848 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 
base of caudal; membrane behind dorsal and anal extending nearly to 
base of caudal. 1). I, I, 4; A. 4; C. 8; P. 19. Greenland. 
(Krdyer. Naturli. Tidsskr. 1844, 039; Giiuther, iii, 205.) 
410.— MANCAS^IAS Gill. 
(Gill, Proc. U. S. Nat. Mus. i, 227, 1878: type Ceratias uranoscopus Murray. 
General characters of Ceratias^ but with the spinous dorsal reduced to 
a rostral spine, and two fleshy claviform tubercles behind it. Pectoral 
fins narrow, with about 1 0 slender rays. (Latin mancus, defective, “ with 
a quasi diminutive termination to correspond with CeratiasP) 
130§. M. laraasoscopEis (Murray) Gill. 
Uniform black. Anterior spine of first dorsal produced in a long 
filament, ending in a pear-shai»ed bulb, terminating in a semi-trans- 
parent whitish spot, this spine originating on posterior part of head, 
and reaching, when depressed, nearly to the tip of tail; far behind this 
are two short, fleshy tubercles, lying in a depression in front of second 
dorsal. Teeth moderate, depressible. Skin everywhere with minute, 
imbedded conical spines. Eyes very small, jdaced higli on the middle 
of the head. D. 1-3 or 4; A. 4; C. 8; P. 10. {Murray.) Deep seas; 
taken at Madeira and otf the coast of Southern [N'ew England. 
{Ceratias uranoscopus Murray, iu Wyville Thonipsou, The Atlautic, ii, 67, 1878; Gill, 
1. c. 228; Goode, Proc. U. S. Nut. Mus. 1880, 469.) 
471. — ©]\3I2<>I>ES Liitken. 
{Oneirodes Liitkeu, Overs. Koug. Dansk. Videusk. Selsk. Forhaudl. 1871, 56: type 
Oneirodcs eschrichtii Liitken.) 
Uead and body compressed, oval, covered with smooth skin. Mouth 
moderate, almost horizontal; vomer with teeth. Gill arches unarmed; 
gills in pairs. Spinous dorsal represented by a rostral spine, the 
basal element of which is procumbent and subcutaneous, aud a second 
spine about midway between the rostral spine and the soft dorsal. 
Greenland, (dvs.'/^wdr^?, dream-like, in allusion to the small, almost 
covered, eyes.) 
1309. O. esclsa’ichti Liitkeu. 
Black; terminal half of the bulb of the cephalic spine whitish. 
Cephalic spine with a bulbous termination, surmounted by slender 
filaments, iu several transverse rows. Caudal flu shorter than trunk, 
without head. D. II-4. Deep sea, off Greenland. {Gill.) 
(Liitken, Dansk. Yidensk. Selsk. Fork. 1871, 57; Gill, Proc. U. S. Nat. Mus. 1878, 
218.) 
