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 

 fascise 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 fascias on the throat, which are 

 almost as distinct as in the B.fasciatus : the spots beneath the dorsal assume the appearance 

 of abbreviated transverse fasciae 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 JB. 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. Salarias atlanticus. Cuv. et Vol. 



Salarias atlanticus, Cuv. et Vol. 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 : 



D. 13/21 ; A. 24; C. 13; P. 15; V. 2. 



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; &c— 



