498 
MR. BOWMAN ON THE MINUTE STRUCTURE AND 
Plate XVIII. 
Fig - . 46. Portion of a primitive fasciculus treated with citric acid. The corpuscles 
are evident, and some are disposed in a central row. The sarcolemma is 
completely burst, but fragments of it remain, and evince their attach- 
ment to the fibrillae by preventing these from freely expanding. From 
the land Lizard ( Lacerta agilis ). 
Fig. 47. Another specimen from the same. Here the fibrillae in protruding from 
the extremity of the sarcolemma have curled back its rim into a circular 
roll, a , a, tightly constricting the mass, and preventing the escape of fluid, 
which at b is collected between the fasciculus and its sheath. The resist- 
ance of the sarcolemma is shown by the expansion of the mass c, which 
has escaped from it. In the protruded part, the corpuscles have resumed 
their oval figure, though somewhat broken. 
Fig. 48. Part of a primitive fasciculus preserved in alcohol, showing the corpuscles 
unaltered in shape. The transparent sheath is seen at the margin. From 
the Frog. 
Fig. 49. Another from the same specimen, showing the adhesion between the cor- 
puscles and fibrillae. 
Fig. 50. Portion of a human primitive fasciculus treated with phosphoric acid, and 
showing the corpuscles. A filament of cellular tissue indents the surface 
of the fasciculus and distorts the striae. 
Fig. 51. Primitive fasciculus from the rectus oculi of the Horse. Tartaric acid. 
Shows the corpuscles. Some are detached at a and possess nucleoli. 
Fig. 52. Primitive fasciculus from the Pig. Tartaric acid. Shows the corpuscles. 
Fig. 53. Primitive fasciculus from the larva of the Libellula, in an early stage of 
development, showing a row of central corpuscles. 
Fig. 54. Adult primitive fasciculus from the ‘Harry Longlegs ’ ( Tlpula ). Citric 
acid. Shows the row of central corpuscles. 
Fig. 55. Primitive fasciculus from the chrysalis of the Tiger Moth, surrounded by 
nucleated cells. 
Fig. 56. Primitive fasciculi, in a very early stage of development, bulged at in- 
tervals by the contained corpuscles, and presenting a remarkable simi- 
larity to adult fibres of the muscle of organic life, as in fig. 66. From the 
leg of a Chicken, tenth day of incubation. 
Fig. 57. Primitive fasciculus, with a corpuscle projecting on its surface. The trans- 
verse striae already developed, and as broad as in adult fasciculi. From 
the pectoralis major of a Kitten at birth. 
Fig. 58. Mass of primitive fasciculi from the same, treated with tartaric acid, 
showing the corpuscles. 
Fig. 59. Loose cell seen floating near the same specimen, containing a nucleus and 
nucleolus. 
