408 REPORT OF NEW JERSEY STATE MUSEUM. 
a slit behind fourth. Pseudobranchiz small. Air-vessel present. 
Pyloric cceca present. Body usually covered with very small 
scales which are not imbricated but placed in oblique series at 
right angles with each other. Vertical fins low, without spines, 
confluent around tail. Tail isocercal. WVentrals at throat, each 
developed as a long forked barbel. 
Carnivorous fishes of most warm seas, some descending to con- 
siderable depths. 
Genus Risso.a Jordan and Evermann. 
The Sand Cusks. 
Rissola marginata (De Kay). 
Acand Tel: 
Head 5%; depth 87%; D. 154; A. 125; caudal 8; snout 4% in 
head; eye 4%4; maxillary 2%; interorbital space 614; pectoral 

Sand Eel. Rissola marginata (De Kay). 
114; ventral 114. Body elongate, strongly compressed, and tail 
not especially tapering from vent. Head obtuse, compressed. 
Snout obtuse, bluntly conic, and protruding beyond mandible. 
Eye anterior, a little longer than deep. Mouth rather large, little 
inclined, and maxillary reaching a trifle beyond posterior margin 
of pupil, but not that of orbit. Lips fleshy, a little thick. Teeth 
small, pointed, in bands in jaws and those anteriorly a little en- 
larged. Broad patches of vomerine and palatine teeth a little 
more obtuse. Tongue small, free and pointed. Interorbital space 
narrow and a trifle convex. Gill-rakers 11 +4, lanceolate, strong, 
and longest about 34 of horizontal diameter of pupil. Scales 
elongate, or lozenge-shaped, numerous and irregularly adherent. 
