130 DR. MARTIN BARRY ON FIBRE. 



spiral, filaments, probably arisen out of part of i fig. 109. See the ex- 

 planation of fig. 109. Several of these filaments are represented in the 

 figure, and parts of others are shown in outline. These filaments were 

 tense. The direction of (3 seemed longitudinal. 



Fig. 111. Chick in ovo; incubated twelve (?) days. From the leg. A very young 

 muscle-tube in which there are seen five filaments. The figure represents 

 the edges of these filaments. Two of them are close together, and so ap- 

 plied as to produce almost transverse striae; three are loosely situated 

 in the tube. Such filaments appear to become enlarged into such as 

 those in figs. 40, 41. 



Fig. 112. Frog. From a nerve of the leg. a, (3. Fasciculi or tubes (the so-called 

 " primitive fibres"). In a, is seen one of the filaments (" white substance," 

 par. 28) which lie loosely together in these tubes. This filament is on 

 its flat surface. Dots indicate the situation of other filaments. In |3 are 

 represented four of these filaments, all on their edges. The direction 

 of three is oblique, y. Filament, the structure of which was remarkably 

 distinct. S. Similar filament, but more minute and on its edge. 7 and $ 

 seen in fasciculi such as those at and ft. 



Fig. 113. Sketch of a fasciculus of flax. a. Spiral, composed of two filaments, the 

 structure of which is seen at the extremity. Compare with a a of the 

 present figure ; with spiral from the leaf-stalk of the Strawberry, fig. "J\ ; 

 with that in flax fig. 101 ; with those in muscle, figs. 69, 70 ; and see 

 par. 80 on the reproduction of spirals by division. a. Spiral running 

 in the opposite direction ; and consisting of four filaments (see the refer- 

 ence above). The filaments surrounded by the spirals a and a a, are 

 seen for the most part on their edges, in the figure. They have the same 

 structure as the filaments of the spirals a and a a. A cavity in the middle 

 of the fasciculus. Acetic acid. 



Fig. 114. Rabbit. Filaments found in the retina. The number seen was very great, 

 a. Is on its edge. (3. The upper part on its edge ; the lower on its flat 

 surface (pars. 6, 14). 



Fig. 115. Rabbit. Filaments from the medullary substance of the cerebrum. . On 

 its edge; (3. on its flat surface (pars. 6, 14). 



Fig. 116. Rabbit. From the cortical substance of the cerebrum. (3, y. Filaments, 

 the former on its flat surface, the latter on its edge (pars. 6, 14). 



Fig. 117. Frog. From the spinal chord, a, a, (3. Filaments; a, a, on their edges; 

 (3. on its flat surface (pars. 6, 14). y. Varicose object, the enlargements 

 often at pretty equal distances. I have seen the pellucid central part 

 (nucleus?) of one of these enlargements to run along the object, and pass 

 into another enlargement, which was thus increased in size. 



Fig. 118. Rabbit. Sketch of an object noticed in the lachrymal gland (see par. 40). 



