No. 1. — Chlamydoselachus anguineus GARM.— A living Species 
of Cladodont Shark. 
By S. GARMAN. 
Description. 
MEASUREMENTS. — Total length 59.5 inches. Snout to angle of mouth 4.5, to 
back of skull 4.25, to occipital pores 3.9, to end of gill-covers 7, to base of pecto- 
rals 8.5, to end of pectoral 14.25, to vent 35.5, to base of ventrals 32, to end of 
ventrals 38.6, to base of anal 39.75, to end of anal 47.6, to base of dorsal 42.25, to 
end of dorsal 47.75, to base of caudal 48.5 ; distance from bases of pectorals to bases 
of ventrals 23; greatest width (across ventrals) 7, width across caudal 5, width 
across dorsal and anal 6.5, width of head across eyes 3.5, width of the largest tooth 
between the ends of the outer prongs 0.25, length of the longest cusp 0.17; and 
greatest circumference 11.5 inches. 
Rows of teeth, 13.9. 42. 
Rays on first branchial arch (hyomandibular and ceratohyal) 22, on second 15, 
third 14, fourth 12, fifth 9, sixth 6, and seventh none. 
Has. — Japan. 
THE length of the specimen described is not far from fifteen times its 
diameter, or a little more than five times its greatest circumference. 
An elongate body, a long subtriangular and flattened head, an ante- 
rior mouth, a most extensive gape, jaws bristling with sharp subconi- 
cal hooked teeth, and a sinister look about the eyes, give it a remote 
resemblance to certain ophidia; and the narrow isthmus between the 
gills crossed by the free mantle or flap of the first gill-cover is strongly 
suggestive of certain fishes. The resemblances to snakes and fishes are 
only remote; the shagreen, the fins, the teeth, the gill-openings, the 
cartilaginous skeleton, etc., show the animal at once to be a Selachian, 
one of the Sharks. 
The single small dorsal, and the large ventrals, anal, and caudal, have 
the appearance of being bunched together; they are placed so far back 
as to leave a space of almost two feet of the length entirely unrelieved 
by fins, which contributes considerably toward an eel-like appearance. 
The skull is short, and, jaws and suspensorium (hyomandibular) being 
very long and loosely articulated, the hinder portion of the head spreads 
easily till its width equals its length, and the outline from above resem- 
bles an equilateral triangle, or, better, an arrow-head with barbs. 
VOL. x11 — No. 1. 1 
