510 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [May 25, 
specimens are in local private collections. The following list may 
give some assistance to any person wishing to come at the material 
relating to any one of these mammalian forms which yet requires 
working out. Coryphodon and Hyracotherium, the teeth of which 
occur in this bed, are excluded from consideration, since they are 
clearly of an earlier age than the other forms, and are in a different 
mineral condition. The late Dr. Falconer mistook a coryphodont 
molar in the British Museum (no. 27432), from the Suffolk bone- 
bed, for the premolar of Mastodon arvernensis. All the mammalian 
remains about to be enumerated are in one and the same mineral 
condition, having a peculiar gloss and weight; in most cases the 
enamel crowns only of the teeth occur, the bony fangs having been 
destroyed. In some carnivorous teeth, and in two Mastodon-teeth, 
I have seen the fangs preserved. No bone which could be identified 
with any of the teeth has ever been found in the bed. ‘The species 
are placed in order of abundance. 
1. Sus, sp. Molars of every size are to be met with. Mr. Whin- 
copp, Mr. Canham, and Mr. Baker have the best specimens. Mr. 
Whincopp has a large imperfect canine. 
2.. Rhinoceros Schleiermachert, Kaup. Fragments of Rhinoceros- 
teeth are abundant in collections ; perfect specimens very rare, espe- 
cially specimens of the posterior upper true molars; Mr. Whincopp 
has two such molars ; Mr. MacLean, of Yarmouth, hasone. Anterior 
upper molars are not so rare; there is one in the British Museum, 
and two or three more or less perfect in the Ipswich Museum, in 
Mr. Whincopp’s, Mr. Baker’s, and. Mr. Canham’s cabinets. Lower 
molars in a perfect state (as far as the crown is concerned) are more 
common. 
It is well ascertained that some of these teeth belong to R. Schlei- 
ermachert, but it has been suggested that there are indications of FR. 
etruscus and of R. megarhinus. It is most desirable that this point 
should be cleared up as far as possible. 
3. Tapirus priscus, Kaup. Specimens of molar-crowns of Tapir, 
more perfect than that on which Prof. Owen based his identification of 
the Suffolk form with Kaup’s 7’. priscus, and from various parts of 
the molar series are in Mr. Whincopp’s and Mr. Baker’s collections. 
The Rev. H. Canham, of Waldringfield, has the finest series,—six 
well-marked specimens. The Tapir-teeth are certainly of the same 
age as the Khinoceros-teeth, if we may infer any thing from identity 
of mineral condition and colouring. 
4. Mastodon (Tetralophodon) arvernensis, Croizet and Jobert. 
Very fine ultimate molars are—one in the Ipswich Museum, pre- 
sented by Mr. Packard, another at York, in Mr. Reed’s collection ; 
Mr. Whincopp has no perfect large specimen, but a beautiful milk- 
molar; Mr. Baker has a series of seven, nearly all perfect teeth ; 
Mr. Canham has two very perfect penultimate upper molars, one 
with the fangs attached; in the British Museum is a perfect crown 
of the lower ultimate molar and some fragments. Altogether there 
cannot have been taken out of the Suffolk bone-bed more than thirty 
perfect or nearly perfect molars of Mastodon arvernensis. The only 
