CELLULAR DIFFERENTIATION 6$ 



(d) Muscle. — Prom wall of stomach, from heart, from skele- 

 tal muscles. 



(e) Nerve Fibres. — Small portion of nerve of frog or cat. 



2. Permanent mounts of sections of cartilage, bone, and 

 tooth showing dentine and enamel are essential. Properly 

 stained preparations of glandular tissue, of nerve cells and their 

 branches, and of reproductive epithelium (see appendix), will 

 greatly assist the pupils in securing an accurate idea of these 

 tissues and their work. 



