PLATE 11. 



SQUALIDAE. 



Fig. 1-4. AcANTHiDiuM RosTR.\TUM (Page 218). Fig. 5-8. Acanthidium hystricosum (Page 

 220). 



1. Lateral view of a specimen 34 inches long. 



2. Head from below. 



3. Teeth from the front end of the jaw. 



4. Scales from near the middle of the flank. 



5. Lateral view of a specimen 36? inches long. 



6. Head from below. 



7. Teeth from the front end of the jaw. 



8. Scales from near the middle of the flank. 



