INDEX 



49 



Reconstructions of alimentary tract 

 and its appendages in 

 chick of sixty-eight to 

 seventy-two hours' incu- 

 bation, 31 



Rectum, 40 



Renal arteries, 41 

 veins, 42 



Retina, 22, 35 



Sclerotome, 25 



Sections of chick embryo, trans- 

 verse, thirty-three to 

 thirty-six hours' incuba- 

 tion, 17 

 forty-four to forty-eight 



hours' incubation, 23 

 sixty-eight to seventy-two 

 hours' incubation, 29 

 of ten millimeter pig, trans- 

 verse, 34 

 Segmental plate, 16 

 Segmentation, 8 



cavity, 11 

 Septum spurium, 36 

 Shell membrane, 12 

 Sinus pocularis, 40 

 Somatopleure, 19, 26 

 Somites, 15, 20 

 Spermatozoan, 8 



parts of, 3 

 Spinal accessory nerve, 34, 35 

 cord, 15, 17, 34 

 dorsal zone, 34 

 ventral zone, 34 

 Spindle fibers, 2, 7 

 Spireme, i, 2 

 Splanchnopleure, 19 

 Spleen, 41 

 Starfish egg, 9 

 Stomach, 36 

 Stratum granulosum, 5 



Stroma, 5 

 Subclavian artery, 43 



vein, 35 

 Superior mesenteric artery, 41 



vena cava, 43 



Tail, 3, 15. 33 



Telencephalon, 28 



Telophases, 3 



Testes, 40 



Tetrad, 6 



ThaJamencephalon, 28 



Theca folliculi, 5 



Thorax of pig, dissection of, 42 



Thyroid gland, 31 



Trachea, 3ii 35 



Transverse sections of chick, 



thirty-three to thirty-six 



hours' incubation, 17 

 forty-four to forty-eight 



hours' incubation, 23 

 sixty-eight to seventy-two 



hours' incubation, 29 

 of ten millimeter pig, 34 

 Trigeminal ganglion, 34 



Umbilical artery, 36, 39 



cord, 33, 36, 38 



vein, 36, 39, 40 

 Unequal cleavage, 10 

 Urethra, 40 

 Ureter, 39 

 Uterus, horns of, 37 

 Urinary bladder, 39 



Vagina, 37, 40 

 Vagus ganglion, 34 



nerv'e, 35 

 Vascular area, 16 

 Vas deferens, 40 

 V^etative pole, 10 



