478 DR. GUNTHER ON THE FISHES OF CENTRAL AMERICA, 
with from four to seven short setiform spines. Posthumeral ridge rather distinct. Each 
scute is variegated with dirty yellow and dark brown. 
I have received of this species only a single skinned example, 12} inches long; it is 
from Veragua. 
226. CHatostomus cirRHOosus (Val.). 
Messrs. Kner & Steindachner (/. ¢. p. 61) mention this species from the Rio Chagres ; 
but their species is probably distinct from it. 
227. LoRicARIA URACANTHA. 
Kner & Steindachner, Abhandl. bayer. Akad. x. p. 56, Taf. 6. fig. 3. 
Snout broad, of moderate length; eye of moderate size, with a notch in its posterior 
margin, its horizontal diameter is one-half of the width of the interorbital space, which 
is slightly concave, owing to the raised supraorbitals. Eight or ten rather large bifid 
teeth in each jaw. Labial folds broad, with numerous papillae, and a small lateral 
barbel. The lower side of the head naked; scutes of the neck but very indistinctly 
bicarinate. LL. lat. 27. There are seven lateral scutes between the pectoral and ventral 
fins. ‘Thorax and belly with numerous smali irregular scutes. ‘The origin of the dorsal 
is opposite to that of the ventrals. ‘The length of the outer pectoral ray is contained 
six times and a half in the total (without caudal). The upper caudal ray very thick and 
strong. Rays of all the fins spotted. 
Pacific and Atlantic rivers of Panama. 
229, Macropon microueris (Gthr.). 
The fish described by Messrs. Kner and Steindachiner (/. ¢. p. 28) under the name of 
M. tareira belongs to this species. 
206, TETRAGONOPTERUS &NEUS (Gthr.). 
This species has been recognized in a collection from Panama by Messrs. Kner and 
Steindachner (/. ¢. p. 46). 
237, CHALCINOPSIS DENTEX. (Plate LXXXIL. fig. 1, 3 nat. size.) 
Brycon dentex, Giinth. Proc. Zool. Soc. 1860, p. 240. 
Chalcinopsis dentex, Giinth, Fish. y. p. 337. 
D.11, A. 35-36, LL. lat. 48-55. L, trans. Sy, Vert. 23/22. 
‘The height of the body is contained thrice and one-fourth or thrice and one-third in 
the total length (without caudal), the length of the head four times and one-third or 
four times and two-thirds, ‘The maxillary does not quite extend to below the centre of 
the eye. Snout as long as the eye in young examples, but much longer in adult ones. 
Interorbital space conyex, its width being much more than the diameter of the eye in 
