DISCUSSION OF SPECIES \M> THEIE DISTRIBUTION. 423 



millimeters) is contained 2j times in length of the snont. Barbel slenderj long, its length 

 (15 millimeters) equal to 1A times orbital diameter. 



Teeth in narrow villi form ha mis in both jaws. Nunc mi vomer or palatine bones. ( lill 

 rakers very Long and slender, numerous, .'55 on first arch (7 above angle), the largest (7 mil- 

 limeters) contained nearly i> times in the length ofthe head. 



Pseudobrancbise absent. 



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

 iays. Its distance from snout (12 millimeters) 5J in total. The second or longest simple 

 ray (77 millimeters) is nearly 8 times the length <>!' the snout, and reaches to or beyond the 

 thirtieth ray ofthe, second dorsal. The second dorsal contains about 1 10 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 the same distance apart. 



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

 much produced, extending more than halfway from its insertion to the tip of the tail. 

 Bays 13. 



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

 ray ofthe dorsal, its first ray much enlarged, extending more than halfway from its inser- 

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

 Bays 8. Branchiostegals 7. 



Color, yellowish-gray, abdomen bluish. 



This form is closely allied to ]>. mnltifiJis, described by Giinther from off the Philippines 

 (Challenger Report, xxn, 1887, 155, pi. xlii, tig. 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. cottoides, the typical species, than to B. macrops. 



The type specimens (Cat. No. 37338,U. S. 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. hit., 

 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 fathoms. 



Alcock identifies with it a specimen, 8 incheslong, taken in the Arabian Seas at In rest i 

 gator station 65, in 740 fathoms and in the Laccadive Sea, in 683 fathoms. 



BATHYGADUS DISPAR, (Vaillant), Goode and Bean. 



Hymenocephalui dispar, Vaillant, Exp. Scient. Travailleur ot Talisman, 221, pi. xxiv, fi£. 1. 



This form, obtained by the French explorers off the coastof Morocco ata depth of 1,105 

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

 its interorbital space 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 Bathygadus ia separated from theheterogeneous assem- 

 blage formed by him in his supposed genus Hymenocephdlus are entirely superficial. The 

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

 bronchus. 



BATHYGADUS MACROPS, Goode and Bean. 



Bathygadus man-ops, Goode and Bean, Proc. U.S. Nat. Mua., vm, l«8r,, 598.— GOnther, 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. 



