132 
DR. MARTIN BARRY ON FIBRE. 
face of the hair. y. Structure of the filaments, and frequent position with 
reference to the surface. The dots show merely the direction of other of 
the filaments : this direction being spiral. Their distance from one an- 
other is different in different hairs. A similar appearance observed in 
hairs from the under surface of the leaf and from the stem (par. 72). 
Fig. 129. Foetal Sheep. From the crystalline lens. Sketch of tubes containing discs. 
A space in the middle of the tubes (see par. 61). 
Fig. 130. Chick in ovo ; incubated fifteen days. From the crystalline lens. Chiefly in 
outline, a. Composed of filaments, two of which are represented in the 
figure. (3. An object composed of filaments, more of which were present 
on the right hand than on the left ; whence the greater thickness at the 
former part. The arrow indicates the longitudinal direction of these 
filaments. At one end of this object ((3) are pendent portions, not of 
entire filaments, but of spiral threads composing filaments ; these spiral 
threads hanging from the extremities of certain filaments where broken 
off. y. Portion of a fasciculus of filaments containing a nucleus, which 
displaces the contiguous filaments. Many such fasciculi are seen in fig. 
132. In the nucleus are three discs, with an orifice in each. 
Fig. 131. Bream. From the central part of the crystalline lens. a. Two spirals run- 
ning in opposite directions, the one within the other. (3. Two interlaced 
spirals containing filaments, y. Two interlaced spirals. Filament en- 
larging. Certain states of filaments pass into the toothed fibre, discovered 
by Sir David Brewster (see par. 62). 
Fig. 132. Chick in ovo ; incubated fifteen days. From a more central part of the same 
lens, as that from which fig. 130 was taken. Sketch of a flat object, 
folded at (3. It was composed of fasciculi, y, resembling y of fig. 130. 
These fasciculi consisted of filaments, among which were nuclei, displa- 
cing, as at a, the contiguous filaments. 
Figs. 133 to 136. Rabbit. From the cartilage of the ear. 
Fig. 133. This figure represents in outline the situations of several cells. The 
nuclei of these cells are not shown in all of them. In one instance, 
a, the nucleus resembles a ball of twine (see par. 18). (3. Some of 
the filaments of the Intercellular substance. The nucleus frequently 
elliptical in form. 
Fig. 134. Cell, for the most part in outline. The walls composed of interlaced 
filaments, a. Structure of the filaments. The central portion of the 
nucleus had divided into two parts (centres), held together in a 
remarkable manner by interlaced filaments, proceeding from these 
parts. Possibly this division of the nucleus denotes incipient divi- 
sion of the cell into two minuter cells. Each of the two parts 
(centres) of the nucleus had its orifice (“ nucleolus ”) ; the two orifices 
