40 CETACBA. 



39018. The mucli-wom right tympanic; from the Eed Crag of 



Woodbridge, Suffolk. This and the following specimens 

 are noticed by the writer in the passage cited above. 



Purchased, 1865. 



39017. The more worn left tympanic ; from Woodbridge. 



Purchased, 1865. 



39021. The left periotic ; from the Eed Crag of Woodbridge. This 

 specimen exactly resembles the one figured by Van Bene- 

 den, op. cit. fig. 10. Purchased, 1865. 



27603. The left periotic ; from Woodbridge. Purchased, 1852. 



39019. The right periotic ; from Woodbridge. Purchased, 1865. 



27434. An imperfect right periotic, provisionally referred to this 

 species ; from Woodbridge. Purchased, 1851. 



Balsenoptera emarginata (Owen^). 



Syn. Palcena emarginnta^ Owen ^. 

 Balcena gihhosa, Owen ^. 

 Balcetiodon emarginata, Owen ^. 

 Pcdcsnudun gibbosa, Owen '. 

 Balcenoptera rostratella, Van Beneden ^. 



The tympanic named B. gibbosa by Owen differs only from the 

 type specimen of the present species by a character dependent upon 

 age ; and both specimens agree precisely with the Belgian examples 

 forming the so-called B. rostratella of Van Beneden. The species 

 is allied to B. rostrata (of which the usual length is from 25 to 30 

 feet, and specimens exceeding 33 feet are of very rare occurrence '^), 

 but appears of rather larger size. 



Hab. Europe (England and Belgium). 



39016 a. The much-worn left tympanic ; from the Eed Crag of 

 Woodbridge, Suffolk. This specimen agrees exactly with 

 the typo tympanic figured by Owen in the 'British 

 Fossil Mammals and Birds,' p. 533, fig. 224 (Mus. E. Coll. 



^ Proc. Geol. Soc. vol. iv. p. 283 {l^^^).—Bal<sna. 



^ Loc. cit. 3 Loc. cit. 



* Brit. Foss. Mamm. and Birds, table facing p. xlvi (1846). 



» Ibid. 



6 Bull. Ac. E. Belg. s^r. 2, vol. 1. p. 16 (1880). 



'' See Collett, Proc. Zool. Soc. 1886, p. 264. 



