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| PROCEEDINGS OF THE NATIONAL MUSEUM. 15) 
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found throughout the remainder of August. The blastopore closes in 
about eighteen hours, and the embryo is freed in about thirty-eight 
hours. On hatching the embryo measures 1.7 millimeters, the yolk 
sack 0.65 millimeter. 
At the time of the closing of the blastopore a few color cells are seat- 
tered over the yolk near the oil globule; a yellow pigment is pretty 
evenly distributed along the sides of the embryo. This yellow pigment 
shortly becomes collected in well-defined areas along either side of the 
embryo, and at the time of hatching there is a mass of cells at the 
snout, one behind each eye, one behind each auditory capsule, four just 
behind the yolk sac, and two or three on the anterior half of the tail. 
A few black cells are scattered along the back. These cells soon be- 
come dendritic to such an extent that there is little similarity between 
the larva at hatching and twelve hours afterward. 
At the time of hatching the larva measures 1.7 millimeters, the yolk 
sac 0.65 millimeter. The oil globule, as in nebulifer and atrarius, is 
embedded in the anterior end of the yolk. 
The color cells in the case of P. maculofasciatus do not, as in the cases 
of Sciena and Hypsopsetta, all become free. Sketches of this species 
were made a few moments apart (see Am. Nat., february, 1891). The 
color cells are first noted when the gastrula covers about two-thirds of 
the yolk. At this time no pigment is deposited in them and only those 
which are freed from the embryonic shield can be distinguished. Very 
few of the cells ever become freed from the shield and all those that are 
freed are destined for the oil globule. The great majority of color cells 
remain attached to the margins of the shield. They migrate, however, 
as is seen in their shortly aggregating in definite regions of the body. 
Paralabrax nebulifer (Girard). Kock Bass. 
Steindachner, Ichthyol. Beitr., I1I, 1, 1875; R. Smith, ’80; J. & G., ’80a, 456; id., 
°81, 47; id., °83, 586; R. Smith, ’85, July; E. Am. Nat., Feb. 1891, figures. 
This species is found in the bay with the preceding. 
But two eggs of this species were observed, one on June -25 and 
the other on August 26. In this species only black pigment cells are 
formed. The embryo is freed from the membrane in thirty-six hours 
and measures 22 millimeters; the yolk sack measures 1.3 millimeters. 
On the body the black cells are confined to the dorsal surface, while on 
the tail they are more uniformly distributed. The oil globule is situ- 
ated at the anterior end of the yolk. 
Stereolepis gigas Ayres. Black Sea Bass. 
J. &G., 80, 27; R. Smith, ’80; J. & G., ’80, 456; id., ’81, 47; id., 82,531; R. Smith, 
85, July; E. & E., ’89. 
IT am not certain whether this species is migratory or not, but am 
inclined to believe it is. It is not very abundant, but a number can 
always be taken, at least in certain seasons, by using the proper gear 
BS iy, 
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