No. 6.] 



LIABILITY TO INJURY. 



295 



antennules, and maxillipeds were cut off; and I also repeated 

 the experiment of removing one or more of the first three or 

 four (9) abdominal appendages. 



Eyes. - - In ten individuals the pigmented tip of the eye was 

 cut off, and in ten others the eye-stalk was cut off at or near 



18 



21 



23 



FIGS. 12, 13. Eyes regenerating from distal end of stalk. FIGS. 14, 15. Antenna-like structures 

 regenerating from base of old eye-stalk. FIGS. 16, 17. Antennae regenerating. FK,. iS. 

 Maxilliped regenerating. FIG. 19. First walking leg regenerating. FIG. 20. Left last 

 abdominal appendage regenerating. FIGS. 21, 22. First and second abdominal appendages 

 regenerating. FIGS. 23-25. First, second, and third abdominal appendages of male regen- 

 erating. (Drawn to same scale as preceding figures.) 



its base. Eight individuals that had the tip of the eye cut off 

 were alive at the end of the experiment, and seven of these had 

 a new pigment spot at the end of the old stalk (Figs. 12, 13). 

 In some cases a sharply defined, oval, pigmented body was 

 present, and two of these, when cut into sections, showed that 

 a new eye was in process of development. 



In the other ten individuals, in which the eye-stalk had been 

 cut off near its base, five had regenerated a new part, and five 

 had not ; but in this experiment the new organ was antenna- 

 like (Figs. 14, 15). Herbst also found that when the eyes of 



