DR. MARTIN BARRY ON FIBRE. 
125 
Fig. 64. Muscle ; a, y, from the Lobster (after boiling) ; &, from the Sheep, a, y. 
Interlaced spirals, which are compound filaments. Their structure is 
seen at (3. Dots represent the situation of longitudinal filaments, sur- 
rounded by the spirals a, y. Appearance inducing the belief that the 
transverse striae cross the fasciculus in a continuous line, until the parts 
are more minutely examined (see the objects a, y, and par. 120). 
Fig. 65. Tadpole, 8'". From the tail. Muscle- fasciculus more advanced than that 
in fig. 94. It presents on one side four interlacing spirals ; each spiral 
a compound object. Their contents not shown. 
Fig. 66. Young Crab. Two portions of a fasciculus of muscle : a. Contracted ; and 
(3, relaxed (see par. 52). The arrow shows the longitudinal direction 
of the fasciculus. 
Fig. 67. Tadpole. Two portions of a fasciculus of muscle, a. The edges of four fila- 
ments (“fibrillse”) are seen, unchanged. (3. Extremity, elongated to a 
point before being broken. In (3, the direction of the spirals is very 
much altered. The upper part of (3 may serve to convey an idea of the 
state of a fasciculus in extreme relaxation (par. 51). (3 Appeared to be 
invested by a highly elastic membrane (par. 54). The extreme point of 
(3 was at the distance of tM" from a. 
PLATE VIII. 
Fig. 68. Tadpole, 5|"'. From the tail. Appearance near the surface of an object 
such as the larger of those in fig. 73, after the addition of acetic acid of 
the strength of distilled vinegar. The discs it presented (fig. 68) seem 
to have been the essential part of spirals such as the larger of those in 
fig. 73 ; the outer part of which had been removed by the acetic acid. 
a. The discs seemed to be composed of minuter discs (par. 55). 
Fig. 69. Tadpole, about 5"'. From the tail. Spirals detached from a fasciculus of 
muscle ; in a quadruple coil (par. 80). 
Fig. 70. Tadpole, about 5'". From the tail. Spirals detached from a fasciculus ot 
muscle ; in a double coil (par. 80). 
Fig. 71- Strawberry ( Fragaria vesca, Linn.). Spiral from the leaf-stalk. This spiral 
is a compound object, containing filaments (“ fibres”) (par. 80). 
Fig. 72. Sheep. From the white substance of the cerebellum. A spiral filament, 
a. Structure of this filament (par. 35). 
Fig. 73. Tadpole, 5|"'. From the tail. Sketch of two sets of spirals ; several being 
parallel in each. The spaces circumscribed by these spirals presented 
discs ; and the spirals exhibited more or less distinct traces of discs in 
their substance (par. 55). 
