147 243 
This beautiful species is doubtless often confused with Ch. marica L., which 
it somewhat resembles, and it is probably more widely distributed than is at 
present known. The specimens from the Gulf of Siam vary greatly both in outline 
and in colour, most of them are not as high as is shown in Smrru’s figure (but 
the measurements given in the text agree fairly well with those of my specimens), 
and resemble more closely Rreve’s figure (loc. cit.), which I think ought to be 
referred to the present species. The coloration varies exceedingly, there are scarcely 
two specimens which are alike in regard to painting; pale-red, white, and yellow 
individuals occur, with brown or red zigzag-lines, spots and rays, and many other 
paintings. In the interior of the valves the colour varies from entirely white to 
dark lilac. As the lamella upon the posterior end are often only slightly conspicuous, 
I think that ApaAms’s and REEVe’s species Venus costellifera is nothing but an individual 
of Ch. recognita, Sm., with worn or only slightly developed lamelle; the other 
distinguishing characters given for V. costellifera are also not very good. H. A. 
Pitspry,! under the name of Ch. hizenensis, has described a very closely allied form 
from Japan. 
Chione (Omphaloclathrum) subnodulosa, Hanl. 
(PIS Vembige. 0) 
Venus subnodulosa, Haney, Proc. Zool. Soc. London, XII, 1844, p. 160. 
— — - Catalogue of rec. biv. shells, p. 360, pl. 16, fig. 19. 
Chione - Desuayes, Catalogue of the Conchifera in Brit. Mus., I, 1853, p. 143. 
Venus -- — REEVE, Conchol. icon., XIV, Venus, Sp. 102. 
Off Koh Kam, 10 fathoms, gravel (7/2). Between Koh Mesan and Cape Liant, 
5—9 fathoms (8). Gulf of Rayong, 7—10 fathoms, sand, mud (13). S. of Koh Samit, 
20 fathoms, mud (21). Off Tung Kaben, 6 fathoms, mud mixed with sand (2). S. of 
Koh Mak, 5—6 fathoms ('/2). N. of Koh Kahdat, 4—5 fathoms, coarse sand (8). 
Koh Kahdat, 1—5 fathoms, sand (5). Between Koh Kut and Koh Kahdat, 6—10 
fathoms, shells, and clay mixed with sand (25). W. of Koh Kut, 15 fathoms, mud (4). 
W. of Koh Kut, 30 fathoms, sand, mud ('/:). 
Long. 3—19 mm. 
Long. 19 mm., alt. 18 mm., crass. 10 mm. 
Distribution: — Singapore (2—3 fathoms, coral-reef (?/2), Danish Exp. to 
Siam), Philippines (HANLEy), Thursday Island (v. Martens), Torres Strait (MELVILL 
& STANDEN), Mast Head Reef, Queensland (HEDLEY). 
This species varies rather considerably, e. g. with regard to the distances 
between the concentric lamelle. The coloration is also, as in Ch. recognita, Sm., 
very variable; usually the primary colour is light or yellowish, with brown rays or 
stripes; in the Gulf of Siam, however, entirely white specimens, with dark brown 
lunules, were taken. The interior of the valves is either quite white or ornamented 
with dark spots and rays. 
' Proceed. Acad. Nat. Hist. Philadelphia, vol. 56, 1904, p. 553, pl. 41, figs. 1—2. 
: 31° 
