494 CALIFORNIA ACADEMY OF SCIENCES. I22 
202. Awaous tajasica (Lichtenstein). ABoMA DE Rio. 
Found in company with Phzlypnus lateralis, from which 
most fishermen scarcely distinguish it. It is rather 
less abundant in the river, and was not noticed by us in 
the Astillero. Elsewhere on the coast it has been recorded 
only from the river at San José del Cabo in Lower Cal- 
ifornia, where it was found by Mr. Lyman Belding and 
more recently by Dr. Gustav Eisen. 
Comparison with specimens from Havana shows no 
differences. 
203. Gobius soporator Cuvier & Valenciennes. Car- 
MAN. 
Found in abundance in all rock pools, ascending far- 
ther above the low-tide mark than any other marine spe- 
cies. It does not occur in fresh water. There seems to 
be no difference between these specimens and those trom 
the Gulf of Mexico, where it is found everywhere in 
water not exceeding two feet in depth. 
204. Gobius sagittula (Giinther). 
A few small specimens, not over four inches in length, 
found in the Astillero on muddy bottoms. It was also 
taken by Dr. Gilbert at La Paz, Mazatlan and at Panama. 
Gobius longicauda, described by Jenkins & Evermann 
from Guaymas, is no doubt the adult of the same species, 
as Dr. Gilbert has already indicated. 
Head 4%; depth 64%; caudal 2 longer than head; eye 
3% in head; maxillary 2%; snout 3%; scales about 52, 
the first 37 very small; dorsal VI-13; anal 14; skull with 
a median lengthwise ridge; interorbital space narrow, 
channelled; skull somewhat broader behind; scales before 
dorsal minute; head naked; scales ctenoid, much. re- 
duced anteriorly; lower jaw short, included; no flaps on 
shoulder girdle; maxillary reaching to pupil; dorsal spines 
