REGENERATION IN LUMBRICULUS. 



307 



von Wagner, F. 



'oo Beitrage zur Kenntnis der Regenerationsprozesse bei Luil-icitli(s variegalus. 



I. Teil. Zool. Jahrb. Anat., 13. 

 von Wagner, F. 



'06 Beitrage zur Kenntnis der Regenerationsprozesse bei Lumbriculus variegalus. 



II. Teil. Zool. Jahrb. Anat., 22. 

 Welch, P. S. 



'13 A Method for the Preparation of Earthworms and Smaller Oligochaetes 



for Study. School Science and Math., 13. 

 Wilson, E. B. 



'89 The Embrj-ology of the Earthworm. Journ. Morph., 3. 

 Wilson, E. B. 



'92 The Cell-lineage of Nereis. Journ. Morph., 6. 

 Wilson, E. B. 



'25 The Cell in Development and Heredity. The Macmillan Company. New 

 York. 



KEY TO PLATES. 



All figures are photomicrographs. With the exception of Fig. n, all were 

 taken with a Zeiss apochr. 2 mm., eyepiece 10; these are magnified 640 X. For 

 Fig. ii, a B. and L. apochr. 4 mm. and eyepiece 6 were used; this is magnified 

 290 X. The following are the symbols used in the figures: 



a., anal opening, 



c., cuticle, 



chl., chloragogue cells, 



d. e., enlarged dorsal ectoderm cells, 



d. n., double nucleoli, 



g- gut, 



gl., gland, 



h., hypodermis, 



m., mitosis, 



m. c., mouth cavity. 



m. e., metamorphosed ectoderm cells, 



mes., mesoblast, 



migr., migrating ectoderm cell, 



n., nucleus containing nucleolus, 



neph., nephridial cell, 



nb., neoblast, 



ni'. , nerve cord, 



5., seta, 



sep., septum. 



L ! B R A R Y) 



