184 



FISHERY BULLETIN OF THE FISH AND WILDLIFE SERVICE 



Examining in greater detail the distribution in the successive cruises, two con- 

 centrations were evident within the area over which the larvae of this series were dis- 

 tributed. One may be called the northern center; the other, the southern center. 

 The northern center was off the northern part of New Jersey (New York II) u in the 



76* 74* 72' 70° 



Fiouke 13.— Location on successive cruises during 1932 of the population of mackerel comprising the S group, as indicated by the 

 relative concentration of larvae of appropriate sizes. The Arabic numerals at the ends of rows of stations give the day of month 

 on which each row was occupied. 



early egg stages. In the successive cruises it may be traced to the north central coast 

 of New Jersey (Barnegat I), to the southern part of New Jersey (Cape May II, III, 

 Atlantic City II), back to the south central portion of the New Jersey coast (Atlantic 

 City I), to the north central portion (Barnegat I), to the northern portion (New York 

 II) , to the offing of Long Island (Shinnecock II and Montauk III) , to the Long Island 

 coast (Shinnecock I and II), and finally to the offing of eastern Massachusetts (Chat- 

 ham II and Cape Anne II). 



" For location of this and below-mentioned stations see fig. 14. 



