Order PROTOBRANCHIA. 



Family Nuculidae. 

 Genus Nucula Lamarck. 



1799. Niicula Lamarck, Mem. Soc. Hist. Nat. Paris, p. 87. 



1857. Nucula Adams, H. & A., Gen. Rec. MolL, II, p. 544. 



1860. Nucula Hanley in Sowerby, Thés. Conch., III, p. 147. 



1886. Niicula Fischer, P., Man. Conchyliol., p. 982. 



1898. Nucula Dali, Trans. Wagner Free Inst. Philadelphia, III, p. 571. 



1925. Nucula Woodring, Miocène Mollusks from Bowden, Jamaica, Pelecypods etc., p. 13. 



I cannot agrée with Dall that Nuctilana Link is a synonym of Nucula Lamarck. On the 

 other hand, as Iredale ^) remarked Leda Schumacher is a substitute name for Nucula Lamarck, 

 even though the type-species cited by Schumacher is not a Nucula^ as this genus is now restricted. 



Good descriptions of the genus are given by Hanley, Fischer and Woodring. The 

 génotype, by monotypy, is Nucula micleus (Linn.) and Children's désignation ^) oî Nucttla rosir ata 

 which is the type of Nticulana Link does not effect the status of the gênera. 



In the "Siboga" collection in addition to s.everal already known and new species described 

 in this report for the first time, there is a représentative of the subgenus Acila H. & A. Adams *). 

 Stoliczka *) designated N. {A.) divaricala Hinds as the type of this subgenus. 



I. Nucula [Nticula^ super ba Hedley. 



). Nucula obliqua Hanley (nec Lamarck), in Sowerby Thés. Conch., III, p. 156, pi. CCXXX, 

 fig. 150. 



1870. Nucula obliqua Sowerby, Conch. Icon., XVIII, Nucula, pi. II, fig. 14. 



1885. Nucula obliqua Smith, "Challenger" Lamellibranchia, p. 225. 



1896. Nucula Tennisoni Pritchard, Proc. Roy. Soc. Victoria, VIII, p. 128. 



1899. Nucula obliqua Melvill & Standen, Journ. Linn. Soc. London (Zool.), XXVII, p. i88. 



1901. Nucula obliqua Tate & May, Proc. Linn. Soc. N. S. Wales, XXVI, p. 435. 



1902. Nucula superba Hedley, Mem. Austral. Mus., IV, p. 292. 

 1910. Nucula superba Hedley, Austral. Ass. Adv. Sci. XII, p. 343. 



191 2. Nucula superba Hedley, Rec. Austral. Mus., VIII, p. 131, pi. XI, fig. 12. 



As Hedley rightly remarked, the species recorded by Hanley and SiMITh under the 



i) Ireuale, t. — Trans. New Zealand Inst, V, p. 483 (191 5). 



2) Children, J. g. — Quart. Journ. Sci. Lit. Arts, XIV, p. 320 (1823). 



3) Adams, H. & A. — Gen. Rec. Moll., II, p. 545 (1858). 



4) Stoliczka, F. — Cretaceous Faun. S. India, Pelecypods, p. 325 (1870). 



