3IC ALUS. [Vol. XVIU. 



EXPLANATION PLATE IIL 



Fig. I. Dorsal view of. the head of Scomber, showing the lateral sensory 

 canals. X ii^. 



Fig. 2. Ventral view of the same, showing the lateral sensory canals. 

 X ii4. 



Fig. 3. Lateral view of the same, showing the lateral sensory canals. 



xiy2. 



Fig. 4. Lateral view of the skeleton of the head. X ij^. 



