DISCUSSION OF SPECIES AND TIIEIK DISTRIBUTION. 423 



millimeters) is coutaiued 2^ times in 1(mij;11i of the snout. JJarbel slfiider, lon<>', its length 

 (l.> millimeters) equal to 1^ times oil)ital diameter. 



Teeth in narrow villiform bands in both jaws. None on vomer or palatine bones. Gill 

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

 limeters) contained nearly G times in the lengtli of tlie head. 



Pseudobranehia* absent. 



First dorsal of 2 stout spines, the first nuuute, the; second elongate, and 8-9 bra,nched 

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

 ray (77 millimeters) is nearly 8 times the length of the snout, and reaches to or beyond the 

 thirtietli ray of tlie second dorsal. Tlie second dorsal contains about 140 rays; it is almost 

 contiruious with the first, its anterior ray.s 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 the 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 from its insertion to the tip of the tail. 

 Kays 13. 



The ventral origin is slightly behind the origin of the pectoral, under the third branclied 

 ray of the dorsal, its first ray nuich enlarged, extending more than halfway from its inser- 

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

 Kays 8. Branchiostegals 7. 



Color, yellowish-gray, abdomen Ijluish. 



This form is closely allied to Ti. midiifiUs, describedby Giintherfromoff the Philippines 

 (Challenger Eeport, xxii, 1887, 1.55, pi. xi.ii, 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, uiuler 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. cottoides, the typical species, than to B. mncrops. 



The type specimens (Cat. No. 37338, U. S. N. M.), 225 and 233 aiillimeters 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., 

 87° 14' 30" W. Ion., at a depth of 525 fathoms; and from station 2385, in 28° 51' N. lat., 88° 

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



Alcock identifies uith it a specimen, 8 incheslong, taken in the Arabian Seas at Iiircsti- 

 gator station 05, in 740 fathoms and in the Laceadive Sea, in (!83 fathoms. 



BATHYGADUS DISPAR, (Vaii.lant), Goode ami Bean. 



Hymenofpphnhtu rlixpar, Vaiixant, Exji. Soient. Trav.ailleur et Talismau, 221, pi. xxiv, tig. 1. 



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

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

 its interorbital space comi>aratively narrower, the ventral filament .shorter, and the barbel 

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

 dence that this is a well-marked species. 



Vaillant's characters upon which Buth!/fiufJiisif=. separated from theheterogeneous assem- 

 blage formed by him in his supposed genus HijnunocephaJus are entirely superticial. The 

 presence ofabarbelled him to separate this form from its near ally Bathygadus melano- 

 branchus. 



BATHYGADU.S MACROPS, Goode ami Bean. 



Bath!,ga,h,. macrops, Goode and Bean, Proc. V. S. Nat. Mas., vm, 1885, .W8.-GfNTHKR, Cballon-er Report, 

 XXII, 1SS7, 1.51). 



The body is somewhat compressed: its greatest height (40 millimeters in the specimen 

 examined) is contained 6.^ times in thf total length. 



