496 
ACTINOPTERYGII. 
Fig. 18. 
Outlines of Rostra of Extinct Xiphiidse. 
1. Xiphiorhynchus priscus ; upper aspect and transverse sections (1 
one half nat. size.— London Clay ; Sheppey. 
2. Histiophoms eocanicus ; upper aspect and transverse section (2 a), one tlnr 
nat. size. — Middle Eocene; Bracklesham. 
3. Histiopkorus rotundus ; upper aspect and transverso section, one third nat. 
size. — Tertiary Phosphates ; South Carolina. 
/ 
