84 CETACEA. 



Genus TURSIOPS, Gervais \ 



This genus is closely allied to Belphinus, but has larger and less 

 numerous teeth. 



Curigiopgl tuv^io (Bonnaterre^). 



Syn. Delphinus tursio, Bonnaterre ^. 

 Delphinus truncatus, Montagu *. 

 Tursio truncatus, Gray ^. 



The teeth vary in number from ?i to 2. 

 Hah. Atlantic Ocean. 



20274. The centrum and portions of the neural arch and transverse 

 processes of a lumbar vertebra, provisionally referred to 

 this species ; from the Pleistocene of Grays, Essex. This 

 specimen is indistinguishable from the ninth lumbar of the 

 existing form. Purchased, 1846. 



The folloiuing specimen apparently indicates an allied form. 



35042 a. The centrum of a middle caudal vertebra ; from the 

 Coralline Crag of Eamsholt, Suffolk. 



Presented hy S. V. Wood, Esq., 1850. 



GenERICALLT tri^nETERMINED SPECIMENS. 



The following specimens indicate Dolphins agreeing in size with 

 the existing Lagenorhynchus acutus. They have been alluded to by 

 the writer in the ' Quart. Journ. Geol. Soc' vol. xliii. p. 16, where it 

 is suggested that they may be specifically identical with one or both 

 of two Delphinoids from the Antwerp Crag, of which remains are 

 preserved in the Brussels Museum under the names of Del2yhinus 

 luasii and D. delannoyi, Van Beneden (the generic name being 

 employed in the Linnean sense). There are, however, no periotics 

 or tympanies in the Brussels collection. 



30265. Four periotics in a somewhat water-worn condition ; from 

 the Coralline Crag of Beccles Old Abbey, Suffolk. 



Purchased, 1855. 



27434. Several rolled periotics of a similar type ; from the Eed Crag 

 near Woodbridge, Suffolk. Purchased, 1851. 



1 Hist. Nat. Mamm. vol. ii. p. 323 (1855). 



2 Cctologie, p. 21 {178d).— Delphinus. 3 j^^^.^ ^^y. 

 * Mem. Wern. goc. vol. iii. p. 75 (1821). 



5 Cat. Seals and Whales Brit. Mus. p. 258 (18G6). 



