130 
DR. MARTIN BARRY ON FIBRE. 
spiral, filaments, probably arisen out of part of s fig 1 . 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 striee; 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. «, (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. &. Similar filament, but more minute and on its edge, y and $ 
seen in fasciculi such as those at a and (3 . 
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 u a of the 
present figure ; with spiral from the leaf-stalk of the Strawberry, fig. 71 ; 
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 a. Spiral running 
in the opposite direction ; and consisting of four filaments (see the refer- 
ence above). The filaments surrounded by the spirals « and u 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 uu. 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. 11 7- Frog. From the spinal chord, a, u, (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). 
