FISHERY BULLETIN: VOL 76, NO. 2 



0.5 mm 



1 . mm 



Figure L — Stage I zoea of Lebbeus groenlandicus: I, third maxilliped; J, first pereopod; K, third pereopod, L, first pleopod; M, second 



pleopod; N, telson. 



well developed. Incisor process of left mandible 

 bears five teeth, one of them located near movable 

 premolar denticle (lacinia mobilis), in contrast to 

 triserrate incisor process of right mandible. Both 



mandibles bear well-developed denticles along 

 terminal margin. Truncated end of molar process 

 of right mandible formed into curved lip. Only left 

 mandible bears a subterminal process. 



460 



