154 | E. T. Newton—Pre- Glacial Mammalia. 
knowledge of any such specimen, and he further says, that the 
lower jaw in the Norwich Museum (Miss Gurney’s Collection) was 
referred by M. Lartet to U. arvernensis. Prof. Busk agrees with 
me that this specimen can only be referred to U. speleus. This 
determination of M. Lartet’s may possibly have caused the name to 
be put in the lists; but as no description of a specimen of Ursus 
arvernensis from the ‘Forest Bed” appears ever to have been 
published, it becomes necessary to expunge the name from our 
lists, until more definite evidence can be obtained. 
Trichechus rosmarus.—A portion of a tusk, from the ‘ Forest 
Bed” near Cromer, closely resembling that of the recent Walrus, 
has caused this name to be inserted in the lists. It appears to 
have been more rapidly tapering and more compressed than is 
the case in Trichechus resmarus, and more closely resembles some of 
the Red Crag forms, called by Prof. Lankester Trichechodon Hualeyt. 
I am unable to agree with Prof. van Beneden, that the Red Crag 
tusks should be referred to the genus Alachtheriwm, and seeing no 
real difference between the ‘“‘ Forest Bed” tusk and those from the 
Red Crag, I refer it to the same species, Trichechodon Hualeyi. 
Certain forms have now to be mentioned which have not hitherto 
been recorded as occurring in the “‘ Forest Bed.” 
There is in the King Collection, at the Museum of Practical 
Geology, the lower end of a fibula which has been regarded as 
ursine, but upon close comparison it is found to agree much more 
closely, both in size and form, with the same bone in the larger 
Felide, than it does with any bear’s fibula with which I have been 
able to compare it. It is quite possible that this bone may have 
belonged to Machairodus; but, be that as it may, it must be taken 
as further evidence of the occurrence of the family of the Felide in 
the “ Forest Bed.” 
Prof. Flower has recently had sent to him from the same horizon, 
near Pakefield, a portion of a humerus, which, on account of its 
having possessed a supra-condylar foramen, and having the upper 
part much compressed laterally, and because of its resemblance 
to the humeri of some of the larger Felide, he believes to 
have belonged to a representative of that family. The specimen is 
of especial interest on account of its having been found in siti, 
and it is hoped that Prof. Flower will shortly publish a descrip- 
tion of it. In the meanwhile it may be regarded as most important 
additional evidence of the occurrence of the Felide in the “ Forest Bed.” 
Quite recently, my colleague, Mr. Clement Reid, has obtained 
from the lacustrine deposit at West Runton a portion of a lower jaw 
of a small carnivore, with the large carnassial tooth in place. This 
specimen agrees so precisely in size and form with the same parts in 
the recent Martes sylvatica, Nilss. (= Mustela Martes, vide Alston, 
Proc. Zool. Soc. 1879, p. 468), that there can be no doubt as to their 
specific identity. This is the specimen which was by mistake called. 
Lutra in Miller’s and Skertchley’s “ Fenland,” p. 505. 
The same gentleman has likewise obtained from the so-called 
** Weybourn Beds” at Runton a small bone which I believed to be the 
