74 ZOOLOGY OF THE VOYAGE OF THE BEAGLE. 
firm state of preservation, it is hardly possible to say whether they are new or 
not. In form, they differ but little from the P. cyanophrys of Cuvier and 
Valenciennes : still they are evidently not that species, and one point of 
difference consists in the lateral line, which terminates beneath the end of the 
second dorsal, and is not carried on to the caudal, as represented in the figure of 
the above species in the “Histoire des Poissons:” the eye too appears rather 
larger; the forehead is hardly so much elevated, and the pectorals are shorter 
than the head. Perhaps it may be the P. leucurus of the above authors ; though 
this species is from the Indian seas, so that its range must be considerable if the 
same. The description of the P. deucurus in the ‘‘ Histoire des Poissons” is too 
short to determine this point. It is said to have been so named on account of its 
whitish tail, all the other fins being black. In the present species, the fins are 
likewise black, or at least dusky, except the caudal, which Mr. Darwin’s notes, 
taken from the recent fish, state to have had “ a pink tinge.” In the same notes 
it is added,—* belly silvery white mottled with brownish black ; sides bluish with 
dusky greenish markings; iris yellow, with dark blue pupil.” The fin-ray 
formula is as follows : 
D. 10—1/27; A.3/27; C.17, &c.; P. 17 or 18; V. 1/5. 
Though these specimens are small, they have the appearance of being nearly 
full-sized. Cuvier and Valenciennes state that their specimens of the P. leucurus 
do not exceed two inches in length. 
SrromaTevus MACULATUs. Cuv. et Val.? 
Stromateus maculatus, Cuv. e¢ Val. Hist. des Poiss. tom. ix. p. 296. 
Form. —General form so extremely similar to that of the S. Fiatola of the Mediterranean as to 
preclude the necessity of a detailed description. Greatest depth one-third of the length: head 
one-tifth of the same. Number of rays in the dorsal and anal fins somewhat greater than in 
the S. Fiatola. The height of the dorsal also a little greater, being contained about three 
times and a half in the depth: the fifth and sixth soft rays longest. Fleshy part of the tail 
more slender. Pectorals about the length of the head. 
B. 6; D. 7/41; A. 5/40; C.17, besides several short; P. 23; V. 0. 
Length 8 inches 6 lines. 
CoLour.—‘ Silvery blue above, with regular circular leaden spots.”—D. The spots are small, and 
of nearly equal size: they prevail from the back downwards to about the middle of the depth, 
and advance a little on the base of the dorsal fin. The arrangement of them is much as 
described in the “ Histoire des Poissons.” 
Habitat, Chiloe, West Coast of S. America. 
It is just possible that this may not be specifically the same as the S. maculatus 
of Cuvier and Valenciennes, but it comes so extremely near that species that I do 
