THE SKELETON 



413 







/'l?/?^ 



CP/O^ 







COON " «-T**='-iii"'' ^^s-v „ o»- '^ ^ c— . 





/^/>^/'- 











/y7/s/:—& 



w^j.f- 



£-p. 



cepASc/-m-fm^. 







.^"ffi o°e n 







e C« 



Fig. 232. — Frontal section through the base of the tail of a chick 

 embryo of 96 hours. The anterior end of the section (above 

 in the figure) is at a higher plane than the posterior end. 

 caud. Scl., Caudal division of the sclerotome, ceph. Scl., Ce- 

 phalic division of the sclerotome. Derm., Dermatome. Ep., Epi- 

 dermis. Gn., Ganglion, int's. F., Intersomitic fissure. intV. F., 

 Intervertebral fissure. My., Myotome. N'ch., Notochord. N. T., 

 Neural tube, per'ch. Sh., Perichordal sheath, s. A., Segmental 

 artery. 



