91 



iSgo. Avicula coturnix Paetel, Cat. Conch. Samm., III, p. 202. 



1895. Pteria coturnix Pilsbry, Cat. Mar. Moll. Japan, p. 146. 



191 1. Avicula coturnix Pelseneer, "Siboga" Lamellibranches (Anat.), p. 24, pi. VIII, fig. 6. 



Pteria cotiLr^iix is a small species with a thin, somewhat oblique and inequivalve shell. 

 From allied species it is easily distinguished by its umbonal area, which projects markedly in 

 front of the hinge-line. The shells vary greatly as to their colour and outline. 



Distribution : — The species had hitherto been recorded from the seas of Japan only. 



In the "Siboga" collection it is represented by a number of shells from St. 95 (5° 43^5 N., 

 ii9°4o'E.; 522 mètres), Anchorage off North Ubian (St. 99, 6°7'.5N., i20°26'E.), St. 164 

 (i°42'.5 S., i30°47'.5 E.), Tuai Anchorage, Kei Islands (St. 258) and mid-channel in Solor-strait 

 off Kampong Menanga (St. 305). 



2. Pteria zébra (Reeve). 



1857. Avicnla zébra Reeve, Conch. Icon., X, Avicnla, pi. XI, fig. 36. 



1860. Avicula zébra Reeve, Elem. Conch., II, p. 64. 



1879. Avicula zébra Dunker in Martini Chemn. Conch.-Cab. (N. F.), VII, (3), Avicula, p. 60, 



pi. XXI, fig. 3. 

 1884. Avicula zébra Smith, Rept. Voy. "Alert", p. 113. 

 1890. Avicula zébra Paetel, Cat. Conch. Samm., III, p. 204. 

 1897. Avicula zébra Sowerby, Mar. Shells S. Africa, Suppl., p. 27. 

 1901. Pteria zébra Tate and May, Proc. Linn. Soc. N. S. Wales, XXVI, p. 439. 

 1903. Electroma zébra Smith, Faun. Geogr. Maldive, Laccadive Archipel., II, p. 623. 



1905. Avicula zébra Hidalgo, Cat. Filip., p. 367. 



1906. Avicula zébra Standen and Leicester, Ceylon Pearl Oyster Rept., V, p. 289. 



1909. Pteria zébra Lynge, D. Kgl. Dansk. Vidensk. Selsk. Skr. Nat.-Math., (7) V, p. 142, 



pi. II, figs. 16—18. 



19 10. Pteria zébra Hedley, Austral. Ass. Adv. Sci., XII, p. 344. 



191 1. Avicula zébra Pelseneer, "Siboga" Lamellibranches (Anat.). p. 24. 



1917. Pteria [Electroma) zébra Odhner, Kungl. Sv. Akad. Handl., LII (N". 16), p. 16, pi. I, fig. 6 — 8. 



Distribution: — This sp'ecies has a wide range of distribution in the Indo-Pacific; it has 

 been recorded from the Maldives, the Gulf of Manaar, the Gulf of Siam, Port Elizabeth, Pearl 

 Banks of Cape Jaubert, Oueensland and Tasmania. 



In the "Siboga" collection it is represented by two young valves taken at Anchorage 

 South coast of Timor (St. 285, 8°39^i S., i27°4'.4E.). Both the shells show narrow brown 

 lines on a whitish gray background similar in pattern to the spécimen from Lytocarpus figured 

 by Odhner (loc. cit., fig. 6). 



3. Pterea lata (Gray). 



1845. Avicula lata Gray in Eyre, Discoveries in Central Australia, I, p. 435, pi. VI, fig. i. 



1849. Avicula serrulata Dunker, Zeitschr. MalakozooL, V, p. 178. 



1857. Avicula lata Reeve, Conch. Icon., X, Avicula, pi. IV, fig. 5 (mss. sp. of Gray). 



1857. Avicula serrulata Adams, H. & A., Gen. Rec. Shells, II, p. 525. 



1860. Avicula lata Reeve, Elem. Conch., II, p. 64, pi. XXVIII, fig. 165. 



1872. Avicula serrulata Dunker in Martini Chemn. Conch.-Cab. (N. F.), VII (3), Avicula, p. 18, 



pi. V, figs. r, 2. 

 1884. Avicula lata Smith, Rept. Voy. "Alert", p. 112. 

 1890. Avicula serrulata Paetel, Cat. Conch. Samm., III, p. 204. 



