206 MR. J, B, SUTTON ON DISEASES OF “Apr. 20, 
of both animals. In course of time these hybrids were crossed again 
with Ovis vignei, and the third generation shows signs of degene- 
ration from the larger sheep and of reversion to the type of 
O. vignei. 
«The skull of the half-bred animals, which the Tartars called Nyan 
Shapoo, the former being the name of the Ovis hodgsoni or Ammon, 
and the latter that of the Ovis vignei, is nearer in size to Ovis 
hodgsoni, which is double that of the other. The horns of these 
hybrids are rounded in front, resembling what has been figured of 
Ovis brookei, but hollowed out behind like those of O. vignetz. The 
horns of the quarter-bred animal are square in front and hollowed 
behind like the true Shapoo-type, but are more massive than the pure- 
bred Shapoo. 
“* Now as regards the colour of the skin, the Nyan or Ovis hodgsoni 
has no black beard or throat-stripe, which O. vignei has. The half- 
bred animal shows no black, but the quarter-bred does in a modified 
but decided degree. The half-bred turns also in summer to the 
colour of O. hodgsoni, having more of a blue-grey or lavender tint 
and less of the fawn colour of O. vignei; with the white throat of 
O. hodgsoni, it also gets the dark patch at the side of the neck. 
The skin of a quarter-bred specimen before me is of a bright fawn 
above, sides and rump white, and a black stripe down the middle of 
the throat.” 
Sir Victor Brooke was of opinion that Ovis brookei, Ward, P. Z.S. 
1874, p. 143, was probably established on a somewhat similar 
hybrid. 
The following papers were read :— 
1. On some Specimens of Disease from Mammals in the 
Society’s.Gardens. By J. Buanp Surron, F.R.CS., 
Erasmus Wilson Lecturer on Pathology, Royal College 
of Surgeons, Lecturer and Assistant Surgeon to the 
Middlesex Hospital. 
[Received March 30, 1886.] 
During the past twelve months several specimens illustrating 
diseases of mammals in the Society’s Gardens have come to hand. 
Some of them present features of such exceptional interest that it is 
desirable they should be placed on record. Of the value of the 
systematic examination of the bodies of wild animals dying in the 
Scciety’s Gardens there can be no doubt whatever—not in the sense 
that it will enable us to deal with diseases occurring in them, but in 
the amount of light likely to accrue to pathological science in 
general if the investigation be carried on with the diligence and care 
its importance demands. The specimens to be described in this 
paper are of value, inasmuch as many of them are somewhat rare in 
