430 



BULLETIN OF THE BUREAU OF FISHEBIES 



ends abruptly some distance in front of the tail. Haddock of this size show much 

 less pigment (p. 444). Cod fry of 15 to 30 mm. may be recognized by the location 

 of the vent under the second dorsal fin, combined vdth. dense pigmentation. The 

 dorsal and anal fin rays begin to appear at a length of 10 to 13 mm.; at 20 mm. 

 they have attained their final number and the separate fins are outlined; while at 

 30 mm. the frj' begin to show the spotted color pattern so characteristic of the cod. 



Fig. 214.— Localities where cod (#) and haddocli (A) larvse have been taken in the tow nets 



An important cjuestion for future solution is: What proportion of the cod 

 larvffi hatched on the Gulf of Maine spawning groimds survive? We have no data 

 whatever to offer on this, nor do we think it ■wise to draw anj- conclusions from 

 the fact that we have taken few cod larvse in our tow nets (only 80 or 90 all told), 

 because this may have been purely accidental, due to the fact that we have 

 made few hauls in Ipswich Bay or the southern part of Massachusetts Bay and 

 none on the offshore spawning grounds at the critical season. 



