340 THE FLOUNDER FAMILY. 



and the body is deeply tinted with the same characteristic 

 brownish colour to the vertical caudal bars, black chromato- 

 phores being dotted all over the same region. The marginal fin 

 has a patch of yellowish and brownish with a few black 

 chromatophores just behind a vertical line from the posterior 

 border of the yolk-sac, and thus it agrees with a similar 

 patch in the turbot. As in the latter a bar of yellowish and 

 brownish with a few black chromatophores occurs dorsally and 

 ventrally, but it seems to be better developed in the turbot. 

 Behind the touches mentioned, the brownish pigment of the 

 body soon fades, yellowish-brown taking its place, and finally 

 the tip is pale. The yolk-sac shows a series of black chromato- 

 phores along the upper and anterior arch, and at the oil-globule, 

 brownish corpuscles along the anterior border, and yellowish 

 with a few brown over the posterior half From the foregoing 

 it will be evident that the male parent had a potent influence 

 in the position of the oil-globule, for in the larval brill, described 

 and figured by Ehrenbaum and Canu, the oil-globule is situated 

 near the ventral border of the yolk, somewhat behind the 

 middle (Plate XX, fig. 1). Moreover, the length is 3'77 mm. 

 After absorption of the yolk, Ehrenbaum states that the early 

 post-larval bi'ill has orange-yellow pigment, and resembles in 

 outline the turbot of the same stage. 



The next stage at which the brill has been met with is as a 

 symmetrical pelagic young fish of 6 — 7 mm. (Plate XIII, fig. 8), 

 with an eye on each side and brownish-yellow bars of pigment 

 midway between the vent and the tail, that is, precisely in the 

 position in which we find pigment in the larval fish. Traces of 

 another bar of the same colour behind the latter also exist. 

 Moreover, a brownish-yellow patch occurs in the dorsal fin in 

 front, and the same pigment is found on the head and sides. 

 The head, body, and tail have numerous finely marked black 

 chromatophores, and a few of these occur in the pigment-bars 

 on the fins. This size was reached on the 9th July (1890). 

 No armature exists on the young fish at this stage. The black 

 pigment is more pronounced in a young turbot of the same 

 size. As Dr Petersen' truly says in his interesting discussion 



' Heport of the Danish Zoological Station. 1893. p. 133. 



