PLATE 12. 



SQUALIDAE. 



Fig. 1-4. AcANTHiDiuM AcicuLATUM (Page 217). Fig. 5-8. Centrophorus acus (Page 199). 



1. Lateral view of a specimen 'Ml inches long. 



2. Teeth from the front end and from the side of the jaw. 



3. Head from below. 



4. Scales from the middle of the flank. 



5. Lateral view of a specimen 32^ inches long. 



6. Teeth from the front end of the jaw. 



7. Head from below. 



8. Scales from near the middle of the flank. 



