540 ON HERPESTES FERRUGINEUS AND OvIS POLIT. [Nov. 2, 
« Tentacles two, long, subulate or filiform, bearing the eyes on 
their outer side near the base. 
« Foot much expanded in front and rounded, gradually attenuated 
posteriorly and caudated. 
“« Reptation not by alternate movements of right and left sides, but 
by uniform, undulating, progressive motion of the foot on the sides 
of the vessel in which it was captive. 
«It moved also in an inverted position along the surface of the 
water, as Planorbis and Lymnea do,” as does also Diala picta. 
Notwithstanding this species does not altogether agree with Diala, 
both as regards the shell and animal (thatis, of D. pieta), I deem it 
unadvisable af present to form a distinct subgenus for its reception. 
The differences in the shell consist in the columella being more ar- 
cuate than is usual, and the aperture more than ordinarily acumi- 
nately effuse at the base. 
The animal varies from that of D. picta in having the tentacles 
of equal (and not unequal) length, the foot not auriculate, and in the 
four long tentacular filaments attached to the operculigerous lobe 
being wanting. These peculiarities in the animals certainly appear 
to be sufficient to dissociate them; but until more complete and accu- 
rate investigations have been made on these and other species of this 
genus, I shall refrain from adding to the already superfluous number 
of genera one so ill defined. 
4, Notes on the Figures of Herpestes ferrugineus and Ovis 
poli. By W. T. Buanrorp, F.Z.S. 
[Received July 5, 1875.] 
In the plate of Herpestes ferrugineus published in the ‘ Proceed- 
ings’ for 1874 (plate Ixxxi.) there is a slight error, to which, 
however, it is as well to call attention. The animal is represented on 
a tree. Now all the Indian and African species of Mungoose with 
which I am acquainted (H. griseus, H. malaccensis, H. persicus, and 
others) are thoroughly terrestrial in their habits, and rarely, if ever, 
climb trees. The plate was, of course, drawn after I left England, 
and is, I think, a good representation of the animal. 
There are, however, some very serious errors in the figure of Ovis 
polit * (pl. liii.). 1 have examined a series of skins brought from 
Kashgar ; and I find that none possesses a trace of the mane along the 
neck, represented in both sexes in the plate ; there is some long hair 
behind the horns, and a little between the shoulders, but none on the 
back of the neck. In the plate, too, the male standing up has a long 
bushy tail, and the female lying down has a black line down the 
back. Both these peculiarities, I regret to say, are due to the artist: 
the animal has really a very short tail, so short that in life it can 
* T think this, and not O. poli, is the correct mode of spelling this animal's 
name, 
