THE CELL AND CELL DIVISION 



33 



XVI 



FIG. 15. Various forms of cells, continued. XI-XIII, after Prenant and 

 Bouin, XIV-XVI, from Dahlgren and Kepner. XI. Ganglion cell from human 

 spinal cord; n, nucleus, X 250. XII. Sensory (receptor) cells from human 

 olfactory epithelium, X 175. XIII. Multipolar ganglion cell from optic ganglion 

 of horse. (The processes of the right side are cut off.) a. Axon, X 63. XIV. 

 Part of muscle cell from the fish, Catostomus; c, capillary containing blood cells 

 and platelets, X 500. XV. Ciliated cells from the digestive tract of the Mollusc, 

 Cyclas. XVI. Gland cell from the leech, Piscicola; ch, cytoplasmic channels 

 containing the secretion granules; dt, discharging tubes; n, nucleus; o, nucleolus; 

 s, secreted materials in various stages of elaboration. 



