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[VOL. II. 



of the Pycnogonids, largely as they regarded them homologous 

 to the appendages of the Crustacea or to those of the Arach- 

 nids. Dohrn obviates this difficulty by simply numbering them 

 in their natural order, I-VII (Fig. i). 1 For convenience I 

 shall speak of the third pair as the ovigerous legs (these are 

 absent in the female of Anoplodactylus), and of pairs IV-VII 

 simply as the first, second, third, and fourth pairs of legs 



IV 



VII 



I.- IG ,_ _ Male Anoplodactylus lentns, dorsal aspect : at>., abdomen ; oc., oculiferous tubercle ; 

 pr., proboscis ; I, chelifori ; III, ovigerous legs ; IV-VII, walking legs, x 3. 



respectively, or, to distinguish them from the ovigerous legs, 

 as the walking legs. Each of the walking legs is composed of 

 nine joints (including the terminal claw), and all four pairs are 

 essentially alike. As may be seen by reference to Fig. 2, the 

 first three joints in Anoplodactylus are short and capable of 

 comparatively little motion, while the fourth, fifth, and sixth 

 joints are long, most of the movement of the leg taking place 



1 The second pair of appendages, the "palpi," are absent in Anoplodactylus 

 and Pallene. 



