Archive image from page 186 of The development of the chick;. The development of the chick; an introduction to embryology . developmentofchi00lill Year: 1908 ----5= '-Xrââ ⢠V N \' -. / / C O O t 5 L cj o a> ' fi C fc. .aj c o ⢠- 2 o tn ~ ~ 'tj A I I lâi 4J oâ c o 9 .0 c â â + - ' ' tj r O O IâI o a; of the lens sac are at first of practically even thickness (28 s) but by the 35 s stage a great difference has arisen by the elono-a- tion of the cells of the inner wall, which are destined to form lens fibers: the cells of the anterior (outer) wall elongate much

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