226 PROCEEDINGS OP THE GEOIOGICAL SOCTETT. [Feb. 8, 



{MoUuscan fauna, northern, tropical, and extinct species, 

 53 per cent, recent. Derived Ziphioid Cetaceans, 

 Mastodon, Bhinoceros, Tapirus, Sus, Hipparion, &c., 

 Carcharodon, Otodus, Phosphatic nodules. 



Upper Antwerp J MoUuscan fauna, northern, tropical, extinct, 53 per 

 Crag \ cent, recent. Few bones, deriTcd teeth of Oxyrhina. 



Middle Antwerp J MoUuscan fauna, 41 per cent, recent. Ziphioid Ceta- 

 Crag \ ceans, Carcharodon, Oxyrhina proper. 



Black Crag (Ant- J MoUuscan fauna, 35 per cent, recent. Few Sharks, 

 werp) \ Cetaceans ? 



Miocene (Darm- j Mastodon, Binotherium, Sus, Hipparion, Bhinoceros, 

 stadt) . ■ ■ \ &c. 



Lower Eocene f Phosphatic nodules. Fish-remains: Otodus. Mam- 

 (Sheppey) \ malia: Coryphodon, Hyracotherium. 



II. Tkichecodon HrxLETi, A NEW Mammalian Possil from the Red 

 Crag op Sttppolk. 



Specimens and localities. — Amongst a variety of specimens of 

 Mammalian teeth which I had collected from the Eed Crag, certain 

 pieces of a large tusk were observed, the form and structure of 

 which seemed to indicate the presence of a new form of Mammal of 

 very considerable size. 



Examples of these tusks have been in the collections of Mr. Whin- 

 cop, of Woodbridge, the late Mr. Acton, and others, for some time, 

 and have been supposed to be either the ponderous lower incisors of 

 a species of Binotherimn, or else belonging to the Mastodon angus- 

 tidens, whose molar teeth are so frequently met with in the Eed 

 Crag. There is nothing, however, in their structure to warrant this 

 supposition, although in their size and outline they somewhat re- 

 semble the tusks of Dlnotheriimi. The matter is one which has 

 never as yet been handled by any competent persons, excepting on 

 one occasion, when a fine specimen of one of these tusks, brought 

 to the British Museum by a dealer, was declared not to be BinotJie- 

 rium or Mastodon ; but what it was, was not hinted at. The various 

 specimens of this fossil which have come under my notice are as 

 follows : — 1. Three large specimens, more or less perfect, from 

 the Red Crag of Sutton and Felixstow, in the collection of Mr. 

 Whincop. 2. Four smaller specimens of the terminal points of 

 young tusks, from Felixstow, Bawdsey, and Sutton, also in the 

 collection of Mr. Whincop. 3. Three fine specimens of portions of 

 the tusk, as well as smaller ones, in the collection of Mr. Calvert, 



of a paper by him on some Mammalian fossils from the Eed Crag of Suffolk, 

 read Feb. 20th, 1856. In this paper he expresses his opinion that the " Eed 

 Crag is the debris of former Tertiary strata, and in a great proportion of the 

 Miocene period." 



