130 LECTURE V. 



dition of jelly. It is the last remnant of the embryonic 

 subcutaneous tissue which in the development of the eye 

 is inverted with the lens (which was originally epidermis, 

 p. 38). 



The proper substance of the umbilical cord consists of 

 a reticulated tissue, the meshes of which contain mucus 

 (inucin) and a few roundish cells, whilst its trabeculse are 

 composed of a striated fibrous substance. In this lie 

 stellate corpuscles, and when a good preparation has 

 been obtained by treatment with acetic acid, a symme- 

 trical network of cells is brought to view, which splits up 

 the mass into such regular divisions, that by means of 

 the anastomoses which subsist between these cells 

 throughout the whole of the umbilical cord, a uniform 



FIG. 42. 



distribution of the nutritive juices throughout the whole 

 of its substance is in this instance also rendered possible. 



Fig. 42. Transverse section of the mucous tissue of the umbilical cord, exhibiting 

 the network formed by the stellate corpuscles, after the application of acetic acid 

 and glycerine. 300 diameters. 



