DR. MARTIN BARRY ON FIBRE. 131 



. Interlacement of filaments. /3. Structure of these filaments, y. Spirals. 

 &. Their structure, i. Outline of trunk ; into which passed. 

 Fig. 1 19. Advanced state of such an object as i, fig. 109. 



PLATE X. 



Fig. 120. Tadpole, about 5^'". Corpuscles, having the same appearance as young 

 blood-corpuscles, connected like the links of a chain (par. 23). 



Fig. 121. Tadpole, about 6"'. Sketch of muscle-tubes, as seen lying together, several 

 of them exactly parallel, and the whole apparently discharged from a 

 parent structure (par. 42). No more than the most superficial portion 

 of their contents is shown ; and this only at certain parts. Some of these 

 tubes (a) present at least two spirals ; in another (|3) are interlaced spi- 

 rals ; and in a third (y), there are rings for the formation of interlacing 

 spirals (par. 42). Very weak acetic acid. 



Fig. 122. Tadpole, 55'". Similar tubes, a. The direction of the spirals is exceedingly 

 oblique. (3. Interlaced spirals. S. The number of spirals appears to be 

 three. 



Fig. 123. Tadpole, 5^'". From the tail. Muscle-fasciculus in which the objects y are 

 surrounded by spirals, (3, in such a manner, that each y is shared by two 

 of |8. a. Larger spiral, common to the foregoing (par. 54). 



Fig. 124. Tadpole. Muscle-tube representing different states of the more central 

 (a, (3), as well as the conditions of the more superficial (y, S) parts, 

 a. Discs not in lines. 0. Larger discs, near the centre, and in something 

 like lines, y. Discs overlapping one another, and in some parts appearing 

 as if linked together. These more superficial than the discs |3, and nearly 

 on a level with the interlaced spirals S ; which correspond to y of fig. 48. 



Fig. 125. Turtle. From the heart. Sketch of interlacing spirals. Each spiral is a 

 flat and compound filament ; the edge of which filament is directed to- 

 wards the observer. Every spiral thread appears to contain nuclei ; and 

 may therefore become a compound filament (par. 55). 



Fig. 126. Dandelion (Leontodon Taraxacum, LINN.). Sketch of a portion of the pap- 

 pus. Longitudinal filaments (j3) in the interior are represented by dots. 

 These filaments are collected into fasciculi by spiral filaments (a) ; the 

 longitudinal filaments being represented by rows of dots, their structure 

 is shown at y. 



Fig. 12/. Groundsel (Senecio vulgaris, LINN.). From the root, a, |3. Sketch of fila- 

 ments. The structure seen in certain of them, y Represents the struc- 

 ture of the filaments (3, and their larger size. 



Fig. 128. Nettle (Urtica dioica, LINN.). The figure represents, between a and /3, 

 the breadth of a hair from the leaf-stalk ; and filaments on the inner sur- 



s 2 



