NO. 2149. JAPANESE MACROVROID FISHES— GILBERT AND HUBBS. 197 



Table of measurements in hundredths of length to anus. 



A Ibatross station 



Total length, mm 



Length to anus, mm 



Length, head 



Length, orbit 



Width, interorbital 



Width, suborbital 



Orbit to preopercle 



Length , snout 



Length, maxillary 



Length, barbel 



Depth, body 



Anus to anal 



Anus to ventral 



Ventral to isthmus 



Height, second dorsal spine. 



Height, third dorsal ray 



Length, first dorsal base 



Interdorsal space 



Length, pectoral 



Length, outer ventral ray... 

 Length, second ventral ray. 



Scales, above lateral line 



Serrations, dorsal spine 



Gill-rakers, lower limb 



1 A pseudocaudal developed. 

 25. LIONURUS DARUS, new species. 

 Plate 10, fig. 1. 



This species is represented only by the type-specimen, 132 mm. 

 long; dredged at a depth of 197 fathoms, at Albatross station 5060, 

 in Siiruga Gulf, Hondo ; Cat. No. 76867, U.S.N.M. 



Dorsal II, 10 ; ventral, 9 ; pectoral, about 19. 



Body robust; the gi'eatest depth, below the origin of the first 

 dorsal, 1.15 in head; width of body over pectorals less than half the 

 depth. Origin of first dorsal high, on the crest of a sharp elevation of 

 the dorsal contour ; the base of the first dorsal very oblique. Ventral 

 contour evenly and rather strongly curved. Tail very slender. 



Head firm; the sensory canals comparatively little developed. 

 Snout 3.7 in head, its anterior edge nearly vertical; tip of snout 

 apparently with a scaleless gi'oove just within each lateral margin, 

 and armed with a strongly spined terminal tubercle. Lateral mar- 

 gins and lateral tubercles not prominent. Preopercular margin 

 bluntly rounded, not projecting backward at angle, the ridge evenly 

 rounded ; a triangular portion of the interopercle visible behind pre- 

 opercle ; suborbital ridge rather sharp, rising forward at an angle of 

 about 50 degrees; the median rostral ridge, and the two lateral 

 ridges, which curve inward above the nostrils, are prominent (pos- 

 sibly due to shrinkage in alcohol) ; occipital crests convergent back- 

 ward, meeting the supraoccipital crest, which extends backward to 

 within a distance equal to length of snout from the origin of the 

 dorsal. Orbit round, 3.1 in head. Interorbital, at its narrowest 

 point above the anterior edge of pupil, 1.4 in orbit, widening rather 

 abruptly posteriorly. Suborbital about half as wide as orbit. Mouth 



