248 



Plate VI. 



Fig. 22. Diagrammatic representation of the principal 

 blood vessels and their distribution. The 

 principal viscera are introduced into the 

 figure in order to shew the distribution of 

 the vessels only. Their space relations to 

 each other are not accurately shewn. The 

 intestine is represented for simplicity's sake 

 as a single coil. The hepatic portal system 

 is not shewn, nor the distribution of the 

 carotid arteries. The arteries are cross 

 hatched, the veins are uniformly shaded. 

 About natural size. 



Plate VII. 



Fig. 23. Reconstruction from serial sections of the 

 cranial nerves of the ocular side. The two 

 scales in this and other figures refer to the 

 numbers of the sections. Sensory canals 

 coloured green. Their sense organs and 

 surface pores are numbered in each canal 

 from before backwards. Eye muscle nerves 

 cross striated. The numerals refer to the 

 numbers of the cranial nerves. Note the 

 relatively large size of the eyes in the young 

 fish. The curve of the medulla shown in 

 this figure does not exist in the adult, and is 

 probably an abnormality. 



Plate VIII. 



Fig. 24. Reconstruction of the left ear and auditory 

 nerve seen from the inner or left side. This 

 figure cannot be compared w'ith fig. 23, the 

 reconstruction being made on a somewhat 



