320 
FISHES. 
body provided with five rows of large bony tubercles, one on the 
back and two on each side ; abdomen flattened, and dull white. 
Eighteen feet long. Inhabits the European seas. 
Genus 2. —SPATULARIA.— Shaw. 
Generic Character .—Snout greatly prolonged, spatuliform ; 
with a branchial opening on each side of the neck, and provided 
with large operculi; mouth beneath, furnished with sharp ser¬ 
rated teeth. 
Spatularia reticulata .— The Reticulated Spatularia. 
Plate LXXV. fig. 8. 
Head and snout nearly as long as the body and tail, and 
covered with reticulated striae; body sub-cylindrical, tapering to 
the tail; lateral lines conspicuous; dorsal fin near the tail, which 
is luniform. 
SUB-CLASS II.-OSSEOUS FISHES. 
ORDER IV.—PLECTOGNATHI. 
Bones fibrous; upper jaw formed by the intermaxillary bone, 
which is immoveably attached upon the side of the maxillary 
bone; palatine arch adhering to the cranium; branchial cleft 
simple. 
TRIBE I.-GYMNODONTES. 
* 
Genus 1.—DIADON.— Linnaeus. 
Generic Character. —Jaws without central divisions, formed 
of an upper and under entire piece, having a rounded portion, 
transversely furrowed behind the cutting edges; nostrils pro¬ 
vided with double fleshy tentaculi; skin entirely covered with 
thick pointed spines; body capable of inflation like a globe. 
Diadon orbicularis. — The Orbicijlor Diadon. 
Plate LXXVI. fig. 1. 
Nearly spherical; rufous-brown above, and paler beneath; 
