315 



/. d. 



s. k. 



sumptive epidermis, b. basal membrane; c, cornea; ch. notochord; cy. epithelial 

 vesicle ; d. covering layer ; ep. epithelial vesicle ; i. contents of vesicle ; k. cartilage ; 

 I. Leydig's cells; m. muscle; ml. pigment;/), pigment; rm. muscle; s. granules in 

 Leydig's cells. (From Kusche, Arch. Entzumech. cxx, 1929, figs. 9, 13, 20, 22.) 



