KEY TO THE PYCNOGONIDA, MAINE TO NEW JERSEY 



1 Chelifores and palpi distinctly present 2 



1 Chelifores or palpi, or both, lacking or greatly reduced 8 



2 (1) Chelifores well developed, overreaching proboscis; palpi 



five-jointed NYMPHONIDAE . . 3 



2 (1) Chelifores shorter than proboscis, and chelae reduced to knobs; 



palpi seven to nine-jointed AMMOTHEIDAE . . 7 



3 (2) Tarsus half as long (or less) as propodus. 



Nymphon hirtipes 



propodus 

 \ 



tarsus 



3 (2 ) Tarsus almost as long or longer than prop- 

 odus 



