96 THE CHISMOPNEA (CHIMAEROIDS). 
with three prominences, cutting edge adjoining the median prominence concave, 
“Six distinet rods-occur on both sides of the same prominence.” Pectoral broad, 
reaching far beyond the origin of the ventral. Ventrals small, nearly equal to 
first dorsal. No anal fin. Supracaudal moderately developed, without spines 
on its upper margin; subcaudal much larger, longer, and more than twice as 
deep, origin farther forward near a vertical from the end of the second dorsal. 
Caudal filament four and one third times the diameter of the eye. Hind margins 
of pectorals and ventrals convex, outer angles bluntly rounded. Lateral line 
somewhat nearly straight; jugular section meeting the postorbital a short dis- 
tance behind the junction of the latter with the suborbital and the angular. 
Frontal tenaculum of the male with a much curved stem, agreeing with the 
convexity of the forehead. Clasper simple, slender, reaching the hind margin 
of the ventral, with a rounded knob beset with prickles at the distal end. 
Brownish, darker below, fins edged with blackish. 
Type an adult male of more than 31 inches (80 em.) Closely allied to H. 
raleighana if not identical. 
Outside Okinose, Sagami Sea, Japan, in depths of 400 fathoms. 
HARRIOTTA ATLANTICA. 
Rhinochimaera atlantica Hour and Byrne, 1909, Ann. Mag. Nat. Hist., (8), 3, p. 279. 
“ Diagnosis.— Adult male with the snout (measured between verticals 
from its tip to the origin of the vomerine dental piates) as long as the distance 
between the dorsal insertions of the pectoral and ventral fins and somewhat 
longer than the base of the second dorsal fin. Second dorsal fin with base about 
half as long as the distance between the gill-openings and the origin of the ventral 
lobe of the caudal fin. Posterior ventral claspers terminating in subconical 
slightly volute clubs. Vomerine dental plates deeply notched on their cutting 
edges.” 
The specimen described was about 45.8 inches (1165 mm.) in total length, 
nearly 34 inches from the end of the snout to the supracaudal fin. It was taken 
on the Irish Atlantic Slope. The description as given above would place the 
species in Harriotta rather than in Rhinochimaera. Probably the type repre- 
sents a male of Harriotta raleighana, the largest species of Rhinochimaeridae 
known. 
CALLORYNCHIDAE. 
Callorhynchidae Garman, 1901, Proc. N. E. Zoél. Club, 2, p. 77; 1904, Bull. M. C. Z., 41, p. 271. 
Head short, pointed; snout with a flexible proboscis ending in a retrorse 
leaf-shaped distal extremity. Body compressed, tapering backward and becom- 
