37 



c. Two cervical vertebrae, probably referable to this species; 

 from the Red Crag. 



HERPETOCETUS SCALDIENSIS. 

 Van Beneden, Bull. Ac. R. Belg., s6r. 2, vol. XXXIV, p. 20 

 (1872). 

 a. The imperfect right tympanic ; from the Eed Crag. 



FAMILY PHYSETERIDiE. 



EUCETUS AMBLYODON. 

 Du Bus, Bull. Ac. R. Belg., s6r. 2, vol. XXIV, p. 572 (1867). 

 From the Red Crag of Suffolk. 



a. A tooth, wanting the outer layer and summit (No. 51). 



b. Base of a tooth, cut and polished longitudinally and trans- 

 versely (No. 46, a). 



c. Base of a tooth, transversely cut and polished (No. 52). 



d. Five transverse sections of teeth. 



e. Longitudinal section of a smaller imperfect tooth, belonging 

 to the present or an allied genus. 



PHYSODON, sp. 



a. Two rolled teeth, probably referable to this genus ; from the 

 Eed Crag of Suffolk (Nos. 59, 60). 



b. A similar tooth, longitudinally cut and polished; from the 

 Red Crag (No. 54). 



HOPLOCETUS, sp. 

 a. Two rolled teeth ; from the Red Crag of Suffolk (Nos. 39, 44). 



MESOPLODON LONGIROSTRIS. 

 Ziphius longirostris, Cuvier^ Oss. Foss., 2nd. ed., vol. V, 

 pt. 1, p. 357 (1823). 



a. The cranial rostrum ; from the Red Crag of Suffolk (No. 48). 



b. The extremity of a rostrum probably belonging to this species ; 

 from the Red Crag (No. 47). 



