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 Beneden\ 



Syn. Heterocetus hrevifrons, Van Beneden ^. 

 Plesiocetopsis brevifrons, Brandt ^. 



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

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

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



Hab. Eurojje (Belgium and (?) England). 



M. 3628. The slightly imperfect right tympanic; from the Antwerp 

 Crag. This specimen agrees exactly with one of the type 

 tympanies (J^o. 1371) in the Brussels Museum. 



By exchange tuith the Royal 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 tympanies in the Brussels 

 Museum labelled " Heterocetus sprangi^ Yan Beneden." 



By exchange with the Royal Brussels 

 Museum of Natural History, 1886. 



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

 This specimen agrees exactly with the examples in the 

 Brussels Museum ; there is a similar specimen from the 

 Hed Crag in the Ipswich Museum. Purchased, 1875. 



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

 size than the preceding ; from the Bed 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. B&r. 2, vol. xxxiv. p. 17 (1872). 



2 I/nd. vol. 1. p. 22 (1880). 



3 Moin. Ac. Imp. St. Petcrsbourg, vol. xx. p. 145 (1873). 



