DISCUSSION OF SPECIES AND THEIR DISTRIBUTION. 339 



stations Lxxxviil, Lxxxvii, and xciii, at depths of 888, 1,113, and 1,495 meters, 28 speci- 

 mens Laving been taken from the last-named locality. 



The Blale sc-cnied si)cciniens from station cccxxA-i, in 33° 12' 1.5" K lat., 76° 00' 50" 

 W. Ion., at a depth of KM fathoms; from station cccxxv, in 33° 35' 20" N. hit, 70"^ W. lou., 

 at a depth of 647 fathoms; from station CLXVi, off GuadeUiiipe, at a depth of 734 fathoms; 

 and from station xci, off Dominica, at a depth of 982 fathoms. And the Albatross from sta- 

 tion 2115, in 35° 49' 30" N. lat., 74° 34' 45" W. Ion., at a dei)th of 843 fiithoms; from station 

 2485, in 28° 51' N. lat., 88° 18' W. Ion., at a depth of 730 fathoms ; from station 2553, in 39° 

 48' N. lat., 70O 30' W. Ion., at a depth of 551 fathoms; from station 2140, in 17° 30' 10" N. 

 lat., 7GO 40' 05" W. Ion., at a depth of 96C fathoms; from station 2392, in 28° 47' 30" N. lat., 

 870 27' W. Ion., at a depth of 724 fathoms; from .station 2393, in 28° 43' IS", lat., 87° 14' 30" 

 W. Ion., at a depth of 525 fathoms; Oat. No. 33447, U. S. N. M., from station 2072, in 41° 53' 

 N. lat., 62° 35' W. Ion., at a depth of 858 fathoms; Cat. Ko. 3558G, U. S. 1^. M., from station 

 2216, in 39° 47' N. lat., 70° 30' 30" W. Ion., at a depth of 963 fathoms; Cat. Fo. 34906, U. S. 

 N. M., from station 2117, in 15° 24' 40" N. lat., 63° 31' 20" W. Ion., at a depth of 983 fathoms; 

 Cat. IS^o. 35657, U, S. N. M., from station 2234, in 39° 09' N. lat., 72° 03' 15" W. Ion., at a 

 depth of 810 fathoms; Cat. No. 3.5553, U. S. K M., from station 2210, in 39^ 47' N. lat., 70o 

 30' 30" W. h>n., at a depth of 963 fathoms; and Cat. No. 35555, U. S. N. M., from station 

 2204, in 39o 30' 30" N. lat., 71° 44' 30" W. Ion., at a depth of 728 fathoms. 



MIXONUS, Gunther. 

 Mixonus, Gunther, Challenger Report, xxii, 1887, 108. 



The lower pectoral rays are free, not united by membrane with, but inserted on the 

 same base as the upjier part of the fin. They are butslifilitly stronger tlian the other rays 

 and prolonged. Body elongate, compressed, covered witli small, very tliiii and deciduous 

 scales. Head slightly compressed, broad and flat above, deiiressed in front, naked (with 

 the exception of tlie parts between the mandibles, and perhaps the cheeks). Bones thin, 

 with the muciferons system moderately develoj)ed, only one small spine above on the 

 operculum; preoperculum without spine. Eye small. Vertical fins united, but the narrow 

 caudal projecting beyond the short dorsal and anal rays. Ventrals each reduced to a 

 filament, which consists of 2 rays firmly bound together in their whole length; they are 

 inserted behind the humeral symphysis and close together. 8nout broad, rounded, scarcely 

 overlapping the lower jaw. Mouth very wide; villiform teetli hi the jaws, on the vomer 

 and palatme bones. Gill laminae short; gill-rakers long, not very closely set. Pseudo- 

 branchiiB none. 



" I have long hesitated," writes Giinther, " to describe this fish under a distinct generic 

 name. The specimen is small, unique, and not in the best state of i)reservation, so that 

 several of the characters assigned here to the genus may have to be amended when other 

 specimens are obtained. Its pertinence to either Ftcroidomcs or Dicrolcitc seems to be doubt- 

 fiil on account of the difference in the shape of the head." 



MIXONUS LATICEPS, GfNTnER. (Figure 296, A.) 



liaihijneetca latitrpR, GuNTUEn, Ann. and Mag. Nat. Hist., 1878, ii, 5th sor., 20. 

 Mixonus Ialicq)fi, GiJNTHER, Challenger Report, xxii, 1888, 108, pi. XXV, fig. 8. 

 Sirembo (iiiiithcri, V.ullant, Exp. Sci. Travailleur ct Talisman, 1880, 2G8, pi. xxiv, flg. 5. 



Head slightly, body and tail more strongly comxiressed, low ; the latter produced into 

 a moderately long filament. Eye rather small, its diameter being one-seventh of tlie 

 length of the head, two-thirds of tliat of the snout, and two-fifths of the interorbital 

 space, which is convex. The posterior nostrils are wide; the muciferons channel of the 

 infraorbital ring sliows in its course 5 or 6 wide sinuses, and opens in front by a wide aper- 

 ture. Mouth very wide, extending far behind the eye, with tlic extremity of the maxillary 

 much behind the eye, and much dilated. Vomerine band of teeth V-shaped, with the two 

 arms of the figure straight ; palatine band narrow. 



