448 
PACIFIC SCIENCE, Vol. XX, October 1966 
bers of the California State Fisheries Labora- 
tory and the Inter- American Tropical Tuna 
Commission have captured a variety of fish, in- 
cluding juveniles of Scomberomorus. As will 
be shown later, there is reason to believe that 
most likely all of these Scomberomorus speci- 
mens are young of S. sierra. The information 
pertaining to these collections is summarized in 
Table 1. Also included in the table are data 
kindly provided by other scientists, as well as 
published data. The geographical distribution 
of the catches, all of which originated from 
coastal waters, is shown in Figure 1. 
An 11 -mm S. sierra collected off Punta Foca, 
Peru in January 1956 is illustrated in Figure 2. 
The head, with its long snout, and the large 
jaws beset with numerous teeth are characteris- 
tic of young sierra at this stage and serve to 
distinguish it readily from other scombroids of 
similar size. Juvenile Scomberomorus are also 
Fig. 1 . Localities of capture of juvenile Scomberomorus sierra in the eastern Pacific Ocean. 
