Plate III 



Fig. 14 Hermit crab, forty-one days. First moult forty-one days after operation. Dorsal view. 

 Operation destroyed whole ommatidial portion and upper part of ganglion. Complete eye regenerated. 

 Eye is about two-thirds length of normal eye. X 45. 



Fig. 15 Hermit crab, sixty-seven days. One moult forty-five days after operation. Whole omma- 

 tidial portion and upper part of ganglion destroyed. Regenerated eye fully differentiated. Regener- 

 ated eye two-thirds length of normal eye. X 45. 



Fig. 16 Palaemonetes, sixty-five days. Moulted six days after operation. Eye split. Newomma- 

 tidia regenerated. Regenerated eye six-sevenths length of normal eye. X 45. 



Fig. 17 Palaemonetes Viridis, nine days. One moult nine days after operation. Shows irregular 

 development of upper end of eye. Pigment scattered irregularly. X 45. 



Fig. 18 Ventral view of top of eye shown in Fig. 40. Regenerated material appears loose and 

 reticular. X 90. 



Fig. 19 Palaemonetes, thirty days. Dorsal view. First moult eight days after operation; second 

 moult fifteen days later. Ommatidial portion wholly destroyed. Upper part of eye transparent. Regen- 

 erated tissue forms loose reticulum. No external signs of differentiation of ommatidia. Injured eye 

 seven-eighths length of normal eye. X 45. 



