2149. JAPANESE MACROUROID FISHES— GILBERT AND HUBBS. 169 



Table of measurements in hundredtlis of length to anus. 



Albatross station 



Total length, mm 



Length to anus, mm 



Length, head 



Length, orbit 



Vv'idth, interorbital 



Orbit to preopercle 



Length, snout 



Length, maxillary 



Length, barbel 



Depth, body 



Width, body, over pectorals . . . 



Height, second dorsal spine 



Height, third dorsal ray 



Length, first dorsal base 



Interdorsal space 



Height, second dorsal 



Height, anal 



Length, first pectoral ray 



Length, second pectoral ray. . . 



Length, thu-d pectoral ray 



Length, outer ventral ray 



Scales below lateral line 



Soft rays, first dorsal 



Ventral rays 



Pectoral rays 



Serrations, second dorsal spine 



50S0 



1365 



111 



4973 

 375 



115 

 67 

 18 

 13 



2S.5 

 20 

 22 

 4.5 

 46 

 30 

 63.5 

 43 

 17 

 53 



49S0 



1350 

 113 

 63.5 

 16.7 

 15 



16.5 

 59 



4.5 

 24.7 



4973 

 3S0 

 121 

 63.5 

 17.3 

 12.5 

 27 

 18.5 

 19 

 3.5 

 50 

 32 

 52 



4972 



265 



104 

 64..'^ 

 19.5 

 14 



4 

 25 

 27.5 

 31 



10 



9-10 

 21 

 2S 



4069 

 203 

 57 

 68 

 21 

 14 



21 

 20 



4 

 46 

 27 



72 



4969 

 197 

 54 

 68 

 21 

 16 



26.5 

 21 

 20 

 3.7 

 48 

 26 

 64 



Genus COELORHYNCHUS Gioriia. 



CoelorJiynclius Gioena, Memoire della R. Accademia della Scienze di Torino 



(Turin), vol. IG, 1803, p. 178 (coelorhynchus) . 

 Paramacrurus Bleeker, Verslagen en Mededeelingen der k. Akademie van 



Wetenschappen, Amsterdam (2), vol. 8, 1874, p. 370 {australis). 

 Oxymacrurus Bleeker, Verslagen en Mededeelingen der k. Akademie van 



Wetenschappen, Amsterdam (2), vol. 8, 1874, p. 370 {japonicus). 



Coelorhynchus is a natural group of species, being constantly char- 

 acterized by the presence of six branchiostegal rays; by the project- 

 ing snout; the wholly inferior, U-shaped mouth; the smooth, 

 rounded second dorsal spine ;^ and the presence of definite ridges 

 on the head, covered with modified scales. The suborbital ridge 

 is the most prominent; it is continuous from the tip of the 

 snout to the preopercle, and forms a prominent angle on the side 

 of the head. M ataeocephalus^ formerly regarded as differing from 

 Coelorhynchus only in the presence of serrations on the dorsal 

 spine, has seven branchiostegals, and is closely related to Lionurus, 

 The sturgeon-like snout evidently has been independently derived 

 in the two genera, as it has surely been in Trachyrhynchus, a genus 

 of the Bathygadinae. 



In some species of Coelorhynchus the anus is remote from the anal 

 fin; in some one or tw'o scaleless fossae are developed on the mid- 

 ventral line anterior to the anus. 



This genus contains a large series of species, one extreme of which 

 is typified by C. coelorhynchus^ with a comparatively short snout, 



1 A pseudocandal developed. 



2 A few rudimentary .serrations are present on the dorsal spine of a paratype of C. pro- 

 ducttis. The same condition was noted on the type of C. gladius Gilbert and Cramer 

 (Proc. U. S. Nat. Mus., vol. 19, 1896, p. 422). 



