34 PAPERS FROM TORTUGAS LABORATORY vol. xxxiv 



(spine) of first dorsal fully as long as 3d and 4th, its length equal to eye and 

 snout; ventral filament, attached to outer ray of fin, reaching a little beyond 

 origin of anal. 



General color gray; first dorsal crossed by a black bar at about mid-length; 

 black saddle on back, under and behind tips of rays of dorsal, the latter missing 

 in the largest specimen (235 mm.); axil of pectoral black; inside of gill covers 

 dusky; peritoneum black. 



The following proportions and enumerations are based on 2 specimens, 175 

 and 235 mm. long: Head in total length 4.1 to 4.6; depth 4.9 to 6.5. Eye in head 

 3.1 to 3.5; snout 3.0 to 3.9, its projection beyond lower jaw 3.5 to 3.8; interorbital 

 4.65; pectoral 1.9; ventral 2.8 to 3.2. D. 10-73 to 7^; A. 85 to 90; P. 17; V. 7. The 

 rays in the second dorsal and in the anal become so short and indefinite pos- 

 teriorly that the counts given should not be considered accurate. 



Gulf Stream, south to the Caribbean Sea. S. F. H. 



Hymenocephalus sp. 



A single damaged specimen, about 200 mm. long, and fragments of two others 

 belonging to the genus Hymenocephalus are in the collection. One of these 

 specimens was taken in 357 to 392 fathoms and the others in 430 fathoms. I am 

 unable to identify this material with any known species. Because of the unsatis- 

 factory condition of the specimens it does not seem advisable to attempt to found 

 a new species on them. The specimens apparently are nearest to H. cavernosus, 

 paratypes of which were compared with the Tortugas material. The caudal part 

 of the body seems to be more robust in the Tortugas specimen; the 2d dorsal 

 spine, though broken, seems to be longer; and the ventral rays are more numer- 

 ous (13, whereas H. cavernosus has n). The skull is equally cavernous; the teeth 

 in both jaws are in bands, the outer ones in the upper jaw being somewhat en- 

 larged; and the position of the fins and the color apparently are identical. 



The following proportions and enumerations, exclusive of that of the ventral, 

 are based on the single specimen in good enough condition to be measured. Even 

 this specimen is in three pieces, with ventrals missing, and the second dorsal and 

 anal so broken and mutilated that an enumeration of the rays is impossible: 

 Head in total length 6.2; depth 6.6. Eye in head 2.7; snout 4.5; interorbital 4.6; 

 pectoral 1.45. Distance from tip of snout to origin of first dorsal in total length 

 4.9; distance from tip of snout to origin of anal 3.35. First D. 12; P. 13 to 15; 

 V. 13. 



Concerning one of these specimens Dr. Longley wrote: "Mouth undershot; 

 first dorsal spine smooth; body iridescent." The large mouth is nearly horizontal; 

 the maxillary reaches about opposite the posterior margin of the pupil; and the 

 free part of the scales is covered with spines. S. F. H. 



Family BREGMACEROTIDAE 



Bregmaceros atlanticus Goode and Bean 



The collection contains 6 specimens, 42 to 58 mm. long, all from south of Bird 

 Key, from muddy bottom: 4 from 20 fathoms, 1 from 30, and 1 from 40 fathoms. 



