Cucullaea concamerata Lamy, Bull. Mus. d'Hist. Nat. Paris, XXIII, p. 112. 



I agrée with Lamy that C. gramdosa is distinct from C. concamera (Brug.) ; the différences 

 pointed out by Lamy are more or less constant and it is possible to distinguish spécimens of 

 the former from those of the latter species. 



Distribution : — Lamy has recorded C. granulosa from the Red Sea, the Gulf of Aden, 

 Singapore, China and New Caledonia. 



In the "Siboga" collection C. granulosa is represented by two odd valves from Macassar. 



Genus Limopsis Sassi. 



1827. Limopsis Sassi, Giornale Ligust. Scienz. Let. Art. Genova, I, p. 476. 

 1843. Fectu7iculina d'Orbigny, Paléontol. Française, Terr. Cret. III, p. 182. 

 1858. Pectunculina Adams, H. & A., Gen. Rec. Moll. II, p. 543. 



1912. Limopsis Lamy, Journ. ConchylioL LX, pp. 108 — 11 1. 



191 3. Limopsis Suter, Man. New Zealand Moll. p. 853. 



1925. Limopsis s. s. and Pectunculina Woodring, Miocène Mollusks from Bowden, Jamaica, 

 Pelecypods etc., p. 54. 



After a careful examination of the various Indo-Pacific species I find that the différences 

 in the sculpture, the hinge and the smooth or fluted inner margin of the shell between the two 

 subgenera, Limopsis s. s. and Pechtncttlina^ are not constant, and I hâve, therefore, thought 

 it best to unité the two together. 



The distinguishing characters of Limopsis are given by both Lamy and Woodring, and 

 I hâve nothing to add to their detailed accounts. 



SIBOGA-EXPEDITIE LlIIf. 8 



