PLATE XX. 



Fig. 1. Galacantha talismanii, A. Milne-Edwards (?), 



a. Lateral view of trunk, 

 h. Left external maxillipede, 



Fig. 2. Ptychogaster milne-edwardsi, Henderson, 



a. Under surface of trunk, 



b. Under surface, showing the abdomen folded naturally, 

 c Left external maxillipede. 



Fig. 3. Ptychogaster Iwvis, Henderson, 



Upper surface of trunk, 



a. Eight chela of female, 



6. Portion of the third left ambulatory leg, 



c. Left external maxillipede, 



