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This species is of the same size, but more elegantly formed than 
the Lob. lobatus, the fleshy wattles more extensively developed, the 
crown of the head only black, and not the back and sides of the 
neck, as in that species. 
Mr. Waterhouse exhibited several species of Mammals, collected 
in Borneo by the Society’s Corresponding Member, James Brooke, 
Esq., and recently forwarded to England by that gentleman. 
Among these specimens was a fine example of the Paradoxurus 
Derbianus, Gray, an animal which has also received the names 
Paradoxurus Zebra, Hemigalea Zebra, and Viverra Boiei. 
Two specimens of Gymnura, a specimen of the Prionodon gracilis, 
and two species of Squirrel, also formed part of the collection. 
The Gymauri differ much in colouring from the G. Rafflesii. In- 
stead of having the fur black, and with longer interspersed white 
hairs, the Bornean specimens are entirely of a yellowish white colour, 
with the exception of the long bristly hairs interspersed with the 
ordinary fur, which are some of them black. In other respects the 
Sumatran and Bornean specimens of Gymnura agree so closely that 
Mr. Waterhouse did not regard the difference in colouring as indi- 
dicative of specific distinction. 
The existence of the Prionodon gracilis in Borneo is noticed by 
Miller, who applies to the animal the name Linsang gracilis. Be- 
lieving the skull of this animal had never been described or figured, 
Mr. Waterhouse called attention to the peculiarities in its structure. 
In some of its external characters, especially in the structure of 
its feet, with their truly retractile claws, the Prionodon evinces an 
affinity to the Cats, which would lead the naturalist to seek for some 
corresponding points of resemblance in the skull; this, however, 
presents all the characteristics of the Viverride: it is of the same 
elongated form ; the lower jaw is long and slender, and the rami are 
curved, so that the angular portion and symphysis are raised. Com- 
pared with other Viverride, the Prionodon skull is remarkable for 
the thinness of the bones and the very slight development of the 
muscular ridges. In general form it approximates more nearly to 
Paradocvurus than to Viverra or Genetta. The zygomatic arch, which 
is slender, is thrown more boldly outwards than in the last two 
mentioned genera, and the posterior portion of the cranium does not 
exhibit the sudden contraction immediately behind the posterior 
root of the zygomatic arch which we observe in the Viverras and 
Genets. ‘The post-orbital process of the temporal bone is but little 
prominent, being in the form of an obtuse angle; the skull differing 
in this respect from that of Paradoxurus, as well as in having the 
palate continued considerably beyond the line of the posterior mo- 
lars. The muzzle is much compressed. The temporal ridges are 
rather widely separated and but slightly marked, though, judging 
from the dentition, the animal was adult. The ant-orbital opening 
is larger than in Geneéta and less advanced, and hence the branch of 
the superior maxiliary which forms its upper boundary is narrower, 
as in Paradozurus. In the form of the lower jaw there is a close ap- 
