46 CETACEA. 



28269. The imperfect centrum of an early caudal (?) vertebra ; from 

 Woodbridge. Purchased, 1852. 



44114. Part of the right temporal ; from Woodbridge. 



Purchased, 1873. 



B. Heterocetine Group. 

 The mandibular condyle has a distinct talon. 



Cetotherium brevifrons, Van Beiieden l . 

 Syn. Heterocetus brevifrons, Van Beneden 2 . 

 Plesiocctopsis brevifrons, Brandt 3 . 



The length of this species probably did not exceed twenty feet ; 

 the frontal is short, and the cranium elevated. The typo specimens 

 are preserved in the Brussels Museum, but have not been figured. 



Hub. Europe (Belgium and (?) England). 



M. 3528. The slightly imperfect right tympanic ; from the Antwerp 

 Crag. This specimen agrees exactly with one of the type 

 tympanics (No. 1371) in the Brussels Museum. 



By exchange with the lioyal Brussels 

 Museum of Natural History, 1886. 



M. 3523. A worn and imperfect left tympanic, not improbably be- 

 longing to this species ; from the Antwerp Crag. This 

 specimen resembles some tvmpanics in the Brussels 

 Museum labelled " Heterocetus sprangi, Van Beneden." 



By exchange with the Royal Brussels 

 Museum of Natural History, 1886. 



45992. The centrum of the axis vertebra ; from Woodbridgc, Suffolk. 

 This specimen agrees exactly with the examples in the 

 Brussels Museum ; there is a similar specimen from the 

 lied dag in the Ipswich Museum. Purchased, 1875. 



28265-6. The imperfect atlas and axis vertebra, of rather smaller 

 size than the preceding ; from the Ked Crag of Wood- 

 bridge. These specimens probably belong to a small indi- 

 vidual of the present or following species. 



Purchased, 1852. 



1 Bull. Ac. E. Belg. s<5r. 2, vol. xxxiv. p. 17 (1872). 



a Ibid. vol. 1. p. 22 (1880). 



3 Mem. Ac. Imp. St. Petersbourg, vol. xx. p. 145 (1873). 



