PLATE III. 



Xystocheir obtusa. 



FIG. i, a. Gonapods, anterior view. 

 I, b. Gonapods, lateral view. 



1, c. Gonapods, posterior view. 



Scytonotus sp. 



FIG. 2, a. Gonapod, mesial view. 



2, 3. Gonapod, lateral view. 



2, c. Eighteenth leg, posterior view. 



2, d. Nineteenth leg, posterior view. 



Tylobolus deses. 



FIG. 3, a. Head, first segment, and first pair of legs, posterior view. 



3, b. Second pair of legs of male, with ventral lobes of second segment, 



posterior view. 



3, c. Third leg of male, posterior view. 

 3, d. Basal joint of same, mesial view. 

 3, e. Fourth leg of male. 

 3, f. Fifth leg of male. 

 3, g. Gonapods, anterior view. 

 3, //. Gonapods, posterior view. 



(78) 



