Plate V 



Fig. 26 Palaemonetes, twenty-four days. First moult ten days after operation; second moult four- 

 teen days later. Right eye removed at level of line a-b. Small bud of new tissue, t, Regenerated from 

 stump. Cuticle removed from stump. X 45. 



Fig. 27 Stump shown in Fig. 26 more highly magnified. New tissue darkly shaded. X 125. 



Fig. 28 Hermit crab, twenty-four days. One moult twenty-two days after removal of eye. Hetero- 

 morphic appendage. Ventral view. Cuticle heavy, appendage irregularly segmented. Sensory hairs 

 developing near tip. Nerve trunk visible beyond proximal half of segment. Nerve trunk small in 

 diameter as compared with Fig. 30. Appendage three-fourths length of normal eye. X 90. 



Fig. 29 Palaemonetes, twenty-five days. One moult. Outline of normal eye and eye stump show- 

 ing abnormal pigment. Pigment in a number of small masses on upper distal end of stump. X 75. 



Fig. 30 Hermit crab, twenty-two days. Moulted twenty-two days after operation. Heteromor- 

 phic appendage. Dorsal view. Show segments, sensory hairs and ner\'e trunk extending beyond prox- 

 imal half of appendage. Appendage one-third length of normal eye. X 125. 



Fig. 31 Hermit crab, twenty-six days. One moult twenty-six days after operation. Dorsal view 

 of normal eye and healed over stump. Stump three-eighths length of normal eye. X 45. 



