Plate X 



Fig. 52 a, b, c, d and e shows series of figures from an eye of Palaemonetes representing transforma- 

 tion of corneal hypodermal cells into active regenerating hypodermis. Shows normal corneal hypoder- 

 mal cells together with corneal facets and tops of cones in a and h. Transformation of cells from resting 

 corneal hypodermal cells to active regenerating cells in c and d. These form a continuous series. 

 X 1350. 



Fig. 53 Section of eye of Palaemonetes from which part of the ommatidial region was removed. 

 Shows new cuticle and reticular subcuticle. Transformed hypodermal cells in process of amitotic divi- 

 sion. To the left a single cell which may be undergoing mitotic division. Experiment covered twenty- 

 three days. Moulted twice. Section taken from same eye as series in Fig. 52. X 1350. 



Fig. 54 Sections from same eye as Figs. 52 and 53. This section shows cells separating from the 

 hypodermis and also early stages of differentiation of retinula. Outline of cuticle and subcuticle shown. 

 X 660. 



Fig. 55 Section from eye shown in Fig. 10. Hypodermal cells differentiated. Amitosis taking 

 place in these and the deeper lying cells. The deeper cells are regenerating retinular cells. X 1350. 



