20 (19) First legs subchelate, dactyls fold- 

 ing to reflexed position when closed 

 . . .Family Laomediidae, Naushonia crangonoides 



Figure 42. — Naushonia crangonoides; A, carapace, 

 dorsal view; B, subchela of first leg. 



T 



2 

 1 



20 (19) First legs either chelate or approaching subchelate condition, but never with dactyls 

 folding to reflexed position when closed 



21 



21 (20 ) Rostrum prominent, extending beyond 



eyes 22 



21 (20 ) Rostrum short; flattened, pointed eyes 



fully exposed Family Calli- 



anassidae Callianassa atlantica 



Figure 43. — Callianassa atlantica; A, carapace and eyes, 

 dorsal view; B, major chela of male. 



22 (21 ) Rostrum hairy and nearly flat, few 

 teeth along sides, flanked on each 



side by large spine 



Family Upogebiidae, Upogebia affinis 



Figure 44. — Upogebia affinis; A, carapace, 

 dorsal view; B, chela. 



16 



