268 Mr. G. A. Boulenger on the 
Hemerocetes, and Callionymus agree in having the three 
occipital cavities for articulation with the first vertebra on a 
straight transverse line. All three lack the air-bladder. 
Number of vertebrae :— 
Trichonotus setigerus ........ 23+ 30= 53. 
Hemerocetes acanthorhynchus. 14+384=48. 
Calliony musi a selene rere 7+14=21. 
calaropaumus.......... 7+14=21. 
A study of the pectoral arch in the “ 'Trachinoid” and 
“ Callionymoid”’ Fishes shows them to be more closely related 
to the Gadoids than was hitherto suspected, and it seems to 
me natural to associate them, together with the Blennioids 
and Batrachoids, with which they are intimately connected, in 
a division of the Acanthopterygu, for which the old name 
Jugulares may be revived. In a later communication I hope 
to deal with the other members of this great division. 
The following forms, which have been associated with the 
“‘Trachinoids”’ by some authors, should be removed from the 
Jugulares. 
1. The Chiasmodontide of Gill, which include two deep- 
sea genera: Chiasmodon, Johns. (Ponerodon, Alcock), and 
Pseudoscopelus, Liitk. The first was placed with the Gadide 
by Giinther, the second with the Berycide by Liitken ; 
both near the Trachinide by the American authors, among 
them by Alcock. I have ascertained on Chiasmodon niger 
that the pelvic fins have no connexion with the pectoral 
arch, fall therefore under the category of abdominal ventrals, 
that the scapular fenestra is entirely in the scapula, and that 
the pterygials are small and hourglass-shaped, four in number, 
three in contact with the scapula. 
Chiasmodon is not entirely naked, as has been stated * ; it 
has a series of scales following the course of the lateral line. 
There are not five, but six ventral rays. An air-bladder is 
present. According to Alcock the vertebra: number 14+ 24. 
Champsodon, Gthr., referred by Giinther and by Alcock 
*% Chiasmodon subniger, Garman, from the Tropical Pacific (919 fath,), 
is described as having the skin thickly beset with fine spinuloid scales, 
presenting a pilose appearance. It should probably be made the type of a 
distinct genus. 
