128 FISHES OF SAN DIEGO—EIGENMANN, 
Another egg was found August 28, and is represented in fig. 8. The 
tail is much developed and the pigment more conspicuous. 
On hatching the yolk sack is 0.80 millimeter long, and the total 
length of the larva (fig. 9) is 1.4 millimeters. The globule is well pig- 
mented and there are a number of chromatophores on the yolk sack 
below, in front of the globule. The chromatophores are pretty evenly 
distributed over the fish. 
Species No.2. Pleuronichthys ccenosus ? Plate x, figs. 10-13. 
A single egg of this species was found April 26, at 12:30 p.m. The 
marginal infolding of the gastrula was well begun. 
The egg was smaller than that of Hypsopsetta and was supposed to 
be that of Pleuronichthys cenosus. Itmeasured 0.71 millimeter in dia- 
meter and the single small globule was scarcely more than 0,08 milli- 
meter in diameter. 
The blastopore closed somewhat over seven hours after the stage 
represented in fig. 10. Nineteen hours after fig. 10 pigment has been 
formed, the embryo is comparatively narrow. In place of Kupffer’s 
vesicle there was a double vesicle, one behind the other, as represented 
in figs.11 and 12. This was in all probability a pathological specimen. 
In the figures only black-pigment cells are drawn; in later stages 
numerous greenish-yellow cells become prominent wherever there are 
black ones. They are especially abundant about the head and on the — | 
body near the end of the yolk sack. 
SUMMARY OF THE DAILY OBSERVATIONS. 
The following lists are an abridgment of the detailed records kept 
for the species. 
The following abbreviations have been used: 
b. Found in San Diego Bay. 
2 or 6. Ripe female or male, or female with young if a 
Viviparous species. 
e. Eggs were procured (usually by skimming). 
y- Young were taken. 
a. Abundant. 
f. Few. 
c. Common. 
Numbers ordinarily indicate the date of the month when specimens 
were seen. Thus, after No. 11, August 20, 28, indicates that specimens 
were taken on August 20 and 28. If a number is followed by an * if 
indicates the number of specimens taken. Thus, under No. 59, October 
31, 1* indicates that one specimen was taken on October 31, ete. 
nak nwigenon ail 
a 
