PHILIPPINE MACROUROID FISHES — GILBERT AND HTJBBS. 433 

 21. COELORHYNCHUS ARGENTATUS Smith and Radcliffe. 



Coelorhynchus argentatus Smith and Radcliffe, Proc. U. S. Nat. Mus., vol. 



43, "Sept. 27, 1912, p. 137, pi. 31, fig. 1. 

 Coelorhynchus acus Weber, Fische der Siboga-'Expedition, May, 1913, p. 160. 



List of stations. 



Albatross 

 station. 



Locality. 



Number 

 of speci- 

 mens. 



5279 i China Sea, off southern Luzon. 



5291 

 5516 

 5517 

 5518 

 5255 

 5135 

 ' 5172 

 5545 

 5550 

 5566 



.do. 



Off northern Mindanao 



do 



do 



Gulf of Davao, Mindanao 



Vicinity of Jolo 



do 



....do 



do 



Between Jolo and Tawi Tawi. 



1 

 1 

 3 

 1 

 1 

 1 

 5 

 12 

 3 

 1 

 1 



1 The 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 1 

 of his G. acus to G. 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 G. 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 nun. 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 (3.3 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, 



1 Fische der St&ofira-Expedition, May, 1913, p. 671. 



