194 DEEP SEA FISHES. 
The variations among the numerous species are so gradual from one 
to another that genera are only to be separated with difficulty. While 
the authors of the Oceanic Ichthyology recognize seventeen genera, it 
appears from recent additions and the present material that it would be 
better to reduce the number to three, Bathygadus, Corypheenoides, and 
Trachyrhynchus, placing the balance of the genera so called as subgenera 
(Macruronus a possible exception) under Corypheenoides, which last dating 
from 1765 takes precedence over Macrurus of 1787. This is an approxi- 
mation to the arrangement of Giinther, 1887. Only a dozen species in all 
were recognized by Giinther in 1862; in 1887 his list of the deep sea 
species amounted to forty-six. Goode and Bean, 1896, Oc. Ich., xxv., 
give a list of eighty-five species (three of the species and three of the 
genera being new). In the list herewith there are a hundred and twenty- 
five species, a score of which are new. 
MACRURID &. 
Macrurus bulbiceps sp. n. 
Plate XLIV. figs. 1-10. 
Br. r.6; D. 11 + 107; A. 99; V. 8; P. 22-23. 
In form this species resembles MW. bucephalus to some extent; it is read- 
ily distinguished, however, by the shorter head, a blunter snout, the scales, 
and the dentition, and by the shapes on the top of the snout, and on the 
preopercle. Body much, and head but little compressed, depth one sixth of 
the total length; caudal region tapering regularly to the slender extremity. 
Head nearly one fifth of the total length, hardly as wide as deep, massive, 
rounded, blunt anteriorly, convex on the crown and the snout. Snout 
broad, blunt, convex and descending from the interorbital space, shorter 
than the eye, without prominent tips on either lateral or median angles, 
length from the maxillaries one half of that of the eye. Cheeks convex ; 
suborbital ridges very low. Eye large, orbit longer than the snout, equal 
to the width of the forward part of the interorbital space or to one fourth 
of the length of the head. Mouth large; maxillary reaching backward 
of the middle of the eye. Teeth conical, separated, in a single rather 
irregular series. Preoperele with hinder angle less prominent and lobular, 
and hinder outline less concave than on M. bucephalus. Barbel slender, 
three fifths as long as the eye. Interorbital space convex, widening 
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