CRUSTACEA. 411 



appendages, accompanied by a pair of larger two-jointed ones, 

 attached to the minute terminal representative of the ab- 

 domen. 



Fig. 3. Nymphon hirtipes. 3 , oculigerous footstalk seen 

 from above. 3 b, chelae (footjaws). 3 c, one of the first pair 

 of articulated appendages (palps of footjaws). 



Fig. 4. Nymphon robustum. 4 a, a chela or footjaw. 4 b, 

 palp of footjaw, or first articulated appendage. 4 c, one of the 

 ovigerous appendages. 4 d, one of the same in one of the 

 young ones attached to 4 c. 



For the elaborate anatomical details of the Plates, and for 

 the greater part of the description of them which I have 

 adopted, I have to acknowledge my obligation to Mr. West- 

 wood. 



