186 EXPLANATION OF THE PLATES. 



a ciliated cell with its nucleus ; 2, outline of the layer of amor- 

 phous material at its base ; 3, cilia ; 4, deeper cells of the same 

 layer ; 5, normal relation of these cells. The ciliated cells con- 

 stitute the free surface of the epithelial membrane. 



PLATE H. 



CELLS, continued; CONNECTING TISSUE. 



FIG. I. Pigment cells from the deep surface of the choroid. 

 They are very regular polygons filled with granules of pigment, 



except in the centre, where the bright spot corresponds with 



.1 .:;.-: 

 the nucleus. 



FIG. II. Branching pigment cells from the outer surface 

 of the choroid; 1, cell; 2, nucleus; 3, anastomosing branch; 

 4, nucleus of oval or fusiform cells, scattered amongst very pale 

 connective fibres. 



FIG. III. Fusiform cells (fibro-plastic). 



FIG. IV. Adipose cells containing acicular crystals of mar- 

 garine in tufts, or solitary. 



FIG. V. Plasmatic cells, or nuclei of the cornea. Their 

 anastomoses are perceptible. 



FIG. VI. Cells from a cancer of the heart, in which endo- 

 genous multiplication of the nuclei, by cleavage, is seen. 



FIG. VII. Another type of cancer cell, showing process 

 of endogenous multiplication of nuclei by cleavage. 1, Nucleus 

 in process of cleavage ; 2, separate nuclei. 



FIG. VIII. Multiplication of cells. 1, Process of endo- 

 genous formation as observed in fo3tal marrow ; 2, multiplica- 

 tion by cleavage in the cartilage cell. 



FIG. IX. Superficial fascia of the forearm. It is com- 

 posed of fasciculi of connective fibres : 1, wavy and crossing in 

 all directions so as to form an interlacement varying in density. 

 Amongst these fasciculi a number of elastic fibres (2) are to be 

 seen. 



