86 ZOOLOGY OF THE VOYAGE OF THE BEAGLE. 
dotted in like manner: also some indication of the larger spot on the first three rays of the 
dorsal: anal with the same dusky edging. 
Obs. Of this species there are five specimens in the collection. The next in size to the 
one described above, measures one inch seven lines in length, and resembles it in every respect, 
excepting that the superciliary filaments are broader and longer, equalling at least one 
diameter and a half of the eye. The colours and markings are exactly the same, only the 
fasciz on the throat can hardly be discerned. 
No. 3 is exactly similar in size, as well as in all its other characters, to No. 2. Has the 
superciliary filaments equally developed. 
No. 4 resembles Nos. 2 and 3, but is smaller, measuring one inch five lines in length. 
No. 5, the smallest of all the specimens, and measuring only one inch three lines, has the 
dark markings more developed, especially the angulated fascize on the throat, which are 
almost as distinct as in the B. fasciatus: the spots beneath the dorsal assume the appearance 
of abbreviated transverse fascie reaching from the base of the fin to the median line; and 
besides the three faintly indicated in the other specimens, there are two others nearer the head, 
forming altogether a series of five. In this specimen the superciliary filaments are shorter, not 
exceeding the diameter of the eye. 
Habitat, Coquimbo, Chile. 
This species differs but slightly from the last, and both may hereafter prove 
to be mere varieties of the B. biocellatus; but it is desirable for the present to 
keep them distinct, as, though all found on the same coast, they are from distinct 
localities on that coast. Also the above five specimens, though varying in the 
intensity of the markings, have all a ground colour quite different from that of the 
B. fasciatus, and a peculiarity of aspect immediately noticeable to the eye. Had 
they been found mixed with that species, the presence of the anal papilla might 
lead to the suspicion of their being the other sex ; but, under the circumstances, 
this seems hardly probable. They were all taken at Coquimbo. 
7. SACARIAS ATLANTICUS. Cuv. et Val. 
Salarias atlanticus, Cuv. et Val. Hist. des Poiss. tom. xi. p. 238. 
Two individuals of this species were obtained by Mr. Darwin at Porto Praya. 
They accord in all respects with the descriptions in the ‘‘ Histoire des Poissons,” 
excepting as regards the fin-ray formula, in which there is a slight difference 
observable ; and in this respect they are also different from each other. 
The larger specimen, measuring three inches seven and a half lines in 
length, has the fin-ray formula as follows : 
ID Nel 2l's As 24: CO. tse sPe tae Wie 
The other, two inches eleven lines in length, has one ray less in the spinous 
portion of the dorsal, and two more in the soft : 
D..12/23; A. 24: &e.— 
