228 PROCEEDINGS OF THE GEOLOGICAL SOCIETY, [Feb. 20, 



Order Cetacea. 



By far the greatest proportion of the mammalian fossils from the 

 Red Crag belong to this order. In reference to the largest speci- 

 mens, I have little to add to the description of the fossils on which 

 were founded the species of Balc^na (Balcenodonl) affinisy Bal. dc- 

 finita^ Bal. gibbosa^ and Bal. emarginata, in the * Hist, of British 

 Fossil Mammals' (pp. 526-542). Mr. James Carter of Cambridge 

 submitted to me, July 1850, two pairs of Cetotolites from Sutton, 

 differing from the Bal. emarginata in the thicker and squarer form 

 of the greater end of the tympanic bone. The Rev. R. K. Cobbold 

 has showed me a series of silicified fragments of Balcena gibbosa, and 

 cetacean ribs, collected from the Red Crag in the parish of Sutton, 

 where it is separated from Felixstow by the River Deben. 



The front part of the atlas of a cetaceous animal, which must have 

 been from 30 to 40 feet in length, was obtained by the Rev. Prof. 

 Henslow, in 1855, from the Red Crag at Woodbridge, Suffolk. 



Waterworn teeth, corresponding in size and form to the singular 

 teeth from the marine miocene deposits of the " Departement de la 

 Drome," figured by Gervais, in pi. 20 of his * Paleontologie 

 Fran9aise,' under the name of Hoplocetus crassidenSy have been 

 discovered in the Red Crag of Suffolk, and transmitted for my 

 inspection. 



Teeth corresponding in character with those of the Grampus (Pho- 

 acEna Orca) have also reached me from the Red Crag. One speci- 

 men, from a crag-pit at Bawdsey, with a less expanded fang than 

 ordinary, is figured at fig. 23. 



Petro-tympanic bones of a species of Delphinidce, about the size of 

 the Grampus, and some of a smaller species, have been obtained from 

 the Red Crag. 



Portions of a long, slender, gradually attenuated, edentulous, upper 

 jaw have been transmitted to me, by Mr. Edwards of Bunhill Row, 

 from the Red Crag near Woodbridge, Suffolk : the specimen, fig. 24, 

 from the Red-crag at Felixstow, was submitted to me by Mr. G. 

 Ransome. They belong to that family of Delphinidce of which the 

 genus Ziphius is the type, and very closely resemble the species 

 from the crag of Antwerp described by Cuvier * under the name of 

 Ziphius longirostris, now forming the genus Dioplodon of Gervais. 

 The original fossil from Antwerp appears to have been in a similar 

 mineralized condition to those from our own Red Crag. Cuvier 

 describes it as being "petrified and very heavy." MM. Gervais and 

 Van Beneden distinguish the Antwerp Crag fossil in question from 

 the true Ziphius longirostris, Cuvier, under the name of Dioplodon 

 Becanii. They believe it to have come from a 'molasse' formation f. 

 There is not enough of the upper jaw preserved in the Suffolk Crag 

 fossils to enable me with certainty to pronounce on their specific 

 identity with, but I have no doubt of their belonging to the same 

 genus as, the Antwerp fossil. They are equally edentulous in respect 

 of the upper jaw. 



* Ossemens Fossiles, torn. v. (1823), p. 356, pi. 27. figs. 9 and 10. 

 t " EUe semble provenir (Fun terrain de molasse," Pal. Fran?, p. 155. 



