PHILIPPINE MACROUROID FISHES—-GILBERT AND HUBBS. 
Coelorhynchus argentatus SMirH and RADCLIFFE, Proc. U. S. Nat. Mus., 
48, Sept. 27, 1912, 
21. COELORHYNCHUS ARGENTATUS Smith and Radcliffe. 
p. 187, pl. 31, fig. 1 
433 
vol. 
Coelorhynchus acus WEBER, Fische der Siboga-Expedition, May, 1913, p. 160. 
List of stations. 
| | | 
Depth | Bottom | Number 
pee moss) Locality. in tempera- | of speci- 
station. | |fathoms.| ture. mens. 
| | 
Chinaioea Onesoubhenn lZOMls 5 sss aoe epee ea eeee See AD ies te 1 
yo) il ees Lorestan tm cee teat sate isa relate we eran nse) ne ona witto, = 173 EG) 1 
Boles ROnmorthernMindanaos tease seeese ee) tose: eee ee ee ee 175 54.3 3 
DOL a |adancic ce a ee nine Etec ee ns Se meee Saceae eee 169 54.3 | ib 
GARE) |S SAECO ORB Bo Sane 6 aeeae NCO REe BEE Oe REC HBEC SSS See ier: aeaane nee 200 54 1 
5255 | Gulf of Daya Mindanao aves suse ste snoe ce ooce eee panes 00") SeeSeeeeee 1 
Bini vil Otriaiig OL TOLONe Seca Me scans Ag he ae en eS 161 57.4 5 
5172 | do é Skins Sees sce 12 
| 4 tS ceereees 33 
200 54 1 
| 244 52.5 1 
! 
1The type specimen is one of the two from station 5172. 
Inasmuch as both the description and figure given by Weber 
agree exactly with this species, it is evident that Weber’s reference ' 
of his C. acus to C. commutabilis Smith and Radcliffe, a wholly dif- 
ferent species, can not be confirmed. 
For the purpose of close comparison with the next two species, a 
detailed description has been prepared of C’. argentatus. It is based 
upon the type-specimen, 143 mm. long to the anus, but is supple- 
mented by measurements and counts of 13 other specimens ranging 
from 61 to 120 mm. long to anus. 
Fin-rays—first dorsal, II, 9 (8 to 10); pectorals, 15-14 (14 to 
20); ventrals, 7. 
The dorsal contour is scarcely elevated at the origin of the first 
dorsal; before that point the outline is evenly convex; the ventral 
contour is gently curved. The body varies from robust to slender, 
the greatest depth being contained 1.68 (1.7 to 2.4) times in the 
head; the greatest width of the body, across the pectoral bases, 2.55 
(2.4 to 3.0) times. 
The tip of the snout is comparatively rather blunt. The dorsal 
margin’ of the snout is nearly straight; the lateral margins are 
slightly concave immediately behind the tip, but thence nearly 
straight to the more or less prominent anterolateral angles. The 
tip of the snout is on a horizontal passing slightly below (sometimes 
through) the lower orbital margin. Preocular length of snout in 
head, 2.8 (2.4 to 2.7); preoral length, 3.8 (2.9 to 3.6); width of 
snout opposite front of orbits, 3.66 (8.3 to 3.7); width at antero- 
lateral angles, 1.0 (to 1.3) in the distance anterior to that point. 
The occipital ridges converge from both ends toward their middle, 
1Fische der Siboga—Wxpedition, May, 1913, p. 671. 
