162 FISHES OF SAN DIEGO—EIGENMANN. 
me from visiting their habitat during July, and in August the tides 
were not favorable. 
The earliest date at which I procured young was October 25; the 
smallest caught at that time is represented in Fig. 7. 
Though I did not secure developing eggs, those procured enable me 
to describe the remarkable membranes of the egg, which are probably 
similar in many other gobies. 
The covering of the ovarian egg consists first of a finely striate mem- 
brane, the zona radiata of all telostean eggs. Exterior to this is a net- 
work of threads with the meshes coarsest at the entodermic pole, and 
forming almost a continuous membrane at the ectodermic pole, Figs. 4 
and 5. The eggs were examined from the surface only, and I am not 
able to say how intimate the connection between the threads and the 
zona is in the ovary. When the eggs are deposited the meshwork of 
threads is stripped off the egg and remains attached to the zonaradiata 
around the micropyle, Figs. 1, 2, 3,and 5. In the eggs deposited natu- 
rally by the females in confinement the threads had been wound together 
to form acord at the micropylar end of the egg, Fig. 1. The cords 
of many of these eggs were attached to each other, and the eggs thus 
came to be laid in bunches like those of grapes. The bunches of eggs 
resemble so closely those of the crustacean with which this fish is asso- 
ciated, and which spawns at the same time, that the idea of a highly 
specialized mimicry at once suggests itself. The similarity between the 
eggs is heightened by the fact that they are both bright yellow. In 
females with ripe eggs they can frequently be seen forming a yellow 
band along the flanks. 
The yellow of the blind-fish egg is entirely confined to the yolk which 
contains many oil globules. The granular protoplasm is opaque. 
CHIRIDZ. 
Ophiodon elongatus Girard. 
E. & E., Proc. U. S. Nat. Mus., 1888, 465; E. & E. ’89a. 
Not very abundant, but probably a permanent resident. It is found 
in deep water outside the bay only. The young, so abundant in San 
Francisco Bay, were not seen. 
Zaniolepis frenatus E. & E. 
E. & E. 89a. 
One specimen about 160 millimeters long was taken from the stomach 
of a rock cod on Cortes Banks. 
SCORPANIDA., 
We have been able to largely increase the number of species of this 
family, previously recorded from San Diego, and to make pretty exten- 
sive observations on the seasons of maturity of the various species. 
