426 JOHN BEARD, Transient nervous apparatus. 



Fig. 126. Degenerated cell from embryo No. 336 (18 cm but near 

 the point of hatching). The cell is glassy in appearance and there is no 

 chromatin in the nucleus. Maguif. as before. 



Fig. 127. Degenerating cells from embryo No. 282 (over 10 cm). 

 The nuclei are faint and the cells have sharp outlines. Magnif 525. 



Fig. 128. Much degenerated cells from embryo No. 323 (19 cm). 

 Nucleoli absent. One cell vacuolated and fissured. Haematoxylin and 

 eosin stain. Magnif. as before. 



Fig. 129 (a — d). A series of degenerated cells from embryo No. 322 

 (19 cm). Magnif a— c 225, d 525. 



Fig. 130. Very much degenerated cells from embryo No. 336 

 (18 cm, see Fig. 126). Magnif. (Seibert, 4 mm) 225. 



Fig. 131 (a — d). Four similar cells from various sections of a 

 newlj^ hatched skate (No. 375, over 19 mm). Magnif. as before. 



Krommaauiche Buchdruckerei (Hermann Fohle) in Jena. — 1520 



