DR. MARTIN BARRY ON FIBRE. 127 



or outer part a, is in mere outline. The lower or inner part appeared to 

 correspond to that marked y in fig. 80, and (3 in fig. 81 ; but was in a 

 more advanced state, the filaments (very minute and delicate in figs. 80 

 and 81) having enlarged, and separated from one another. The spirals 

 in these filaments are represented at certain parts () (par. 36). 

 Fig. 86. Sheep. From the spinal chord -f-. Sketch of filaments. They represent a 



state more advanced than those in fig. 85 (/3) (par. 36). 



Fig. 87 to 90. From the root of the Sow Thistle. Most of the objects represented in 

 these figures, have the appearance of being merely " dotted," when viewed 

 at certain distances (par. 83). 



Fig. 87. The tubes sketched in this figure were filled with interlaced spirals, 

 which are represented only at certain parts. In the tube a, the direc- 

 tion of these spirals is unaltered. In /3, partly separated from the 

 other tubes, the spirals have been distorted ; precisely the change 

 that takes place in muscle (par. 54). y. Extremity of the tube 

 /3, elongated to a point, with a corresponding elongation of the con- 

 tained spirals. Compare with fig. 67, from muscle, and see the de- 

 scription of fig. 67. 



Fig. 88. Corresponding tube, in a state more advanced, and the spirals, there- 

 fore, more numerous and smaller, a. Surface of the tube ("dots"). 

 j3. Interior (par. 83). 



Fig. 89. a. Interlaced spirals, nearly resembling those in fig. 87- /3. Interlaced 

 spirals in a distorted state (par. 54). y. Drawn by reflected light, 

 exhibits interlaced spirals. Compare with figs. 92, 93, and 94, from 

 muscle. 



Fig. 90. The tube in this figure presents the appearance, merely, of transversely 

 elliptical, and bright " pores" or " dots ;" which in reality are spaces 

 between the curves of interlacing spirals, such as those in figs. 87, 

 88, and 89, the curves being concealed in fig. 90. The more su- 

 perficial of the spirals in fig. 90, seem to be coalescing into a mem- 

 branous substance, which conceals the inner ones. a. One of the 

 "septa," formed by the interlacing spirals (par. 83). 



Fig. 91. Sheep. Filament consisting of interlaced spirals, from the cornea. The 

 cornea appeared to be wholly composed of filaments in the densest ag- 

 gregation, and running in every direction. 

 Fig. 92. Turtle. Interlaced spirals, from the heart. 



Fig. 93. Chick in ovo ; incubated fifteen days. a. Sketch of interlaced spirals in 

 muscle. On the right, at the lower part, are portions of a ruptured 

 spiral, adherent to the rest. The object |8 represents a young fasciculus 

 of muscle. Compare it with fig. 89 y, and see par. 83. 

 t See the note, p. 120. 



