Platk XXII. 



Fuj. I. Right c'heliped before autotomy. The basiopodite (3) and isclii- 

 opodite (2) are seen united at the joint or breaking plane (1). Postero- 

 ventral view. 



Fu/. II. Tlie same basiopodite (o) and ischiopodite C2) separated at tlie 

 breaking plane (1) by antotomy. Over the broken surface of the basioi)o- 

 dite is seen the membraneous plate (4) of the breakhig plane, perforated 

 at the center by the blood vessels and nerve. 



Fi(j. III. First right leg before antotomy. c:i\ coxopodite ; is, ischio- 

 podite ; lue, meropodite ; cp, carpopodite ; jjr, propodite ; dr. dactylopo- 

 dite. The levels Idh, Sdh, 3dh, and tlie joints -2, o, and 4, indicate the dif- 

 ferent regions at which the limbs were cut in the experiments. Posterior 

 view. 



Fi</. IV. Basiopodite of lirst left leg, showing ;] mm. regenerating bud, 

 15 days after antotomy. 



Fig. y. Illustrates three levels at which the basiopodites were cut in 

 the experiments : pc, just below the surface of the breaking plane ; })h. 

 tlm middle of the segment ; and ^jo, at the joint between the basiopodite 

 and coxopodite. 



Fkj. VI. .Second right leg which regenerated from the central region 

 of the second terminal segment or propodite. The propodite was cut at 

 the level {Idb). The renewed part (rey) was regenerated in two months 

 and eleven days. 2, S, and 4 correspond to the same joints as in Fig. III. 

 (All drawings made from life, f nat. size.) 



