rrrr cr^- 



Pardoliscidae 



C Melphldippidae 



^ t=^ ccm 



° ™^ nzn 



Graph 1. — Pattern of evolution in the Gammaridea (see text for discussion). Symbols: 

 A-l=antenna 1; B=conical mouthpart field; C=coxae 1-3; F=accessory flagellum; 

 G-1 (or On. 1), 2=gnathopods 1, 2; H=head; M=mandible, arrows pointing to special 

 features; 0=accessory flagellum absent; P=Maxilliped; circles = plates, appendage = 

 palp; p-1, S=pereopods 1, S; T=telson, fleshy kind, lateral view; U=urosome; U-2, 

 3=uropods 2, 3; X= maxilla 1. 



