288 



MORGAN. 



[VOL. I. 



I. Description of tlie Appendages. 



II. The Percentage of Appendages Lost under Natural Con- 

 ditions. 



III. Experiments on Regeneration. 



IV. Conclusions. 



FIG. i. Third pair of walking legs. FIG. 2. Next to last thoracic leg. FIG. 3. Last thoracic 

 leg. FIG. 4. First abdominal appendage of male (belonging to second segment). FIG. 5. 

 Second abdominal appendage of male. FIG. 6. Third abdominal appendage of male. 

 FIG. 7. Telson and sixth segment with last pair of abdominal appendages. 



