1858. Maliens tigrimis and M. decurtatus Reeve, Conch. Icon., XI, Maliens, pi. III. figs. 7, 10. 



1860. Maliens tigrimis Reeve, Elem. Conch., II, p. 65. 



1870. Maliens tigrimis Mac Andrew, Ann. Mag. Nat. Hist., (4) VI, p. 449. 



1886. Maliens deatrtatns Cooke, Ann. Mag. Nat. Hist., (5) XVII, p. 137. 



1890. Maliens deciirtatns and M. tigrimis Paetel, Cat. Conch. Samm., III, p. 207. 



1890. Maliens decurtatus and M. tigrimis Clessin in Martini-Chemn. Conch-Cab. (N. F.), VIII (l), 



Malleacea, p. 10, pi. III, figs. 2 — 4. 

 1S97. Maliens tigrimis Sowerby, Mar. Shells S. Africa, SuppL, p. 27. 

 1909. Maliens régula var. deciirtatns Lynge, D. Kgl. Dansk. Vidensk. Selsk. Skr. Nat. -Math., 



(7) V, p. 145- 

 191 1. Maliens tigrinus Pelseneer, "Siboga" Lamellibranches (Anat.), p. 26, pi. VII, fig. 12. 

 1919. Maliens regnla var. deciirtata Odhner, Arkiv. Zool., XII, N° 6, p. 4. 

 1929. Maliens régula var. deciirtata Dautzenberg, Faun, Colon. Français., III, p. 564. 



I agrée with Odhner and Dautzenberg that Lamarck's Maliens decurtahts is only a 

 variety of M. régula (Forskâl). Cooke was also right in including M. tigrimts Reeve and probably 

 M. solitaria Reeve ^) in the synonymy of this form. 



Distribution : — M. régula var. deairtala has a wide range of distribution in the Indo- 

 Pacific and the Red Sea. For a detailed list of localities référence may be made to Lynge's 

 paper cited above. 



In the "Siboga" collection it is represented by young shells from the Bay of Nangamessi, 

 Sumba (St. 53), Pulu Sanguisiapo, Tawi Tav^i Islands, Sulu Archipelago (St. 93), Nalahia Bay, 

 Nusa Laut Island (St. 234), Anchorage between Nusa Besi and the N.E. point of Timor (St. 282) 

 and St. 310 (8° 30^ S., ii9°7'.5E. ; 73 mètres). 



Family Pectinidae. 

 Subfamily Spondylinae. 

 Genus Spondylus Linn. 



1758. Spondylus Linnaeus, Syst. Nat., (éd. X), p. 690. 



1823. Spondylus Children, Quart. Journ. Sci. Lit. Arts, XV, pp. 41, 42. 



1847. Spondylus Sowerby, Thés. Conch., I, p. 417. 



1847. Spondylus Gray, Proc. Zool. Soc. London, p. 201. 



1856. Spondylus Reeve, Conch. Icon., IX, Spondylus, pi. I, (explanation). 



1858. Spondylus Adams, H. & A., Gen. Rec. MolL, II, p. 559. 



1858. Spondylus Kiister in Martini-Chemn. Conch. -Cab. (N. F.), VII, (2), Pectinacea, p. i. 



1886. Spondyhis Fischer, P., Man. Conchyliol., p. 938. 



■ 1898. Spondylus Dali, Trans. Wagner Free Inst. Philadelphia, III, p. 758. 



1915. Spondylus Fulton, Journ. Conch., XIV, p. 331. 



1925. Spondylus Woodring, Miocène Mollusks from Bowden, Jamaica, Pelecypods etc., p. 75. 



Spondylus gaederopus Linn. was designated as the type of the genus Spondylus by Children. 

 Good descriptions of the genus are published in the works of Sowerby, Adams, Kuster, 

 Fischer and Woodring. 



i) Reeve's type of this species is, as noted by Cooke, no longer available, and there ave no otlier spécimens of it in the 

 CuMiNG collection. 



