Larvae from five different cruises representing three major con- 

 centrations of larvae were examined. A seasonal variation in size was ob- 

 served. Larvae taken in March and April were the largest, the June group 

 smallest, and those in September were intermediate. The difference in size 

 was not due to these groups being composed of different species, since the 

 morphological differences noted previously were found in each group and 

 compensated for. There seems to be, then, a seasonal variation in size, 

 which can in turn be correlated to temperature. When the temperature is 

 low, the larger larvae are encountered, and when the temperature is high, 

 the smallest larvae are found. 



90 -1 



85 



uj 80 

 q: — : 



^^ 

 QC^ 75 



»- 70 



65- 



60 



/ 



MAR 



APR 



-Temperature 10' below surface 



-Temperature 10' above bottom 



A-Largest larvae found 



B -Smallest " " 



C- Intermediate larvae found 



1 1 \ \ 1 I 



MAY JUN JUL AUG SEP OCT NOV 



The relationship between larvae size and 

 bottom temperatures. 



30 



