DISCUSSION OF SPECIES AND THEIR DISTRIBUTION. 423 



millimeters) is coutaiued 2J times in lenfjth of the snout. Barbel slender, long, its length 

 (l") millimeters) equal to H times orbitMl diameter. 



Teeth in iiarrowvilliform bands in l)iith jaws. None on vomer or palatine bones. Gill 

 rakers very long and slender, numerous, 35 on first arch (7 above angle), the largest (7 mil- 

 limeters) contained nearly G times in the length of the head. 



Pseudobranchiie absent. 



P^irst dorsal of 2 stout spines, the first minute, the second elongate, and 8-9 branched 

 rays. Its distance from snout (42 millimeters) 5i in total. The second or longest simple 

 ray (77 millimeters) is nearly S times the length of the snout, and reaches to or beyond the 

 thirtieth ray of the second dorsal. The second dorsal contains about 140 rays; it is almost 

 continuous with the first, its anterior rays longest and not diminishing rapidly in size 

 toward the tail. 



The anal is inserted under the ninth ray of the second dorsal, its rays much shorter than 

 those in the dorsal, and situated about tlie same distance apart. 



The pectorals are inserted under the anterior portion of the first dorsal, the first ray 

 much produced, extending more than half-way fi'om its insertion to the tip of the tail. 

 Rays 13. 



The ventral origin is slightly behind the origin of the pectoral, under t lie third branched 

 ray of the dorsal, its first ray much eidarged, extending more than halfway I'rom its inser- 

 tion to tip of caudal. Its length (100 millimeters) is contained 2J times in the total length. 

 Rays 8. Branchiostegals 7. 



Color, yellowish-gray, abdomen liluish. 



This form is closely allied to B. multifiJis, describedbyGiinther from off the Philippines 

 (Challenger Report, xxii, 1887, 155, pi. xlii, fig. B). which, however, appears to have a 

 smaller eye, less elongate filaments, and ventral inserted in advance of the first dorsal, 

 while the anal appears to be further back, under the twelfth or thirteenth ray of the 

 second dorsal. Both species are provided with long, slender barbels. In other respects 

 they are closer to B. coffoides, the typical species, than to B. macrops. 



The type specimen.'i (Cat. No. 3733S,U. 8. N. M.), 225 and 233 millimeters in length, were 

 taken by the Albatross at station 2392, in 28° 47' 30" N. lat., 87° 27' W. Ion., at a depth of 

 724 fathoms. The Albatross also secured examples from station 2393, in 28° 43' 00" N. lat, 

 870 14' 30" W. Ion., at a depth of 525 fathoms; and from station 2385, in 28° 51' K lat., 88° 

 18' W. Ion., at a depth of 739 fathoms. 



Alcock identifies with it a specimen, 8 incheslong, taken in the Arabian Seas at Investi- 

 gator station 65, in 740 fathoms and in the Laccadive Sea, in G83 fathoms. 



BATHYGADUS DISPAR, (Vaillant), Goode and Bean. 

 Eymenncephnhin (Ihpar, Vaillant, Exp. Sclent. Travailleur et Talisman, 221, pi. xxiv, fig. 1. 



This form, obtained by the French explorers off the coast of IVIorocco at a depth of 1,105 

 fathoms, closely resembles the two preceding, but according to Vaillant its body is thicker, 

 its interorbital si)ace comparatively narrower, the ventral filament shorter, and the barbel 

 stronger and longer. Since only one specimen was studied there is scarcely sufficient evi- 

 dence that this is a well-marked species. 



Vaillant's characters upon which liathi/fiarhis is .separated from theheterogeneous assem- 

 blage formed by him in his supposed geiuis Hymenoccphalus are entirely superficial. The 

 presence of a barbel led him to separate this form from its near ally Bathygadus melano- 

 branehus. 



BATHYGADUS MACROPS, Goode .ami Bean. 



Bathygadus macrops, Goode and Bean, Proc. U.S. Nat. Mus., viii, 1885, 598.— GCnther, Challenger Report, 

 XXII, 1887, 156. 



The body is somewhat compressed; its greatest height (46 millimeters in the specimen 

 examined) is contained 6A times in the total length. 



