
MUSTELIDZ. 183 
St. Gérand-le-Puy, which he refers to the same species ; 
he mentions that he was unable to find the present speci- 
men, which was not labelled at the time of his visit to the 
British Museum. ‘The specimen figured by Filhol appears 
very similar to the present specimen, but the blade of the 
carnassial is slightly longer. 
Croizet Collection. Purchased, 1848. 
Mustela ?, sp. 
Hab. France. 
M. 1366. The greater part of the palatal portion of the cranium, 
showing the canine and all the cheek-teeth; from the 
Upper Eocene of Caylux (Tarn-et-Garonne), France. This 
specimen is rather larger than the cranium of M. angus- 
tufrons, from which it is also distinguished by a great 
difference in the form of m. 1. Purchased, 1884. 
M. 1375. The right ramus of the mandible, showing pm.3 and 
the alveoli of all the other teeth ; from the Upper Eocene 
of Caylux. It is not improbable that this specimen may 
belong to the same species as the last. Purchased, 1884. 
Mustela, sp. 
18232-4. The third lower premolar and the carnassial of a small 
specise ; from the Pleistocene of Suffolk. The carnassial 
is intermediate between that of MW. ermineus and M. 
vulgaris. Green Collection. Purchased, 1843. 
Genus PLESICTIS, Pomel’. 
Dentition :—I. 3, C.;, Pm. 7, M. 5. This genus is distinguished 
from Mustela by the circumstance that the temporal ridges of the 
cranium do not unite to form a sagittal crest. The lower carnassial 
is always furnished with a well-developed inner cusp, and the upper 
true molar is distinguished from that of existing species of Mustela 
by its triangular form, but is very similar to that of MW. angustifrons. 
In the above-mentioned general characters the genus indicates 
viverrine tendencies, and the transition to the extinct genus Steno- 
plesictis (page 96) is so gradual that the viverrine and musteline 
families are practically united by the two genera. 
1 Bull. Soc. Géol. France, ser. 2, vol. iv. p. 379 (1846). 
