from the Bay of Bengal. 
435 
Rhomboidichthys angustifrons , Gthr. 
Rhomboidichthys angustifrons , Gunther, Zool. 1 Challenger’ Exp. vol. i. 
pt. vi. p. 46, pi. xxi. fig. B. 
Off south-east coast of Ceylon, lat. 6° 6' 30" N., long. 
81° 23' E., 32 fathoms ; bottom sand, shells, dead coral, &c. 
Rhomboidichthys azureus , Alcock. 
Rhomboidichthys azureus , Alcock, Journ. As. Soc. Beng. vol. lviii. pt. ii. 
pp. 283, 284. 
Off south-east coast of Ceylon, as above, 32 fathoms. 
Also met with all along the Ganjam coast, in depths 
ranging from 11 to 33 fathoms, and in places where the 
bottom consists either of hard sand, or of broken shells, rock, 
and dead coral. 
Examination of a large number of specimens shows the 
radial formula to be 
D. 84-90. A. 64-70. C. 17. L. lat. 55. 
The lateral line on the blind side has no suprapectoral 
curve, but simply rises gradually to the post-temporal region. 
The males of this species, in addition to the brilliant blue 
spots on the snout, are altogether brighter coloured than the 
females ; on the blind side too they show a large, subcuta- 
neous, pyriform, black patch. 
Rhomboidichthys valde-rostratus , sp. n. 
D. 84. A. 64. L. lat. 48. 
Body pyriform ; its height very nearly half its length, 
including the caudal. Head slightly over f of the same 
standard in length, and half again as high as long ; its ante- 
rior profile almost vertical. 
Snout abruptly prominent, in length barely f the major 
diameter of the eye, bearing on its left side an advanced, 
up-curved, bifid horn of equal length. Eyes on the left side, 
prominent, in diameter about \ of the head-length ; the lower 
nearly half its length in advance of the upper ; internal orbital 
margins strong, thick, salient, and spiny. Interorbital space 
deeply concave, scaly, except for a narrow bridge of naked 
skin in its anterior part ; its width is nearly a diameter and a 
half of the eye. Nostrils small; the anterior tubular, the 
posteiior subtubular on the coloured side. 
Mouth-cleft moderate, approaching the vertical ; the length 
