DISCUSSION OF SPECIES AND THEIE DISTRIBUTION. 339 



stations lxxxviii, lxxxvii, and \< in, at depths of 888, 1,113, and 1,495 meters, 28 speci- 

 mens having been taken from the last named locality. 



The Blake secured specimens from station cccxxyi, in 33° 42' 15" N. lat., 7i; 00' 50" 

 W. Ion., at a depth of fill fathoms: from station OCOXXV, in 33° 35' 20" N". lat., 76 W.lon., 

 at a depth of 647 fathoms; from station ci.xvi. off Guadeloupe, at a. depth of 734 fathoms; 

 ami from station \ci, offDominica, al a depth of 982 fathoms. Ami the Albatross fromsta 

 Don 2115, in 35° 49' 30" N. lat,. 7 1 ' 34' 45" W. Ion., al a depth of 843 lat horns; from station 

 IMS.",, in 28° 51' X. lat.. 88 c 18' W. Ion., at a depth of 730 fathoms; from station 2553, in 3'.; 

 IS' N. lat.. 7(P 3d' W. Ion., at, a depth of 551 fathoms; from station 2140, in 17° 36' Hi" N. 

 lai., 76 Hi iir." W. Ion., at a depth of 966 fathoms; from station 2392,in 28° 47' 3H" N. [at., 

 si 27' W. Ion., at a depthof 724 fathoms; from station 2393, in 28 13' N. lat.. 87 ' 1 I' 30" 

 \V. lun., at a depth of 525 fathoms; Oat. No. 33417. (J. S. 2ST. M., from station 2072, in II 53' 

 N. lat., 62° 35' W. Ion., at a depth of 858 fathoms; Oat. No. 35586, I . S. X. M., from station 



2216, in 39° 47' X. lat., 70° 30' 30" W. Ion., at a depth of 963 fat! is; Cat. No. 34906, U. S. 



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



Oat, No. 35657, V. S. N. M., from station 2234, in 39° W N. lat., 72 (13' 15" W. Ion., at a 

 depth of Sill fathoms; Cat. No. 35553, U. S. N. M., from station 221(1, in 39^ 47' X. lat.. 70 

 30' 30" W. km., at a depth of 963 fathoms; and Cat, No. 35555, U. S. X. M., from station 

 2204, iu 39° 30' 30" X. lat., 71° 44' 30" YV. Ion., at a depth of 728 fathoms. 



MIXONUS, GUnther. 

 Alixonuft, GONTHER, Challenger Report, xxn, 1887, 108. 



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

 same base as the upper part of the fin. They are but slightly stronger than the other rays 

 and prolonged. IJody elongate, compressed, covered with small, very thin and deciduous 

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

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

 with the muciferous system moderately developed, 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. Snout broad, rounded, scarcely 

 overlapping the lower jaw. Mouth very wide; villiform teeth in the jaws, on the vomer 

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

 branchiae none. 



" 1 have long hesitated." writes Gilnther, " to describe this fish under a distinct generic 

 name. The specimen is small, unique, and not in the best state of preservation, 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 Pteroidonus or Dicrolene seems to be doubt- 

 ful on accouut of the difference iu the shape of the head." 



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



Bathyneetes latieeps, GttNTHER, Ann. and Mag. Nat. Hist., 1878, II, 5th ser., 20. 

 Mixonus latieeps, GCnthek, Challenger Report, xxn, issx, 108, pi. \xv, fig. 8. 

 Sirembo Gwntheri, Vaii.lant, Exp. Sci. Travailleur et Talisman, 1889, L'(i8, pi. xxiv, fig. 5. 



Head slightly, body and tail more strongly compressed, low; the latter produced info 

 a moderately long filament. I've rather small, its diameter being one seventh of the 

 length of the head, two thirds of that of the snout, and two lift lis of the into orbital 

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

 infraorbital ring shows in its course 5 or (i wide sinuses, and opens in front by a wide a per 

 ture. Mouth very wide, extending far behind the eye, with the 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 baud narrow. 



