254 158 
Cardium setosum, RepritLp, HipaLco, Obras malacolégicas, 1, tom. II, 1903, p. 329, No. 428. 
latum, CHEMNITz, Conchyl. Cabin., VI, 1782, p. 197, pl. 19, figs. 192—93. 
— — Autorum (REEVE, ROMER e.a. non Born fide F. Braver! et Epa. A. SmirH; loc. cit.). 
Islands in the Gulf of Siam (L. Mortet, Journ. de Conchyliologie, vol. 37, 
1889, p. 168). 
The Danish Expedition to Siam collected no specimens of this species. 
Distribution:— Mergui Isls., Nicobars, Madras, Ceylon, Bombay, Persian 
Gulf, Gulf of Aden. — Hong Kong, Philippines, Java, Sulu Isls. 
Cardium (Acanthocardium) Sueziense, Iss. 
Cardium Sueziensis, Issev, Malacol. d. Mar Rosso, 1869, p. 76, pl. 3, fig. 4. 
—— sueziense — Epa. Smirn, Lamellibranchiata of the Challenger Exped., p. 158, pl. VIII, figs. 
2—2 b. 
— fragum, LINNE var. sueziense, IsseL, CH. HEpLEy, Australian Museum, Sydney. Memoir III, 1896—- 
1900, p. 504. 
Between Koh Mesan and Cape Liant, 5—9 fathoms, sand (2). Between Koh 
Riot and Koh Mesan, 3—5 fathoms, sand (12). Koh Kahdat, 1 fathom, sand (2). 
West of Koh Kut, 15 fathoms, mud (15). 
Long. 4—10 mm. 
Distribution: — Ceylon, Gulf of Manaar, Angrias Bank, Laccadive and Maldive 
Archip., Persian Gulf, Mekran Coast, Red Sea (SruraAny), Gulf of Suez (common, 
IsseL and M Anprew). — Torres Strait, Levuka, Viti Isls., 12 fathoms (CHALLENGER), 
Funafuti (Ellice Isls.). 
Epa. A. Smiru (loc. cit. p. 159) is quite right in thinking that the present species 
may become larger than his specimens (7 mm.) from the Viti Islands; in the Gulf 
of Siam they attain, as stated above, 10 mm. IssEL gives as the maximum for the 
specimens from the Gulf of Suez 6 mm., SruRANy” mentions the following measure- 
ments for specimens from Massaua: — alt. 7°25 mm., long. 7°5 mm., crass. 5°75 mm. 
Several of the individuals from the Gulf of Siam were ornamented with distinet 
intercostal sculpture, and both entirely white individuals and also forms with red 
dots and spots occur; in the latter the red colour is also seen upon the white 
interior of the valves. Valves are often found which are vivid yellow upon the 
interior of the umbonal region. Cu. Hepiery (loc. cit.) is of opinion that the 
species under consideration is a variety of Hemicardium fragum L. Upon the basis 
of the material collected at Funafuti Atoll (Ellice Isls.) he says: “The four dozen 
odd valves before me exhibit much variation in contour, and they appear to pass 
by gradual transition into typical C. fragrum,” but I doubt whether he is right in 
this supposition. (I do not understand the reason why HeEpLey always in his paper 
gives “C. fragrum L.” for C. fragum L.). 
1 F. Brauer, Sitzungsber. d. k. k. Akad. d. Wiss. Wien. Mathemat. naturw. Classe, Bd.77, 1 Abth., p. 127. 
° Nachrichtsblatt d. Deutsch. Malakozool. Gesellsch., 1905, p. 139. 
