316 
FISHES. 
poral spiracles; branchial openings encompassing nearly the 
whole circle of the neck; teeth small, conical, and dentated; 
first dorsal tin situated nearly between the pectorals and ventrals. 
Selache maximus. — The Basking Shark. 
Plate LXXIV. fig. 7. 
Back dark lead-coloured gray; abdomen white. Thirty feet 
long. Inhabits the European seas. 
Genus 9—CES TRACI ON. — Cuvier . 
Generic Character .—Jaws sharp, the length of the snout, fur¬ 
nished with small sharp teeth, and with rhomboidal teeth near 
the angles ; each tin with a spine placed before it. 
Genus 10. — SPIN AX. — Cuvier. 
Generic Character. — Snout lengthened, and obtuse at the 
point; teeth placed in numerous rows, small, and cutting; a 
strong spine in front of each dorsal tin ; destitute of an anal fin. 
Genus 11. — CENTRINA.— Cuvier. 
Generic Character. —Teeth of the under jaw edged, set in one 
or two rows; teeth of the upper jaw acute, and set in numerous 
rows; skin very rough ; second dorsal fin situated above the 
ventrals; without an anal tin; tail short. 
Genus 12.—SCYMNUS. — Cuvier. 
Generic Character. — Snout short, blunt; teeth in the upper 
jaw set in one or two row's, and edged; those of the under jaw 
in numerous rows, and pointed; without spines before the dor¬ 
sal tins. 
Genus 13.—SQUATINA.— Dumeril. 
Generic Character. — Head round, depressed; mouth termi¬ 
nal ; having temporal spiracles ; pectoral tins large, reaching for¬ 
wards to the head, and separated from the neck by a cleft, in 
which the branchial openings are situated; the dorsal tins placed 
greatly behind the ventrals; without an anal tin. 
Squatina Icevis .— The Angel Shark. 
Plate LXXV. fig. 1. 
Upper parts gray and tuberculated, white beneath; head cir- 
