2574 Bulletin 4.7, United States National Museum. 



distance from its base to front of anal; scales rather small, 10 or 11 in a 

 series between lateral line and origin of second dorsal or middle of first 

 dorsal; scales on sides very thin and flexible, readily deciduous, each 

 furnished with low diverging ridges, usually 3 in number, bearing few 

 minute spinules, and projecting but little beyond the margins of the 

 scales; entire head, including snout and mandibles, invested with much 

 smaller scales irregularly imbricated, those on the opercles marked simi- 

 larly to those on sides, the others usually each with a single median ridge 

 terminating in a spinous point ; no naked spots or pits on head or between 

 ventral fins; a small narrow area behind and below axil of pectorals. 

 Color light grayish, darker on belly and head ; mouth, gill cavity, and 

 peritoneum black; lateral line black; dorsals and veutrals dusky ; anal 

 lighter, edged with blackish; pectorals black. Bering Sea to Oregon. 

 Specimens have been taken at Albatross Stations 3071, 3074, and 3075, in 

 depths of 685 to 877 fathoms, off the coast of Oregon, and from near Bogos- 

 lof Island in Bering Sea in 664 fathoms. It is a large, firm-fleshed species, 

 easily recognized, (pectoralis, pertaining to the pectoral.) 



Macrurus (HalacocepJialus) pectoralis, GILBERT, Proc. U. S. Nat. Mus. 1891, 563, off the 



coast of Oregon. (Coll. Dr. Gilbert.) 

 Macrurus (Nematonurus) magnus,* GILL & TOWNSEND, Proc. Biol. Soc. Wash., xi, 1897 



(Sept. 17, 1897), 234, Bering Sea, southwest of Pribilof Islands. (Types, No. 48770 and 



48~71, U. S. Nat. Mus. Coll. Albatrost. ) 

 Albatrossia pectoralis, JORDAN & GILBERT, Report Fur Seal Invest., 1898. 



1002. BOGOSLOVIUS, Jordan & Evermarin, new genus. 



I 



Bogoslovius, JORDAN & EVERMANN, new genus (clarki). 



This genus is close to Challnura, from which it is distinguished by its 

 dentition, having the teeth in the upper jaw in 2 series, the outer slender 

 and sharp, slightly arrow-shaped; those of the inner small, close set, 

 replacing the villiform band of Chalinura. Scales excessively rough ; ven- 

 tral filament produced ; dorsal spine filamentous, sharply serrate ; dorsal 

 fins close together ; pectorals inserted below upper angle of gill opening. 

 Deep seas. (Named for the volcanic island, St. John Bogoslof, in Bering 

 Sea, near which the typical species was dredged.) 



a. Ventrals much longer than head, reaching far beyond front of anal. CLARKI, 2949. 

 aa. Ventrals shorter than head, scarcely reaching front of anal. FIRMISQUAMIS, 2950. 



* We have examined'the type and cotypes of Macrurus (Nematonurus) magnus, Gill <fc 

 Townsend, and lind them to agree fully with Albatrossia pectoralis (Gilbert). The type 

 may be redescribed as follows : Head 5 ; depth 7J ; eye 44 in head ; snout 4? to 4J ; maxillary 

 2; pectoral 2 in head; ventral with short filament, 2J in head. Mouth large, witli lat- 

 eral cleft. Dorsals well separated, the interspace not base of first dorsal; long dorsal 

 spine smooth, or with 1 or 2 roughnesses near its tip, its length 3f in head ; second dorsal 

 low; pectoral inserted low, below angle of opercle. Scales moderately large, readily 

 deciduous, decidedly oblong or long, with a small exposed surface which is beset with 

 about 5 radiating ridges with conspicuous spinigerous ridges on dorsal surface, but not 

 armed at tip; head regularlv conical; snout rather long, projecting | its length beyond 

 mandible ; tubercles feebly developed, plain, and continuous from 3 parallel ridges ; infra- 

 orbital flat, with the crest rather nearer the orbit than its lower margin; its en tire surface 

 scaly ; teeth in the upper jaw biserial or triserial in front, the outer series strongly hooked, 

 the inner series considerably smaller and well separated from the outer series ; an irregular 

 series between in the type specimen; teeth in lower jaw uniserial or irregularly biserial. 

 Three specimens, the largest (type of M. magnus) 43 inches long. 



