2592 Bulletin //, Lhiitcd States National Rhiseum. 



including maxillary, 3 in head ; mandible 2 in depth of body ; barbel 2 to 

 1\ in eye. Gill rakers very small, tubular, almost rudimentary, about 10 

 below angle of first arch ; attachment of membrane to iirst arch very 

 extensive, but free from isthmus; no pseudobranchia'. First dorsal com- 

 paratively low, the first spine rudimentary, the second elongate and 

 smooth ; insertion of first dorsal immediately over or somewhat behind 

 base of pectoral, its distance from snout 1^ in head, its base equal to 

 snout, its longest spine, when laid down, reaching behind origin of second 

 dorsal, or \.\ to 2 in head; second dorsal very low, its distance from first 

 3 to 1 in head, 32 rays in a distance equal to length of head; 22 in same dis- 

 tance of anal; anal much higher than second dorsal, yet very low, its 

 longest ray equal to eye; distance of anal origin from snout 4J in total 

 l^gth, or nearly under origin of second dorsal; pectoral inserted under 

 or somewhat in front of origin of first dorsal, its length about 2 in head; 

 ventral inserted behind vertical from end of base of first dorsal, extend- 

 ing to origin of anal, its length about equaling eye ; vent about midw.ay 

 between origin of ventrals and anal. Color brown; al)domen and lower 

 parts of head blackish in the young. West Indies and Gulf of Mexico, in 

 deep water; taken both by the Albatross and the 7.7a7ic. (sulratus. fnr- 

 rowed.) 



Coryphcfnoides gulraixK, Goode it BEAN, Proc. U. S. Nat. Mus. 1885, 59G, Gulf of Mexico, 

 at Albatross Station 2394, Lat. 28° 38' 30" N., Long. 87° 02' 'W., in 420 fathoms 

 (Type, No. 3733.".); G<>ode & Bean, Oceanic Ichtliyology, 403, 1896. 



Macrurus (Malaeocephaliis) .sulcatus, Gunthee, Challenger Eeport, Deep-Sea Fialies, xxu, 

 160, 1887. 



Trachonnms sulcatng, Goode & Bean, Oceanic Ichtliyolon;y, 410, fig. 343, 1896. 



1009. LIONURUS, Giinther. 



JCionurus, Gi^iNTHER, Cliallenger Report, xxn, Deep-Sea FisbcB, 124, 1887 {filicarida). 



This genus is close to Macrourus, differing in the smooth, flaccid scales, 

 and soft, cavernous skull, characters associated with its extreme bathybial 

 degradation. {XeIoz, smooth; ovpd, tail.) 



o. Barbel minute, not ^ pupil; eye small, 5 in head; tail very slender. 



FILICAUDA, 2969. 

 aa. Barbel moderate, If in eye ; eye 3| in head. liolepis, 2970. 



2960. LIONURUS FILICAUDA (Giinther). 



D. 11; P. 20; V. 9; ca'ca 7. Snout considerably projecting beyond the 

 mouth, pointed in the middle, twice as long as eye, which is nnusnally 

 small, only \ as wide as interorbital space. Mouth rather wide, extend- 

 ing beyond the center of the eye. Upper teeth villiform, in a very nar- 

 row band, those of mandible very small, biserial. Barbel minute. Pre- 

 operculum with the angle produced backward, broadly rounded and 

 crenulated on the margin. Terminal portion of the tail prolonged into a 

 long filament, more slender than in any of the other species. Bones of 

 head soft. Scales of moderate size, thin, cycloid, and deciduous, 6 or 7 in 

 a transverse series between the first dorsal spine and the lateral line ; snout 



