THE CHISMOPNEA (CHIMAEROIDS). 85 
Aaass., 1844, Poiss. Foss., 3, p. 337, pl. C; Gray, 1851, Chond., p. 21; Costa, 1852, Fn. Nap., 
Pesci, Chim., p. 4, pl. 1-7; Knroéy., 1853, Danm. Fiske, 3, p. 784; Dum., 1865, Elas., p. 686; Cap., 
1868, Jorn. Ac. Lisb., 2, p. 1388; Giwr., 1870, Cat., 8, p. 349; Canest., 1872, Ital., Pesci, p. 62; 
Cott., 1875, Norg. Fiske, p. 206; Pory, 1876, Ann. Soc. Esp., 5, p. 182, pl. 8; 1866, Repert., 1, p. 
242; Husrecut, 1876, Ned. Arch. Zool., 3, p. 255, pl. xvii, f. 2, 3, 5; Maun, 1877, G. och B. Fn. 
Rygg., p. 605; Wintu., 1879, Prodr. Ichth. Dan., p. 56; Grau., 1880, Elenc. Pise., p. 51; Mor., 
1881, Poiss. Fr., 1, 455; Dop., 1881, Man., 2, p. 16; Day, 1884, Brit. Fishes, 2, 286, pl. 151; 
VaILu., 1887, Poiss. Trav. and Tal., p. 80, pl. 4, f. 2; Garm., 1888, Bull. M. C. Z., 17, p. 73, pl. 2; 
1904, Bull. M. C. Z., 41, p. 272, pl. 7, f. 1-2, pl. 11, and pl. 13, f. 1; Hotr and Catp., 1895, Trans 
Roy. Dub. Soc., (2) 5, p. 8368; Goopr and Bran, 1896, Oc. Ich., p. 31; Jorn. and EvEerm., 1896, 
Bull. 47 U. S. Nat. Mus., p. 94. 
Callorynchus atlanticus Gronovius, 1772, Act. Helvet., 7, p. 49; Gray, 1854, Gron. Cat., p. 16. 
Callorynchus americanus GRON., 1772, loc. cit., p. 49. 
Chimaera argentea AScAN., 1772, Icon., pl. 15 
Le Roi des Harengs du Nord Daus., 1787, Encl. Meth., Poiss., 202. 
Chimaera praecisa WaB., 1792, Art. Gen. Pisc., p. 588. 
La Chimére Arctique LAC., 1798, Poiss., 1, 392, pl. 19, f. 1. 
Chimaera borealis SHaw, 1804, Zool., 5, pt. 2, p. 865, pl. 157. 
Northern Chimaera SHAw., 1. c. 
Chimaera mediterranea Risso, 1826, Hist. Nat. Eur. Mér., 3, p. 168. 
Rabbit-Fish Ftem., 1828, Brit. Anim., p. 172. 
Chimaera. cristata Faber, 1829, Fisch Isl., p. 45. 
King of the Herrings Yarr., 1836, Brit. Fish., 2, 364. 
Callorynchus centrina Gray, 1854, Gron., Cat., p. 15. 
Arctic Chimaera Coucu, 1867, Brit. Fish, 1, 145, pl. 34. 
Chimaera monstrosa, the type species of the genus, has the head compressed, 
subeconical; snout soft, rather blunt, without rostral appendages; body com- 
pressed; caudal section tapering from the body-cavity to a long filament at 
the end of the tail. First dorsal fin triangular, close to the head, short, deep, 
preceded by a strong erectile spine and followed by a low dermal fold. Second 
dorsal low, three times as long as the head, extending two thirds of the length 
above the caudal region; not indented on the upper margin, reaching above 
the origin of the caudal. Length of body from end of snout to origin of supra- 
caudal about five times the length of the head. Caudal fins low, rising slowly 
in front, and descending very gradually backward. Anal small, rising slowly, 
separated by a narrow notch from the subcaudal. Ventrals far in the forward 
half of the total length; claspers of the male trifid nearly two thirds of their 
length, the third section being slender and styliform. Pectorals large, one and 
one third times or more as long as the head, reaching behind the origins of the 
ventrals; hinder-margins slightly concave. Lateral line less wavy than in C. 
phantasma. Eye large, lateral. Dorsal spine nearly as long as the head, denticu- 
late on the hinder edges, reaching behind the origin of the second dorsal. Five 
to seven tritors on each of the vomerine dental laminae. Attaining a length 
of three feet and upwards. 
Brown, reddish to silvery or golden on the upper surface; more or less 
clouded and blotched with brown, irregularly scattered or in longitudinal streaks; 
