MACRIIHUS HUCEPIIALUS. 195 



rapidly backward. Supranarial ridges strongly bent toward one another 

 between the nostrils. 



Origin of the spinous dorsal above the axil of the pectoral ; first spine very 

 small ; second spine largest, slender, with spinules few and scattered, and 

 with a filament, total length three fifths of that of the head ; base as long as 

 the orbit. Second dorsal low, feeble anteriorly, origin distant from the base 

 of the first dorsal one length of the orbit. Anal well developed, one and 

 one third lengths of the orbit farther backward than the base of the first 

 dorsal, backward of the head three fourths of the length of the latter, dis- 

 tant from the ventrals two thirds of the length of the head. Vent close to 

 the anal fin. Ventrals small, below the base of the pectorals, first ray fila- 

 mentary at the end, half as long as the head or longer. Scales moderately 

 harsh ; the spinules with which they are thickly beset are low and not 

 bristling as in the case of M. hucephahis. No pyloric appendices. 



Rusty brownish ; blackish on the fins and belly and on the linings of the 

 body cavity. 



Station. Latitude. Longitude. Depth. Temperature. Bottom. 



3363 5° 43' K 85° 50' W. 978 fethoms 37.5° F. Wh. glob. Oz. 



Macrurus bucephalus sp. n. 

 Plate XLIV.figs. 2-21. 



Br. r. 6 ; D. 10 + 87-93 ; A. 94-97 ; V. 9 ; P. 23. 



Body cavity short; caudal region compressed, thin, elongate, tapering 

 rapidly near the abdomen and gradually backward to a slender threadlike 

 extremity. Head rather short and broad, near one fifth of the total length, 

 subround in transsection, little higher than wide. Snout short, blunt, with 

 three low angles, median angle not greatly in advance of the lateral, length 

 equal to that of the eye or to the width of the interorbital space, steep in 

 front of the mouth, distance of the tip from the maxillaries two thirds of the 

 length of the orbit. Eye of medium size, one fourth as long as the head, 

 orbital length equal to that of the snout or to the interorbital width. 

 Mouth large, subtending about two thirds of the eye. Teeth small, in villi- 

 form bands, outer series of the upper jaw separated and larger. Suborbital 

 ridge low, rounded, hardly apparent backward of the orbit. Barbel small, 

 half as long as the eye, one sixth longer on large specimens. 



The supranarial ridges are nearly parallel and straight from the orbit to 

 the lateral angle on the snout. On the ^ireopercle the lower angle extends 



