Proceedings. XXV. 
referred as having been cleaned by ants, which was exhibited 
by Mr. Maitland Gardner. 
Mr. A. R. WALLACE being appealed to, explained that this 
was the skull of a species of Pig, the Babirusa, or Pig Deer 
(Barbirusa alfurus), an animal with which he was well 
acquainted. It is found only in the Island of Celebes, the 
Sula islands, and the island of Bouru, all in the Malay 
Archipelago; but as regards Bouru. it is probably not 
indigenous, but has been introduced by the natives. Mr. 
Wallace called attention to and described the long curved tusks 
in the upper and lower jaws. These were probably once 
useful to the animal, but changed conditions of life have 
rendered them unnecessary, and, no longer being worn down 
as fast as they grew, they now develope into a monstrous 
form, just as the incisors of rodents do if the opposite teeth do 
not wear them away. The history and structure of the creature 
all seem to indicate that it is a survival of a very ancient form.* 
The PRESIDENT read some notes on a sterile Grey Hen, the 
Cirl Bunting, the Stock Dove, and a foot of a cock Pheasant 
with an additional toe. (See p. 34). 
The following objects were also exhibited :—By the Presi- 
dent, nest and eggs of the Common Yellow Bunting; Mr. J. 
Berney, volvox; Mr. P. Crowley, specimen of yeast; Mr. E. 
Gill, White Ant; Mr. E. Lovett, Black Ants (Glyciphagus 
plumiger) from Gibraltar; Mr. H. Long, fermentation of malt 
liquor, and shewing fermentation of surface yeast; Mr. 
H. R. Owen, Coralline; Mr. E. B. Sturge, Asterina gibbosa ; 
Mr. W. L. Sarjeant, Peristome of moss and peculiar variety of 
Lime Hawk Moth; Mr. A. Warner, section of leaf and midrib 
of Strelitza augusta, stained in two colours; Mr. W. H. Row- 
land, Globe Fish (Diodon ?). 
At the conclusion of the meeting, Mr. G. F. Linney 
described the Albo-carbon light (patented by the Albo-Carbon 
Light Company), with which the room in which the meeting 
was held was lighted. 
* The skull of the Babirusa is well figured in Mr. A. R. Wallace’s work, 
| ** The Malay Archipelago,” vol. 1, p. 434. 
