MUSEUM OF COMPARATIVE ZOOLOGY. 53 
It was still quite active five hours after it was removed from among the 
dead fishes. How much longer it may have been able to survive I do 
not know, as I then killed it with alcohol.” 
In a paper on the “ Point Loma Blind Fish and its Relatives,” Prof. 
C. H. Eigenmann (’90, pp. 65-71) has given some very interesting facts 
on the habits of the species, and also the only account, so far as I am 
aware, of some of the profound structural changes that have been 
induced in it by its peculiar way of living. 
The fact that the fishes pass their lives under stones ‘in crab holes, or 
buried in the sand, must of course have been known by every one who 
had collected them ; but as Prof. Eigenmann has had much better op- 
portunity to study their habits than has any one else who has written 
on the subject, his account is quite full, and so interesting that I repro- 
duce a considerable portion of it. 
About San Diego the fish has been found at Point Loma only; it 
has been taken, however, at Encenada. Its habitat is consequently, so 
far as known, quite limited. The crustacean in the holes of which and 
with which it lives is a burrowing carideoid, which, has the same pink 
color as the fish ; but while the crustacean is found throughout the en- 
tire bay region, the fish is its companion only at Point Loma. Another 
species of the Gobiidz, belonging to the genus Clevelandia, also fre- 
quents the holes of the same crustacean along with Typhlogobius. ? 
“Sometimes the fishes [other than the blind fishes ?] live quite out of 
water on the damp gravel and sand under rocks. . . . In the bay the 
gobies habitually live out of the holes, into which they descend only 
when they are frightened, while at Point Loma they never leave their 
subterranean abode, and to this fact we must attribute their present 
condition.” 
It is not the eyes alone that have undergone modification. The 
whole frontal region of the skull has been profoundly changed ; the 
scales have entirely disappeared, the color has been reduced, and the 
spinous dorsal has been greatly diminished in size. “The skin, and 
especially that of the head, has become highly sensitized.” 
1 T find Clevelandia in San Francisco Bay at West Berkeley; and here it often 
enters holes in the mud with a species of Crangon. In this case the holes are not, 
I think, dug by the crustacean. The general appearance and actions of the two 
animals are so similar that at a little distance it is very easy to mistake the one for 
the other. The color of the two is absolutely indistinguishable as they rest at the 
bottom of the shallow tide-pools ; and it is so like the dark brown mud of the bot- 
tom on which the animals are found that it is with great difficulty that they are 
seen when not in motion. 
