REGAN—MARINE FISHES. 243 
extremity of maxillary 3 the length of head; least distance between eye and maxillary 
x to the diameter of eye; preopercular spine longer than in the other species, extending 
much more than } the distance from its base to the vertical from the base of pectoral ; 
10 or 11 gill-rakers on the lower part of the anterior arch. Dorsal V, I 19; second 
spine a little more than § the length of head; distance between origins of dorsals 2 the 
distance from tip of snout to origin of first dorsal. Anal I 17; origin nearly equidistant 
from tip of snout and base of caudal. Pectoral a little more than 2 the length of head, 
ventrals $ to § the length of head, extending to the vent. Silvery; back darker; 
fins pale. 
Seychelles, 37 fathoms. 
Two specimens, 70 and 80 mm. in totul length. 
144. Champsodon microphthalmus, sp.n. (Plate 31. fig. 3.) 
Depth of body 5 in the length, length of head 3}. Snout 13 as long as eye, the 
diameter of which is 6 in the length of head and equal to the interorbital width. Pre- 
maxillaries with a double notch anteriorly; maxillary extending beyond the vertical 
from posterior edge of eye; distance from tip of snout to extremity of maxillary 2 the 
length of head ; least distance between eye and maxillary equal to the diameter of eye ; 
preeopercular spine of moderate length; 9 or 10 gill-rakers on the lower part of the 
anterior arch. Dorsal IV-V, 119; second spine 3 the length of head ; distance between 
origins of dorsals 2 or a little less than ? the distance from tip of snout to origin 
of spinous dorsal. Anal I 17; origin nearer to tip of snout than to base of caudal. 
Pectoral a little more than ? the length of head; ventrals + the length of head, 
extending to the origin of anal. ‘Traces of dark spots on the upper part of the body; 
upper part of spinous dorsal sometimes blackish. 
Maldives: Suvadiva, 30 fathoms, and Mulaku, 27 fathoms. 
Three specimens, 55 to 60 mm. in total length. 
The fishes of the genus Champsodon have usually been referred to a single species, 
viz. C. vorax, Giinth., but a second species has recently been described by Gilbert from 
the Sandwich Islands. In addition to the two species described above and the original 
C. vorax, the type of which is redescribed below, four species of Champsodon are 
represented:in the British Museum collection and are now described as new to science. 
The fishes of this genus may be distinguished by means of the following key :— 
I. Preemaxillaries without anterior notch; maxillary extending to the vertical 
from posterior edge of eye or alittle beyond . . . . . . « « « guentheri, sp. n. 
II. Preemaxillaries with a double notch anteriorly; maxillary extending beyond the vertical from 
posterior edge of eye. 
A. Distance between origins of dorsals much more than } of the distance from tip of snout to 
origin of spinous dorsal. 
1. Preopercular spine strong, extending considerably more than } the 
distance from its base to the vertical from the base of pectoral . .  sechellensis, sp. n. 
34* 
