GAMMARIDEAN AMPHIPODA 



9 



small number of flagellar articles, are largely those of a juvenile. 

 Other differences are the slightly longer first antennae, the slightly 

 larger tooth of the third pleonal epimeron, the presence of coxal 

 notches and the slightly different shape of the posterior lobe on 

 pereopod 5. 



Figure 2. — Ampelisca species, ?male, 2.9 mm, 7358: a, head with offset flagelUim of an- 

 tenna 2; b, pleon; c-e, coxae 4,2,1; /-i, pereopods 1,3,4,5;/, uropod 3; k, telson. 



