1909- Ostrea [Alectryonia] crista-galli Melvill, Trans. Linn. Soc. London (Zool.), XIII, p. 126. 



19 10. Ostrea cristagalli Hedley, Austral. Ass. Adv. Sci., XII, p. 345. 



1911. Ostrea cristagalli Pelseneer, "Siboga" Lamellibranches (Anat.), p. 27. 



1924. Ostrea crista-galli Lamy, Bull, Mus. d'Hist. Nat. Paris, XXX, p. 317. 



1925. Ostrea crista-galli Lamy, Bull. Mus. d'Hist. Nat. Paris, XXXI, p. 256. 



1928. Ostrea crista-galli Faustino, Summary Philippine Mar. Freshw. Moll. p. 28. 



1929. Ostrea crista-galli Cox, Proc. Malacol. Soc. London, XVIII, p. 181. 



1929. Ostrea [Lopha) crista galli Dautzenberg, Faun. Colon. Français., III, p. 556. 



1929. Ostrea cristagalli Lamy, Journ. Conchyliol., LXXIII, p. 254. 



1930. Ostrea cristagalli and 0. townshendi (sic) Cox, Mon. Geol. Dept. Hunterian Mus. Glasgow 



Univ., W. 4, p. 128, pi. XIV, fig. 27. 



O. (Z.) crista galli is a very characteristic species, and is easily distinguished from the 

 other allied forms. From an examination of several spécimens of O. townsendi Melvill from the 

 Persian Gulf, I hâve no doubt that this species is synonymous with O. [L.) crista galli. 



Distribution ; — O. (Z.) crista galli is widely distributed in the Indo-Pacific, the Persian 

 Gulf and the Red Sea. Smith's record of the species from St. Helena is, as the author remarked, 

 based on Jeffrey's record of the species from that area, and is open to doubt. 



The "Siboga" Expédition collected a single young shell of this species at Banda 

 Anchorage (St. 240). 



Family Pinnidae. 

 Genus Pinna Linn. 



1758. Pinna Linnaeus, Syst. Nat., (éd. X), p. 707. 



1895. Pinna Dali, Trans. Wagner Free Inst. Philadelphia, III, p. 659. 



1925. Pinna Woodring, Miocène Mollusks from Bowden, Jamaica, Pelecypods etc., p. 56. 



1929. Pinna Winckworth, Proc. Malacol. Soc. London, XVIII, pp. 276 — 283. 



1930. Pinna Stewart, Spécial Publication Acad. Nat. Sci. Philadelphia, N" 3, p. 132. 



For a detailed discussion of the characters and classification of the Genus Pinna référence 

 may be made to Winckworth's valuable contribution cited above. Good accounts of the 

 subgenera are also to be found in Woodring's paper. 



The type of the genus Pinna and subgenus Pinna s. s. is Pinna rtidis Linn. 



In the "Siboga" collection the genus is represented by ail the three subgenera, Pinna s. s.., 

 Atrina Gray and Streptopinna von Martens. 



I. Pinna {Pijtna) atropurpurea Sowerby. 



1825. Pinna atropurpurea Sowerby, Cat. Tankerville, Appendix, p. 5. 



1843. Pinna atropurpurea Hanley, Rec. Biv. Shells, p. 225. 



1846. Pinna atroptirpiirea Hanley, Rec. Biv. Shells, pi. XXIV, fig. 36. 



1852. Pinna trigonuni Dunker, Zeitschr. MalakozooL, IX, p. 60. 



1858. Pinna Philippinensis, P. electrina, P. Zebnensis, P. fianata, ? P. niadida, P. miitica, 

 P. eiiglypta, P. atropurpurea^ P. vespertina, } P. virgata (non Menke), P. angîtstana 

 and P. regia Reeve, Conch. Icon., XI, Pinna, pi. XI, fig. 20 ; pi. XIV, figs. 25, 26; 



pi. XV, fig. 27; pi. xvn, fig. 31; pi. XVIII, fig. 34; pi. XX, fig. 37; pi. XXII, 



fig. 41; pi. XXIII, fig. 44; pi. XXIV, fig. 45; pi. XXVU, fig. 51 ; pi. XXX, fig. 56. 

 1858. Pinna regia Hanley, Proc. Zool. Soc. London, p. 227. 



