68 DEEP SEA FISHES. 



subvertical ridges and points on the lower section. Ojjerculum with a 

 longitudinal ridge which ends in a weak point. Gill covers very thin, 

 striate. A moderate spine between the nostrils on the top of the snout. 

 Gill lamella} very short ; gill rakers nine plus twenty-two, elongate, one 

 and two thirds times the length of the eye, compressed, rather broad at 

 the ends. Pseudobranchite small. 



Dorsal origin about midway from the snout to the base of the caudal. 

 Anal origin nearly below the eleventh ray of the dorsal, the seventh or the 

 eighth anal ray being below the base of the hindmost dorsal ray. Pectorals 

 long, slender, reaching the hindmost ray of the anal. 



Scales large, cycloid, concentrically striate, thin, deciduous, more numer- 

 ous and smaller than those of Mclamphacs nigrofulvns. 



Surface deep black, in life apparently tinted to some extent with 

 yellowish brown ; linings of body cavity black. 



SCOMBROIDS. 



Except in one case none of the Scombroids in the list given below have 

 been assigned to levels lower than 400 fathoms ; the one exception is 

 that of Neulotus tripes Johns., noted by Gunther in the " Challenger " report 

 from a depth of 2675 fathoms, but with the question whether the specimen 

 may not have entered the dredge much nearer the surface of the ocean. 

 In the present collection two genera are represented, each genus by a 

 single species of which only one has a given depth, Tricldums nitcns 

 sp. n., from 210 to 322 fathoms. This species is a close ally of T. Upturns 

 of the Atlantic. The other species, that with which no depth is given, 

 is, so nearly as may be determined at this moment, the species described 

 by Lesson under the name Lcmnisoma thyrsitoidcs, the Gempylus cohiber of 

 Cuvier and Valenciennes. 



TRICHIURID^. 



Gempylus serpens Cuv. 



It is not possible to determine from the descriptions whether the 

 specimens from the Pacific represent a different species or variety from 



