26 



ZOOLOGY 



tissue, and produced by modification of its cells, is adipose or fatty 

 tissue (Fig. 15), which consists of masses of large cells in which bhe 

 protoplasm has more or less completely become replaced by fat. 



^' 





P: 



— A- 





Fig. 13. — Qelatinnu3 connective tissue of a Jelly-fish ; e, epithelium ; <;, gelatinous matrix 

 ^2, branching cells ; e/, clastic fibres. (From Lang's Comparative Anatomy.) 



the cells being bound together into groups and masses or lohules 

 by means of fibrous connective tissue. 



In the case of cartilage the matrix is of a firm but elastic 



"FlQ. 14. — Eeticular connective tissue. (From Lang.) 



character, sometimes quite homogeneous in appearance {hyaline 

 cartilage, Fig. 16), sometimes permeated by systems of fibres (fibro- 

 cartilage, Fig. 17), which may be of an elastic nature (jjellow elastic 



