121 217 



The specimens from the Gulf of Siam exhibit, as is always the case in this 

 species, great variation in their coloration ; there are specimens which are'almost 

 entirely white, and individuals in which the rays are slightly indicated, also 

 forms in which the rays are very definite, and dark brown, lilac, etc. in colour. 

 Römek's D. Deshayesii (Dkr.) is scarcely Dunker's species; it is more probably a form 

 of D. ciineatus, and this V. Bertin and Hidalgo also think. Zelebor's Donax 

 (Latona) granosus^ from Amboina does not belong to the present species; as far 

 as I can see it is nearer to 0. englyptus, Dkr. (= D. compressas, Lam.), at any rate 

 it is not Lamarck's granosus. 



Donax (Latona) faba, Ch. 



Donax Faba, Chemnitz, Conchyl. Cabin., VI, 1782, p. 270, pi. 20. figs. 266 — 67. 



— — — SowERBY, Thesaur. Conchyl., Ill, 1866, p. 312, No. 45, pi. 283, figs. 108 9. 



— {Latona) Faba, Chemnitz, Römer in Martini u. Chemnitz, Conchyl. Cabin., X Hd., 3 Abth., 1869, 



p. 88, pi. 2, figs. 12— 13 and 15-17. 



— — — — V. Bertin, Revision d. Donacidees, p. 109, No. 94. 



— faba, Chemnitz, P.Fischer, Catalogue d. Moll, de llndo Chine, p. 241. 



— Faba, — Hidalgo, Fauna malacol. de I. isl. Filipinas, 11, p. 169, No. 293. 



— radiata, Spengler, Schröter, Einleit. in d. Conchylienkenntn., Ill, 1786, p. 104, No. 11, pi. 8, fig. 3. 



— — Schröter, Gmelin, Syst. Nat. ed. Xlll, 1790, p. 3266, No. 17. 



— radians, Lamarck, Hist. nat. d. aniin. s. vert., V, 1818, p. 547, No. 6. — éd. 2, VI, p. 241, No. 6. 



— — — Encydop. method. Moll., pl. 261, fig. 7 (non radians, Reeve et Sowcrby). 



Coast of Lem Ngob (1). South coast of Koh Chang, sand (5). Koh Kahdat, 

 1 fathom, sand (43). Koh Mak, sandy coast (1 + '^/-)- 



Islands in the Gulf of Siam (L. Morlet). 



Long. 14 — 26 mm. 



Distribution:— Salanga, Madras, Gulf of Manaar, Malabar Coast, Gulf of 

 Oman, Assab (Caramagna), Mauritius, "South Africa" (Sowerby). — Cochin'China, 

 Tonkin (banks of Song-kai (Red River)), Hong Kong, Liukiu Isis. (Höttger), Philip- 

 pines, Moluccas, Java, New Guinea, Sorong, Port Jackson, New Caledonia, Viti Isis. 



Sowerby- considers D. Deshayesii, Dunker (from Lower Guinea), to be a variety 

 of D. faba, Chemn. — D. splendens, Dkr., ^ is very closely related to the present 

 species. 



Fam. Cardiliidae. 



Cardilia inermis, Desh. 



Cardilia inermis, Deshavf„s, Magazin de Zoologie. 1844, p. 6, pl. 100. 



— — — P. Fischer, Journ. de Conchyl., 1861, vol. IX, p. 342. 



— — — Reeve, Conchol. icon., vol. XIX, Cardilia, Sp. 2. 



' Dunker u. Zelebor, Verhandl. d. k. k. zool. botan. Ges. Wien, 1866. p. 916. — G. v. Fhaienpeld, 

 Mollusken d. Novara E.\pedition, p. 15, pl. 2, fig. 27. 



- Thesaurus Conchyliorum, 111, Donax, pi. IV, figs. 108-9 (and the explanation of plates). 

 ' Novitates Conchologicac. Meeres Conchyl., p. 79, No. 87, pl. 25, fig. 5. 



I). K. I). Vlilensk. .Selsk. Skr.. 7. Ha-kkc, n.ilurvidcnsk. of! ni;illi AW V. 3. 28 



