THE CHISMOPNEA (CHIMAEROIDS). 89 
long as the head; greatest depth equal length of orbit, depth in the mid length 
half as much; border rising posteriorly to nearly the anterior height. Pectorals 
large, reaching the bases of the ventrals, hind margins slightly coneave. No 
distinct anal. Dorsal fins united by a low fold; interdorsal space shorter than 
the base of the first dorsal. Dorsal spine about two thirds as long as the head. 
Hye two sevenths the length of the head. Supracaudal fin slightly the deeper; 
subeaudal the longer; a caudal filament. Lateral line irregular, but not in short 
waves; jugular branch meeting the postorbital near the junction of the latter 
with the suborbital and the angular. Claspers of male short, stout, trifid 
more than half their length; the three branches being somewhat. similarly 
expanded toward the distal end. 
Blackish, with spots of white on the flanks. 
Japan: Aomori, near Tsugaru Strait; Off Otsu, Province Hitachi. 
CHIMAERA MIRABILIS. 
Chimaera (Bathyalopex) mirabilis Cotterr, 1904, Forh. Vid. Selskr., Chra., No. 9; 1905, Report on the 
Norwegian Fishery and Marine-Investigations, 2, p. 35, pl. 1, f. 4. 
Head nearly two ninths of the length from snout to supracaudal, little more 
than one third as long as the second dorsal base. Outer angles of pectorals 
rather blunt, hind margins convex. Ventrals convex posteriorly. Interdorsal 
space short. Pectorals long, reaching behind the origins of the ventrals. Sub- 
caudal longer, deeper, and extending farther forward than the supracaudal. 
Caudal filament long. No anal fin. Lateral line bending abruptly upward 
close behind the junction with ocular and orbital; jugular section meeting the 
angular, at a distance below the junction of the latter with the orbital and the 
suborbital sections. Forehead prominent in front of the eye. Orbit large, 
half as long as the head, in an individual 432 mm. long. Dorsal spine as long 
as the base of the fin, two thirds as long as the head, reaching the origin of the 
second dorsal. Height of anterior and posterior portions of second dorsal about 
half the length of the orbit, the coneave middle portion descending to about 
one third the height of the anterior. Dorsal notch hardly separating the two 
dorsals. 
Greyish brown, fins darker. 
Faroe Channel; Faroe Bank, at 750-1200 metres. 
