MOVEMENTS OF VOLUNTARY MUSCLE. 
499 
Fig;. 60. Primitive fasciculi from the pectoralis major of a foetal Calf about two 
months after conception, showing the corpuscles. 
Fig. 61. Primitive fasciculi from the pectoralis major of a human nine months foetus, 
showing the corpuscles here and there, but obscured by the strong trans- 
verse striae. 
Fig. 62. Mass of primitive fasciculi from the same, treated with tartaric acid, show- 
ing numerous corpuscles, turned in various directions, some presenting 
nucleoli. 
Fig. 63. Detached corpuscles from the same. 
Fig. 64. Detached corpuscles from the scalenus of a child two years old (made 
evident by citric acid). 
Fig. 65. Corpuscles in a mass of fibres from the adult human stomach, treated 
with tartaric acid. 
Fig. 66. Fibres from the adult human stomach, bulged at intervals by their cor- 
puscles. Without acid. 
Fig. 67. Mass of fibres from the first stomach of a Sheep ; the corpuscles made 
evident by tartaric acid. 
Fig. 68. Attachment of tendon to a primitive fasciculus, from the Skate. On bring- 
ing deeper and deeper portions of the specimen into focus, along the line 
of union between the two structures, fresh tendinous wavy filaments and 
striated muscular parts came everywhere into view together. 
Fig. 69. Another specimen from the same, in which the tendon is more spread out. 
Fig. 70. Two examples of the attachment of tendon to primitive fasciculi from the 
leg of the large Meat Fly ( Musca vomitoria ). The centres of the fasci- 
culi are in focus, and present their row of corpuscles. The scolloped 
margin at a is the sarcolemma raised by fluid. Its attachments are seen 
to be to the light striae, or the circumferences of the discs. The terminal 
disc is a perfect one. 
PLATE XIX. 
Fig. 71 • Primitive fasciculus from the Water Beetle ( Dytiscus marginalis ), con- 
tracted in water, showing the sarcolemma raised in bullae, and a partial 
separation of the discs. 
Fig. 72. Smaller primitive fasciculus from the same, in water. The central portion 
only is contracted, and shows approximation of the striae, increased thick- 
ness of the fasciculus, and the sarcolemma elevated in vesicles. 
Fig. 73. Primitive fasciculus from the Tipula, contracted in water, showing the sar- 
colemma raised by the fluid, and the central row of corpuscles. 
Fig. 74. Primitive fasciculus from the larva of the Libellula, contracted in water. 
The sarcolemma is raised into a large bulla. 
3 s 2 
