54 BULLETIN OF THE 
In a specimen about 0.9 of an inch long the color cells were well 
formed, and the membranes of the fins were thin (in the adult the fins 
are very thick in proportion to their height). The movements of the 
fish at this age were similar to those of the other gobies, and not at all 
sluggish, like those of the adult. In the adult, says Eigenmann, “the 
color has been reduced.” 
The eyes have suffered the greatest change of all. In the small 
specimen just mentioned they were quite evident, and apparently func- 
tional. “Objects thrust in front of them are always perceived, but the 
field of vision is quite limited. With age the skin over the eyes thick- 
ens, and they are scarcely evident externally. As far as I could deter- 
mine they do not see at this time, and certainly detect their food chiefly, 
if not altogether, by the sense of touch.” 
“The lens is large in proportion to the size of the eye, which does not 
materially differ in size in the smallest and largest specimens exam- 
ined. The optic nerve is slender and long as compared with that of any 
of the other gobies.” Because of lack of facilities for histological work, 
Prof. Eigenmann did not study the minute structure of the eyes. All 
his attempts to get material for studying the development were unsuc- 
cessful, though artificial fertilization was tried, and many visits were 
made to Point Loma in search of eggs and embryos. The spawning 
time is June and the latter part of May. 
During the last of June and the first of July, 1891, I was able to 
spend several days at San Diego, but at that time it was impossible 
to get specimens of the blind fish, a thing which I had greatly hoped 
to do. From Dr. Eigenmann’s experiences I had thought it quite possi- 
ble that at this time I might also be so fortunate as to get embryonic 
material of the species. On arriving at San Diego my hopes were at 
once annihilated, however, as I found that the fish could be caught only 
at the very low tides, and at this time of the year these tides come in 
the night. I arranged, however, with two local collectors, Mr. L. C. 
agg and Mr. O. N. Sanford, to have all the specimens they could 
obtain, as soon as the tides would permit of their being collected, sent 
to me at Berkeley. By this means I secured twenty-two specimens, the 
most of them apparently fully grown, though two were considerably 
smaller than any I had previously studied, and these were all carefully 
preserved in Perenyi’s fluid. 
Through the kindness of the officers of the Pacific Coast Steamship 
Company’s steamer “Pomona,” twelve specimens were sent to me in 
July from San Diego alive. Only four of these were living, however, 
