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 allied 
to Lophius, but differ, as other species of the Pacific, in having but eighteen 
vertebrae. 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. Nutlingii, 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, 
Halieutella, Oncocephalus, Halieutichthys, Halieutaea, and Dibranchus, and to 
treat the others, Zalieutes, Halieutopsis, Dibranchopsis (for D. spongiosa 
Gilb.), Dibranchichthys, Malthopsis, and Halicmetus as subgenera. The fol- 
lowing table sets forth the present arrangement : 
Body and head subspherical Halieutella. 
Palatine and vomerine 
teett t Disk depressed, subtriangular ; a proboscis Oneocephalus. 
eeth presen 
Vs 91 : : se 
Gieet Disk flattened, subcircular ; no proboscis Halieutichthys. 
Palatine and vomerine - F : - : 
Disk flattened, subcircular; snout indented Halieutea. 
teeth absent 
Disk subcircular ; snout indented Halieutopsis. 
Palatine and vomerine 
teeth absent Disk subtriangular ; snout pointed Dibranchus. 
Gills 22 Palatine teeth but no vomerine; disk subtriangular Dibranchichthys. 
A dorsal fin Malthopsis. 
Palatine and vomerine \ Disk nine 
teeth present No dorsal fin Halicmetus. 
