258 162 



exactly agree with specimens of Card, arenicola, Reeve, from Ticao (Philippines) in 

 his collection. Lischke's five specimens from Nagasaki have also only 46 — 47 ribs. 



Cardium (Papyridea) rugatum, Gron. 



CartUum niyatum, Gronovius, Zoophylacium Groiiovianuni, 1781, fasc. Ill, p. 266, No. 1125, pi. 18, fig. 5. 



— - — Martini u. Chemnitz, Conchyl. Cabin., X Bd., 2 Abth., p. 77, pi. 3, figs. 1—3. 



— — — Reeve, Conchol. icon., II, Cardium, Sp. 63. 



— apertum, Chemnitz, Conchyl. Cabin., 1782, VI, p. 189, pi. 18, figs. 181-83. 



North of Koh Kam, 5 fathoms, gravel (2). 



Long. 35—40 mm. 



Distribution:— Singapore, Mergui Archip. (v. Martens), Gulf of Manaar 

 (Thurston). — Philippines (Cuming, and others), Hong Kong (Frauenfeld), Gulf 

 of Yedo (Lischke), Java and Flores (Dunker), Amboina (Tapparone Canefri), New 

 Britain (v. Martens). 



Ed. v. Martens ' thinks that Solen bullaius L. is undoubtedly synonymous with 

 the present species. 



Cardium (Papyridea) papyraceum, Chemn. 



Cardium papyraceum, Chemnitz, Conchyl. Cabin., VI, 1782, p. 190, pi. 18, fig. 184. 



— — — Reeve, Conchol. icon., II, Cardium, Sp. 9. 



— — — Martini u. Chemnitz, Conchyl. Cabin., X Bd., 2 Abth., p. 78, pi. 3, fig. 4 ; 



pi. 12, figs. 19-20. 

 Papyridea papyracea, — Hidalgo, Obias malacologicas, 1, tom. II, 1903, p. 344, No. 444. 



Cardium muticum, Reeve, Conchol. icon., II, Cardium, Sp. 32. 



Koh Kahdat, 1 fathom, sand ('/2). 



Long. 28 mm. 



Distribution: — Singapore (Sv. Gad), Ceylon, Gulf of Manaar, Karachi, Mekran 

 Coast, Persian Gulf, Gulf of Tadjourah (Gravier), Suez Canal (Bavay), Mauritius, 

 Natal. — Philippines, Japan (northwards to Hakodate), Blitong (post-tertiary), north 

 and east coasts of Australia. 



Cardium (Papyridea) Annae, Pilsbry. 



Cardium annœ, Pilsbry, Proc. Acad. Nat. Sc. Philadelphia, vol. 56, 1904, p. 557, pi. 40, fig. 20. 



From Cape Liant to Koh Kut, common, 1 — 30 fathoms, sand, mud, gravel, 

 and shells. 



Long. 3 — 11 mm. 



Distribution: — Japan (Pilsrry). 



Among the individuals from the Gulf of Siam there are several in which the 

 valves are almost quite white excepting the umbones which are purple in colour. 



' Ruinphius Gedenkboek, 1902. Mollusken, p. 127 (19). 



