314 MR. P. L. SCLATER ON WILD GOATS. [May 18, 
The variation in position of these apertures is of importance, because 
certain genera (e. g. Urocheta, Eudrilus, Rhinodrilus) are charac- 
terized by the different position of the male pores, which are almost 
always (Pericheta, Perionyx, Megascolex, Anteus, and Microcheta) 
upon the 18th segment. In one instance (No. 6) there were two pairs 
of male generative orifices on following segments (14, 15), and on 
segment 16 a pair of orifices which appear to be papillze, since they 
are not furnished with the prostates of the anterior orifices. The 
presence of two pairs of male orifices, each with their own prostate, 
is of importance, since a genus (Acanthodrilus) is mainly distinguished 
on account of this very peculiarity. The normal individuals of 
Perionyx excavatus have no genital papille, which are so charac- 
teristic of many species of Pericheta ; in the variety just mentioned, 
as well as in No. 8, there were a pair of similar papille. 
Nephridia.—In one instance I observed an alternation in the 
position of the nephridial pores, confined, however, to a single pore, 
which was placed considerably nearer to the dorsal median line than 
the pores on the preceding and ensuing segments. 
In conclusion I would again point out that the variations recorded 
in this paper mainly affect the generative system, which is known to 
exhibit such characteristic differences in various genera and species. 
I have not noticed any prominent variations in other organs. 
. 
3. Remarks on the various Species of Wild Goats. By 
P. L. Scuarer, M.A., Ph.D., F.R.S., Secretary to the 
Soeiety. 
[Received May 17, 1886.] 
(Plates XXXI. & XXXII.) 
The male Sinaitie Ibex which we received as a present from 
Mrs. Laing in December 1884" has now become a fine animal, As 
the first of the species that has reached the Society’s Gardens, I 
have thought that a portrait of it would not be inappropriate to the 
Society’s ‘ Proceedings ;’ and I have accordingly had the accom- 
panying sketch (Plate XXXII.) prepared by Mr. Smit, which will 
give a good idea of the original. 
The animal stands about 31 inches high, and is generally of a dark 
rusty brown colour, with black dorsal stripe aud limbs, the latter 
being white on tie inner sides and on the knees. 
I take this opportunity of offering a few remarks on the known 
species of Wild Goats and their distribution. I will mention them 
in geographical order, commencing with the westernmost species, and 
proceeding eastwards, alluding especially to those of which we have 
received living specimens. 
1 See P.Z.S. 1885, p. 2. 
