76 Zoological Society :— 
inches. 
Eye, distance from tip of snout ,.....sseesseeug 4f 
EGVies, OIStANGE ABATE. «ci. 2% wie om +e ois he ofeaien meee 35 
Dorsal, length of base.......... neh ce oh ee) = ey 
- ALE LS AG operaie opereie,\8ie.o, ote: opshhahege sheer ee 17 
=, distance 1FOMmm@SnOUt, . <4 a5 45 us ctae cies ey 52 
Pectorals, leneth: 0). ost m on weet ee teeta ie 
» WIOGM Of DASE. sevtetreveree ic ta a 
=, Gistance {rom SHOUtts. v- soehe = oe ed 25 
Wentralsslenctlt (0 j-se.t a iolekie seahtlie otsiwler cues 1 
SWUIStANCE ATOM), SNOUL Ss ticseik. oa eehoe 4,8, 
Vent wistamce:coml SuOUn cos .s. ae, ener soon Ue 
Anal, height of fourth and the neighbouring rays.. + 
Carel al wo Vays on ois iateleiaioye Wake iste tos oes ie oer eee 
This species is dedicated to Professor Richard Owen, Superin- 
tendent of the Natural History Departments of the British Museum, 
whose investigations in regard to the skeleton of fishes are not the 
least valuable part of his many contributions to zoological science. 
CHIASMODON, gen. nov. 
Body naked, elongate, with two perfect dorsal fins, one anal fin, 
simple thoracic ventral fins, and distinct caudal fin. Head unarmed 
and exappendiculate. Snout short, truncate. Cleft of the mouth 
very long, extending much beyond the eyes. Acute teeth in two 
series in the premaxillary and the mandible, those of the inner series 
being moveable. Hooked teeth, and teeth that cross each other 
from opposite sides of the mouth in the upper jaw. Teeth on the 
palatines, but not on the vomer. Eyes lateral. Gill-openings large; 
four pairs of gills. Seven branchiostegal rays. No pseudobranchiz; 
no anal papilla. An air-bladder. 
CHIASMODON NIGER, sp. n. 
ist:D al) 2nd D, 13. (AS 17.49 P1 2.1 V2.6, -C/14 5 avi 
Body black, naked, moderately elongate, compressed, and slender. 
Head unarmed, thick, subcubical, depressed, with a wide groove 
between the eyes, and two low ridges which meet in front of them. 
Cheeks flat ; opercle rounded behind, with a notch at the junction 
of the subopercle and interopercle. Eyes lateral, nearly round, 
placed about a diameter from the muzzle (in front of the middle of 
the upper jaw) and about the same distance apart, with the orbit 
taking part in the profile. The hinder nostril, which is the larger, 
is placed very near the orbit. Muzzle short, truncate, subemarginate; 
the under jaw somewhat longer. Mouth-cleft slightly oblique, long, 
extending much beyond the eyes; the upper border formed entirely 
of the slender premaxillary, the toothless maxillary being a little di- 
lated at the ends. Two series of subulate teeth in each jaw, those of 
the inner series being longer, but fewer in number. At the fore end 
of the upper jaw are two long immoyeable hooked teeth, which are 
inclined towards each other and nearly meet. At the base of each 
is a minute sharp tooth. Next to the hooked pair is a pair of cur- 
