136 



1905. Pinna nigra Hidalgo, Cat. Filip., p. 370. 



1906. Pinna nigra Lamy, Bull. Mus. d'Hist. Nat. Paris, XII, p. 313. 



1906. Pinna [Atrina) nigra and P. {A.)vexillum Melvill & Standen, Proc. Zool. Soc. London, p. 806. 

 1906. Pinna {Atrina) nigra Standen & Leicester, Ceylon Pearl Oyster Rept., V, p. 290. 

 1906. Pinna nigrina Owston, Japan. Loochooan Shells, p. 34. 

 Î909. Pinna [Atrina) nigra Lamy, Mém. Soc. Zool. France, XXII, p. 340. 



1909. Pinna [Atrina] nigrina Melvill, Trans. Linn. Soc. London (Zool.), XIII, p. 125. 



1910. Pinna nigra Hedley, Austral. Ass. Adv. Sci., XII, p. 344. 



191 I. Pinna nigra Pelseneer, "Siboga" Lamellibranches (Anat.), p. 27. 



191 7. Pinna nigra Odhner, Kungl. Sv. Akad. Handl., LU, N°. 16, p. 16. 



1919. Pinna nigra Odhner, Ark. Zool., XII, N". 6, p. 3. 



1924. Atrina nigra Hedley, Rec. Austral. Mus., XIV, p. 151. 



1925. Atrina vexilluni Oostingh, Comm. Geol. Inst. Agri. Univ. Wageningen, p. 242. 

 1929. Pinna vexilluin Winckvvorth, Proc. Malacol. Soc. London, XVIII, p. 287. 

 1929. Pinna nigra Dautzenberg, Faun. Colon. Français., III, Fasc. 4, p. 568. 



The synonymy of this species was recently worked out by Winckworth, and I agrée 

 with his results. P. (A.) vexillum is a fairly variable species, and smooth or spinous forms 

 occur indiscriminately. 



Distribution: — ■ P. {A.) vexilhciu bas a wide range in the Indo-Pacific and the Red Sea. 

 For détails as to localities référence may be made to Winckworth's paper. 



In the "Siboga" collection it is represented by shells from /\nchorage off Seba, Savu 

 (St. 58); Kambaragi Bay, Tanah Djampeah (St. 64), Tuai Anchorage, Kei Islands (St. 258) 

 and Dobo, hx\\ Islands (St. 272). 



2. Pinna {^Atrina) strangei Reeve. (Plate IV, figs. 11 — 13). 



1858. Pinna strangei Reeve, Conch. Icon., XI, Pinna, pi. XXVII, fig. 52. 



1858. Pinna liystrix and P. strangei Hanley, Proc. Zool. Soc. London, pp. 226, 254. 



1859. Pinna hystrix Reeve, Conch. Icon., XI, Pinna, pi. XXXII, figs. 60, 61. 



1860. Pinna Iiystrix and P. strangei Reeve, Elem. Conch., II, p. 69. 

 1870. Pinna hystrix MacAndrew, Ann. Mag. Nat. Hist., (4) VI, p, 449. 

 1877. Pmna hystrix Pagenstecher, Kossmann Roth. Meer. Mollusk., p. 30. 

 1886. Pinna strangei von Martens, Ann. Mag. Nat. Hist., (3) XVII, p. 86. 

 1886. Pinna hystrix Cooke, Ann. Mag. Nat. Hist.,, (5) XVII, p. 137. 



1890. Pinna strangei Clessin, in Martini-Chemn. Conch. -Cab. (N. F.), VIII (I) Malleacea, p. 70. 

 190 1. Pinna hystrix Sturany, Denkschr. Kais. Akad. Wiss. Wien (Math. -Nat.), LXIX, p. 289. 

 1909. Pinna hystrix Lynge, D. Kgl. Dansk. Vidensk. Selsk. Skr. Nat. -Math., (7) V, p. 148. 

 1924. Atrina strangei Hedley, Rec. Austral. Mus., XIV, p. 152, pi. XX, fig. 10. 

 1929. Pinna [Atrina) strangei Winckworth, Proc. Malacol. Soc. London, XVIII, p. 289. 



As Hedley pointed out "the vermiculate sculpture of the ventral limb contrasting with 

 the sharp even radiais of the rest of the disk and the proportion of height to length furnish 

 good récognition marks" of the species. 



Distribution : — P. [A.) strangei is known from such widely separated areas as the 

 Red Sea on the one hand, to Siam, Amboina and Australia on the other. 



The "Siboga" Expédition collected a good séries of spécimens from Kambaragi Bay, 

 Tanah Djampeah (St. 64), Pulu Sanguisiapo, Tawi Tawi Islands, Sulu Archipelago (St. 93), 

 Anchorage off Sawan, Siau Island (St. 125), Anchorage off Beo, Karakelang Islands (St. 131), 

 Anchorage between Gisser and Ceram Laut (St. 172), Sanana Bay, east coast of Sula Besi 



