A B 



Fig. 88. TRANSVERSE SECTIONS OF DOGFISH. 

 A, through tail ; B, through abdominal region (partly diagrammatic). 



Fig. 89. TRANSVERSE SECTION OF DOGFISH THROUGH PHARYNX. 



Owing to the obliquity of the gill-slits, three are cut through on each side. On 

 the left the branchial cartilages (black) and on the right the arteries (white) 

 are shown diagrammatical ly. 



172 



