258 162 
exactly agree with specimens of Card. arenicola, Reeve, from Ticao (Philippines) in 
his collection. LiscHKke’s five specimens from Nagasaki have also only 46—47 ribs. 
Cardium (Papyridea) rugatum, Gron. 
Cardium rugatum, Gronovius, Zoophylacium Gronovianum, 1781, fasc. III, p. 266, No. 1125, pl. 18, fig. 5. 
MarTINI u. CHEMNITZ, Conchyl. Cabin., X Bd., 2 Abth., p. 77, pl. 3, figs. 1—3. 
- -- — Reeve, Conchol. icon., Il, Cardium, Sp. 63. 
- apertum, CHEMNITz, Conchyl. Cabin., 1782, VI. p. 189, pl. 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 (FRAvENFELD), Gulf 
of Yedo (LiscHke), Java and Flores (DuUNKER), Amboina (TAPPARONE CANEFRI), New 
Britain (v. MARTENS). . 
Ep. v. Martens! thinks that Solen bullatus L. is undoubtedly synonymous with 
the present species. 
Cardium (Papyridea) papyraceum, Chemn. 
Cardium papyraceum, CHEMNITZ, Conchyl. Cabin., VI, 1782, p. 190, pl. 18, fig. 184. 
= - Reeve, Conchol. icon., I], Cardium, Sp. 9. 
- _— Martini u. CHEMNITZ, Conchyl. Cabin., X Bd., 2 Abth., p. 78, pl. 3, fig. 4; 
pl. 12, figs. 19 — 20. 
Papyridea papyracea, — HipaLGo, Obras malacolodgicas, 1, tom. I, 1903, p. 344, No. 444. 
Cardium muticum, REEVE, Conchol. icon., Il, Cardium, Sp. 32. 
Koh Kahdat, 1 fathom, sand (1/2). 
Long. 28 mm. 
Distribution: — Singapore (Sv. Gap), Ceylon, Gulf of Manaar, Karachi, Mekran 
Coast, Persian Gulf, Gulf of Tadjourah (GraAvier), Suez Canal (Bavay), Mauritius, 
Natal. — Philippines, Japan (northwards to Hakodate), Blitong (post-tertiary), north 
and east coasts of Australia. 
Cardium (Papyridea) Annae, Pilsbry. 
Cardium anne, Pitssry, Proc. Acad. Nat. Se. Philadelphia, vol. 56, 1904, p. 557, pl. 40, fig. 20. 
From Cape Liant to Koh Kut, common, 1—30 fathoms, sand, mud, gravel, 
and shells. 
Long. 3—11 mm. 
Distribution: — Japan (Pivssry). 
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. 
' Rumphius Gedenkboek, 1902, Mollusken, p. 127 (19). 
