315 



b, protrusion of knobs at the periphery and on the surface; in 

 No. 3, the knobs surround the whole body of the corpuscle ; 

 and in No. 4, they are still more numerous. 



Fig. 3, shows coalescence of two or more corpuscles, giving rise to chains 

 and irregularly shaped compound bodies, with the net-work 

 structure visible. 



Fig. 4, represents vacuolized corpuscles. 



In the upper line are seen three corpuscles, each with a differently 

 sized central vacuole; in the middle line, the first figure shows 

 three vacuoles in one corpuscle ; these vacuoles are represented 

 in the second figure to be close together, and in the third 

 figure, the separating walls of apparently five vacuoles have 

 broken down, and one irregularly shaped larger vacuole is 

 seen. The lower line shows the appearance of vacuolized 

 corpuscles seen on edge. 



Fig. 5, shows the structure of five colored blood-corpuscles. 



In the first, there is seen an encircling band of uniform thickness, 

 in which are inserted numerous threads of a net-work ; a num- 

 ber of knots are in the interior, which are seen to be the 

 points of intersection of threads constituting a net-work; in 

 the lower portion of the disk there is a larger knot, which may 

 be called a nucleus. In the fifth corpuscle the complete net- 

 work structure is best seen; in this corpuscle there is seen at 

 the periphery, instead of an encircling band, a number of 

 knots united by threads, having the appearance described as 

 beads, each a little separated from its neighbors on the string. 

 The second corpuscle shows the net-work and encircling band, 

 as the majority of corpuscles show them. In the third, a 

 lighter band is seen, and an irregular flap, produced by either 

 indentation, or protrusion, or both. The fourth exhibits a 

 large flap or knob at its lower portion, with a stretched or 

 extended net-work. 



Fig. 6, shows the final phases of colored blood-corpuscles treated with an 

 appropriate solution of bichromate of potash. 

 In the upper left-hand figure there is a double-contoured ring, with 

 irregularly massed matter and a central vacuole, showing 

 traces of a net-work ; in the lower right-hand figure this is 

 less distinct; and in the two lower left-hand figures are re- 

 presented two so-called "ghosts;" above these there is detritus, 

 i. e., two or three detached portions; and to the right-hand 

 upper figure there is attached a mass, apparently extruded. 



Fig. 7 (see p. 310 ), is a schematic drawing to illustrate the state of rest of 

 the net-work; Fig. 8, the state of contraction; Fig. 9, that 

 of extension; and Fig. 10 (see p. 311), that of layer-formation. 



