Plate XVI. 



All the figures were drawn from fresh specimens stained with Herxheimer's scarlet 



red. d refers to a dark fiber; 1, to a light fiber. Figs. 8 and 9 were drawn by Mr. 



Heldt; the others by Mr. Kline. 



Fig. 1. Gastrocnemius of a frog (R. pipiens), killed May 12, 1910. All the fibers 

 are filled with liposomes, x 475. 



Fig. 2. Gastrocnemius of a frog (R. pipiens), killed June 14, 1910. The liposomes 

 are much fainter, and those in the dark fibers are smaller than in the 

 May frog, x 475. 



Fig. 3. Diaphragm of a moderately fat beef steer, killed June 30, 1910. The lipo- 

 somes in the dark fibers are small. No liposomes are to be seen in the 

 light fibers, x 475. 



Fig. 4. Light fiber from gastrocnemius, of frog (R. pipiens). The frog was fed 

 two days on olive oil. Only a few faint liposomes were visible in the 

 pale fibers before the feeding, x 1800. 



Fig. 5. Fresh Soleus of moderately emaciated cat, killed Jan. 22, 1910. The 

 liposomes are much less brightly stained than those of a normal cat. 

 They are not stained by osmic acid, x 700. 



Fig. 6. Soleus (same as shown in fig. 5) stained after an exposure of four days 

 in 10 per cent formalin. No liposomes are left in the light fibers, and 

 those in the dark fibers are smaller, fewer, and less deeply-stained. After 

 10 days in formalin no liposomes could be stained. X 700. 



Fig. 7. Soleus of a very emaciated cat. A few small faint liposomes are visible 

 in the dark fibers. The soleus of a well-fed cat is somewhat similar to 

 the frog muscle shown in fig. 1. x 700. 



Fig. 8. Dark fiber from gastrocnemius of frog (R. pipiens), July 23. The lipo- 

 somes are small and faint in all the dark fibers, x 1800. 



Fig. 9. Dark fiber from opposite gastrocnemius of same frog shown in fig. 8, 

 after five days feeding with olive oil. All the dark fibers show large 

 bright liposomes, x 1800. 



Fig. 10. Soleus of a sucking pup, Jan. 19, 1910. The animal was moderately fat. 

 The dark and light fibers can already be distinguished. The liposomes 

 are not colored at all by osmic acid, and are largely lost after one day 

 in 10 per cent formalin, x 700. 



