REGENERATION IN COMPOUND EYES OF 

 CRUSTACEA 



BY 



MARY ISABELLE STEELE, M.A. 



With Sixteen Plates and Two Figures in the Text 



I Introduction 1 64 



II Methods and material ] 6 r 



III The normal adult eye 168 



rV The preliminary regenerative processes iy2 



A Healing of the wound and formation of new cuticle lyi 



B Removal of the injured tissue i yo 



C Method of cell division 183 



V Regeneration occurring after destruction of ufiper part of eye 185 



A Regeneration of functional eye 185 



1 Regenerating eye from surface view 186 



2 Details of the development of regenerating ommatidia 190 



a regeneration of retinulae i (jo 



h Regeneration of crystalline cones 102 



c Regeneration of rhabdoms 1^4 



3 Comparison of ommatidia in regeneratioi: and ontogeny 195 



4 Differences in the regeneration of eyes among Palaemonetes Crangon and 



hermit crabs 199 



5 Comparison of normal and regenerating eye 202 



B Cases of aberrant regeneration of ommatidia 203 



C Eye stumps that show an abnormal development or no regeneration 210 



1 Abnormal development of pigment 210 



2 Eye stumps that show no regeneration 217 



VI Regeneration after removal of the greater part or all of the optic ganglion 219 



A Hermit crabs 219 



1 Regeneration of heteromorphic appendages 219 



2 Cases that show no special regeneration 221 



B Crangon 223 



1 Regeneration of heteromorphic appendages 223 



2 Cases that show no special regeneration ^223 



C Palaemonetes 225 



D Histology of the heteromorphic appendages 227 



E General consideration of the regeneration following removal of entire eye 230 



VII Regeneration after splitting the eye longitudinally 237 



VIII Summary 238 



Bibliography 241 



Explanation of plates 243 



The Journal of Experimental Zoology, vol. v, no. 2. 



