2582 Bulletin 4.7, United States National Museum. 



e. Head short, 6J in head ; pectoral more than head ; snout with bony 

 ridges above. BAIRDU, 2959. 



ee. Head 5 in length; ventrals 5 in body; pectoral 1 in head. 



LEPTURUS, 2960. 



eee. Head longer, 4| in length; pectoral \ as long as head; eye as long 

 as snout, 4 in head ; ventral 8 in body. ACROLEPIS, 2961. 



dd. Body rather robust, the depth 5 in length; head -without ridges above; 

 scales spinous, not ridged ; dorsal spine If in head. 



STELGIDOLEPIS, 2962. 



cc. Pectoral fin elongate, about as long as head; head elevated, not ridged above, 

 the bones soft ; eye large ; second dorsal spine rough, nearly as long as 

 head; scales each with 7 to 9 ridges. CINEREUS, 2963. 



2957. MACROURUS BERGLAX, Lacepede. 



D. 12-124; A. 148; P. 18 or 19; V. 8. Short snout, subtrihedral, pointed 

 in front, much shorter than the large eye, which is ^ or ^ length of head 

 in the adult. Intermaxillary very short, A .length of maxillary, and not 

 continued beyond its expanded vertical process. Eye oblong. Whole 

 under surface of head below suborbital and nasal ridge naked; axil of 

 pectoral naked ; space between ventrals scaled ; body scales each with a 

 single strong median keel, made up of 5 to 8 spines directed backward ; 

 some scales, particularly of head, have also 2 lateral keels ; 6 longitudinal 

 series of scales between first dorsal fin and lateral line; first dorsal 

 spine indistinctly denticulated toward the point; length of pectoral 

 nearly or quite length of head; longest spine of dorsal very finely ser- 

 rated along its anterior margin, the serrations becoming obsolete near its 

 base. Vent situated behind origin of second dorsal fin. Gill rakers very 

 small, tubercular. 9 to 11 on the first arch; gill membranes broadly joined, 

 free from the isthmus behind. This form, originally discovered on the 

 coast of Norway, has been found abundantly as far south as Georges Bank, 

 where the halibut fishermen catch it, or some closely allied form, on their 

 trawls. The first specimen seen by American naturalists was picked up 

 floating at the surface off the mouth of New York Harbor. The Albatross 

 obtained it from Station 2528, in Lat. 41 47' N., Long. 65 37' 30" W., at a 

 depth of 677 fathoms. Giinther knew it from Finmark and Greenland, as 

 well as from New England. He calls attention to remarkable individual 

 variations in the specimens examined by him. (berglax, Norwegian name, 

 from berg, cliff; lax, salmon.) 



Macrourus berglax, LACEPEDE, Hist. Nat. Poiss., in, 170, 1800, Greenland, Sondmdre ; JOR- 

 DAN, Cat. Fish. N. A., 131, 1885. 



Macrourus fabricii, SUNDEVALL, Vet. Akad. Handl. 1840,6; COLLETT, Norges Fiske, 128, 

 1875; LILLJEBORG, Sverig. og. Norges Fiske, 242; GOODE & BEAN, Cat. Fish. Essex Co. 

 and Mass. Bay, 7, 1879 ; GUNTHER, Challenger Report, xxn, 130, 1887. 



Macrourus rupeatris, GUNTHER, Cat. Fish. Brit. Mas., iv, 390, 1862 (not of Gunner). 



Macrurus berglax, GOODE & BEAN, Oceanic Ichthyology, 391, fig. 334, 1896. 



2958. MACROURUS HOLOTRACHTS, Giinther. 



Head 4f in length ; depth 6|. D. 12-115 to 125 ; A. 121 ; P. 20 or 21 ; V. 

 5; eye large, round, as long as snout, 2 in hoad, much wider than inter- 

 orbital space. Snout triangular, each point with a tubercle, covered with 



