Earliest J31ood Vessels in Anterior Limb Buck 



293 



there are as many as ten of these vessels and on tlu^ left side, four. 

 They are all remarkably delicate, being smaller, on the whole, than 



OtVe& 



i2it)Doi. 



c)z$.Art. 



30fiDor 

 <Seg. Art- 



FiG. 2b — Chick embryo cf 32 somites (embryo 3 of table) showing establish- 

 ment of primary capillary plexus of limb bud by union of subclavian capil- 

 laries with primary body wall plexus, x 53i^. 



most of the capillaries in the somatopleure. One can see that under 

 ordinary conditions such structures might be difficult to trace, and 



