PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 341 
Citharichthys arctifrons, new species. 
Extreme length of specimen described 137 millimeters.* 
The height of the body (87) is about three-eighths of its total length 
(without caudal), and is equal to about four times the height of the tail 
(9) and about five times its thickness (7). 
The seales are irregularly polygonal, cycloid; the largest about 6 mil- 
limeters in diameter; the diameter (5) nearly equal to that of the eye. 
The scales are flexible, loosely arranged, and very easily detached, so 
that it is difficult to secure a specimen in good order. Small seales on 
the rays of the ventral fins. There are forty scales in the lateral line 
(on the colored side), which is sharply defined and straight, and seven or 
eight above and the same number below the lateral line at the broadest 
part of the body. 
_ The length of the head (24-244) is about one-fourth that of the 
body, and four times the diameter of the eye (6). The interorbital 
space (1) is very narrow, equal to the difference in the distances from 
snout to lower eye (4) and snout to upper eye (5). The length of 
mandible (10-104) is about double the latter distance; the length of the 
maxillary (7-74) slightly more than the greatest width of the body. 
The dorsal fin begins upon the snout, above the anterior margin of the 
upper eye. Its greatest height (13-15) is about three times the distance 
of its anterior ray from the snout. It is composed of 82 to 83 simple rays. 
The anal begins under the axil of the pectoral, its greatest height (14-15) 
equal to or slightly exceeding half the distance of its anterior ray from 
the snout. It is composed of 67 simple rays. ‘ 
The caudal is subsessile, triangular, of 16 rays; its length about equal 
to that of the head. In dorsal, anal, and caudal the rays appear to pro- 
ject beyond the connecting membrane half or two-thirds of their own 
length. 
The pectorals are inserted far below the lateral line and close to the 
gill-opening. The pectoral on the colored side is composed of more 
rays (9-10) than that of the blind side (7), its length (17-19) being about 
double that of its mate (7-9). The ventrals are composed of 4 rays. 
Color dirty light brown. 
Radial formula: D. 82-3; A. 67; C.16; P.9-10-7; V.5; L. lat. 40. 
Numerous specimens, ranging in length from 90 to 140 millimeters, 
were taken, September 4, in hauls 870-871. The females were full of 
ripe spawn. It is not probable, therefore, that the average size of the 
species is much greater than that of the specimens described. 
* No. 25908, Nat. Mus. 
