CILIARY MOTIONS. 



97 



If we take a small piece of the margin of the mantle, or a 

 I particularly recommend the muscular elements of the dorsal vessel or 



heart of Scolopendra for 

 the study of the natural 

 resolution of the muscu- 

 lar fasciculi into fibres, 

 and of their termination 

 iii elastic tissue. (Vide 

 Fig. 66.) 



Fig.65. Muscular fibre 

 from the esophagus, about 

 three inches below the 

 pharynx, to show the 

 union of muscular fibres 

 of the animal (a, a) and 

 of the organic (b, 6) life, 

 after Skey. B, Plan figure 

 of the spiral fibre, which, 

 according to some, sur- 

 rounds the primary mus- 

 cular fasciculi, and gives 

 the appearance of cross- 

 streaking. After Mandl, 

 Anat. Microscop. 



Fig. 65. 



Fig. 66. 



Fig. 66. A piece of a wing-shaped muscle from the Scolopendra Afra, 

 inserted at * * * into the dorsal vessel of the insect. The transition of 

 the striated muscular fasciculi into a net of elastic tissue is very "beauti- 

 fully displayed. H 



