PLATE 1. 



All figures are from methylene-blue preparations of Branchiostoma caribaeum; 

 the epithelium of the skin is not present. 



Figure 1. Nerves of the right side of the rostrum. X 93. 

 Figure 2. Nerves of the left side of the rostrum. X 93. 

 Figure 3. Nerves of the right side of the rostrum. A few nerve branches in 



the ventral region are not shown. X 93. 

 Figure 4. Nerves of the left side of the rostrum. X 93. 



