52 ZOOLOGY OF THE VOYAGE OF THE BEAGLE. 
delicate ; all the soft rays branched. Vent in a vertical line with the ninth soft ray of the 
dorsal. Anal commencing immediately behind it, and answering to that portion of the dorsal 
to which it is opposite, terminating at the same distance from the caudal ; only two slender 
spines, the first very short ; the first soft ray simple, the rest branched. Space between these 
two fins and the caudal barely one-eighth of the entire length. Caudal nearly even. Pectorals 
moderately long and narrow, equalling nearly the length of the head; rays branched ; fourth, 
fifth, and sixth longest. Ventrals a little in advance of the pectorals, nearly equalling them in 
length; of a pointed form, with the third and fourth soft rays longest. In the axilla of the 
pectorals a vertical scaly membranaceous lamina. 
B. 6; D: 4/28; A. 9/22: C.17; P. 20: V. 1/5: 
Length 11 ine. 5 lines. 
Cotour.—(Jn spirits.) Dusky olive on the back and upper part of the sides, yellowish (probably 
silvery in the recent state) beneath, with faint indications of five or six dark transverse bands, 
similar to those in the common perch. Inside of the ventrals blue. 
Second specimen.—Smaller than the above, measuring six inches and a half in length, but differing 
from it in no respect, as regards form, excepting in having the profile not so oblique, and the 
snout in consequence not so obtuse; the jaws also are exactly equal. Fin-ray formula the 
same. 
CoLour.—“ Beneath brilliant white; head and back clouded with purplish and carmine red ; 
longitudinal and transverse irregular bands of the same.”—D. The bands in this specimen 
amount to eight in number, and are much more conspicuous than in the larger one above 
described. 
Habitat, Valparaiso, Chile. 
The smaller of the two specimens above described was taken by Mr. Darwin 
at Valparaiso. The number attached to the larger one has been lost, but it was 
probably taken at the same place, where it had been previously discovered both 
by M. D’Orbigny and M. Gay. The specimen described by Valenciennes has 
one soft ray more in the dorsal, and one less in the anal, than either of the above ; 
but in all other respects they tally exactly. As observed in the ‘“ Histoire des 
Poissons,” this species has many points of resemblance to Percis and Pinguipes. 
2. LatTiLus prINcEps. Jen. 
Pirate XI. 
L. elongatus ; corporis altitudine capitis longitudinem equanti ; dentibus velutinis, 
serie externa fortiori, aculeiformi; preoperculo margine adscendenti recto, leviter 
