80 On a new Loricariid Fish from Ecuador. 
Skull: greatest length 179-0; condylo-basal length 173-0 ; 
greatest breadth 84°6 ; interorbital breadth 54:4; length of 
nasals 52°2; gnathion to orbit 92:0; gnathion to tooth- 
row 53°3 ; maxillary tooth-row 59°6 ; molar series 34°3. 
This roedeer can be readily distinguished from the other 
European forms by the decided tawny-yellow colour of the 
winter pelage. 
XIL—A new Loricartid Fish of the Genus Cyclopium from 
Ecuador. By C. Tate Reaan, M.A. 
(Published by permission of the Trustees of the British Museum.) 
Cyclopium mindoense, sp. n. 
Length of head 4 in the length of fish. Interocular. width 
equal to distance from eye to posterior nostril, 4in the length 
of head. Nasal flap produced into a barbel; maxillary 
barbel extending to base of pectoral; teeth acute, those of 
outer series of preemaxillaries unicuspid except 3 or 4 median 
teeth, which are bicuspid; mandibulary teeth bicuspid. 
Anterior ray of dorsal a little longer than head ; outer ray of 
pectoral produced, nearly } length of fish; outer pelvic ray 
as long as anterior ray of dorsal. Adipose fin elongate, 
extending on to caudal fin, with a well-developed spine that 
extends to its free margin, but tapers off below, and appears 
not quite to reach its base ; spine separated from caudal by a 
space equal to } the length of the middle rays of that fin. 
Anus equidistant from vertical through origin of dorsal and 
last ray of anal, its distance from first ray of anal 3 the length 
of the fish. Distance from snout to origin of dorsal fin 22 in 
the length of the fish, from last ray of anal to caudal 7. 
Body with irregular dark spots; anal and caudal dark at 
base ; caudal also crossed by a dark bar. 
A single specimen, 65 mm. in total length, from Mindo, 
Western Ecuador, collected and presented to the Natural 
History Museum by Mr. W. Goodfellow. 
This species is related to C. cirratum, Regan (P. Z. 8. 
1912, p. 670), from Western Colombia, which differs espe- 
cially in the more posterior position of the vent (scarcely 
nearer to vertical through origin of dorsal than to base of 
caudal, separated from anal fin by a distance equal to } the 
length of the fish), and in the more normal structure of the 
spine of the adipose fin. C. ventrale, Eigenmann (Indian 
Univ. Bull. x. 1912, no. 8, p. 15), is, as Kigenmann thought 
likely, a synonym of C. cirratum, 
