42 UNIVERSITY OF MISSOURI STUDIES [23O 



4. In the other thoracic appendages regeneration is simi- 

 lar to the same process in the cheHpeds. 



5. In both cheHpeds and ambulatory appendages, if an in- 

 jury occurs near the tip, the limb is not thrown off at the break- 

 ing joint, nor is there any apparent regeneration before a moult 

 takes place. At the time of a moult the appendage appears re- 

 stored. 



6. The flagella of the antennae and antennules are readily 

 regenerated when broken off at the base. When broken off at 

 higher levels I. have never definitely determined that regenera- 

 tion occurs. 



7. I have not found that the swimmerets, i. e., the second, 

 third, fourth and fifth abdominal appendages, regenerate. Ex- 

 periments, however, on these parts were not extensive. 



8. In the male the first pair of abdominal appendages re- 

 generate. These appendages are modified as accessory repro- 

 ductive organs. 



9. The telson and also the sixth pair of abdominal append- 

 ages, which with the telson form the tail-fin, are regenerated. 



10. Parts of the exoskeleton and the gills were experi- 

 mented upon without definite results. 



11. When only the distal part of the eye is removed an 

 apparent regeneration takes place in a very short time. Exami- 

 nation, however, shows that true functional regeneration has 

 not occurred. The ommatidia are not regenerated and in only 

 one instance have I found any indication at all that the corneal 

 facets were being restored. The eye usually develops in an 

 irregular, abnormal form, the irregularity sometimes being due 

 to the unequal development of the cuticle and sometimes to the 

 tissues beneath. 



12. When the whole eye is removed regeneration may or 

 may not take place. If any structure is regenerated it is not 



