76 



DEEP SEA FISHES. 



genera in the first and twelve species of seven genera of the second of these 

 subdivisions. In the first, one genus and three species, and in the second, 

 three genera and ten species are undescribed. The two Lophiomi are aUied 

 to Lophius, but differ, as other species of the Pacific, in having but eighteen 

 vertebriE. One of the two is remarkable for the details in the illicium ; 

 both were taken at less than 300 fathoms. Another of the first subdivision 

 is an ally of Melanocetus ; it is peculiar in the obsolescence of its vertical 

 fins. The fourth is a new species of Chaunax, agreeing closely with the 

 species previously known in details, yet, dwelling in the ooze, possessed of a 

 compressed body, with a high nape, differences that may necessitate the 

 establishment of a new subgenus {Chaunacops) to distinguish it from the 

 depressed forms heretofore described. Like all species of Chaunax, though 

 overlooked previous to the description of C. Niittwgii, the present species 

 has a second dorsal spine on the skull, under the skin. 



The representation of the Halieutoids forms a much larger proportion of 

 the total number of known species belonging to the group; inclusive of 

 several species described by others it contains about fifty per cent of this 

 subdivision, and ten of the species are here described for the first time. 

 Three genera are also characterized as new. It is a question whether it 

 would not be quite as well to reduce the number of genera to about five, 

 Haheutella, Oncocephalus, Halieutichthys, Halieutc'ea, and Dibranchus, and to 

 treat the others, Zalieutes, Halieutopsis, Dibranchopsis (for D. spongiosa 

 Gilb.), Dibranchichthys, Malthopsis, and Halicraetus as subgenera. The fol- 

 lowing table sets forth the present arrangement : 



Gills 2^ J 



r /'Body and head subspherical HaHeiUella. 



Palatine and vomerine 

 teeth present 



Palatine and vomerine 

 teeth absent 



Disk depressed, subtriangular ; a proboscis Oncocephalus. 

 l^Disk flattened, subcircular ; no proboscis Halieulicldhys. 



[• Disk flattened, subcircular; snout indented 

 Disk subcircular ; snout indented 



Halieutcea. 



r Palatine and vomerine 



teeth absent ^ pj^j^ subtriangular ; snout pointed 



Gills 2 \ Palatine teeth but no vomerine ; disk subtriangular 



f A dorsal fin 

 Disk subcircular -< 



Palatine and vomerine 

 teeth present 



(_ No dorsal fin 



Halieutopsis. 



Dibranchus. 



Dibranchichthys. 



Malthopsis. 



Halicmelus. 



