392 CALIFORNIA ACADEMY OF SCIENCES. 20 
Color bluish black with many round yellowish spots 
scattered equally over the back and ventral fins; spots about 
as large as eye on back, smaller on head, sometimes two 
spots run together forming an elliptical spot, about sixteen 
spots from eye along anterior margin of pectoral to lateral 
angle; posterior margin of pectoral very narrowly mar- 
gined with white; ventral side pearly white. 
From the description of £¢tobatus laticeps this species 
differs in the following respects: disk not so broad; tail 
not so long; width of head and snout less; ventrals not 
truncated behind; pectorals not margined with blackish; 
spots on ventrals not assuming the form of ocelli. 
Five large specimens obtained; length of disk in each, 
LS inches: 
This description has been compared by Dr. Barton W. 
Evermann, with specimens of .#¢tobatus narinart from 
Brazil. No difference of any importance appears, and 
in his judgment the Atlantic and Pacific Coast American 
forms are identical. 
Notrr.—This species has been several times obtained 
by Dr. Gilbert and others in the Gulf of California, hav- 
ing been identified as tobatus laticeps of Gill. It does 
not, however, agree with Dr. Gill’s description and there ~ 
is no evidence that his specimen came from Mexico. &/o- 
batus laticeps was described from an example from un- 
known locality received from San Francisco. It is there- 
fore quite as likely to have come from Honolulu or from 
China, as from the Gulf of California. 
The following is Dr. Gill’s description: 
‘* A étobatts laticeps Gill. 
‘«The greatest width is rather move than twice as great 
as distance from snout to front of anus. The head is 
broad and nearly equals the distance from snout to divis- 
ion of nasal lobes. The snout is obtusely angulated in 
front, and at its sides is convex and scarcely angulated; 
