Linnean Society. 265 
can enable us to ascertain the condition of the young when it first becomes 
attached to the teat, and the natural process by which it is applied to that 
part, the authour described the appearances which he had observed in 
dissecting the mammary organs of a younger animal than any of those 
which he had previously examined. In our notice of Mr. Morgan’s former 
communication upon this subject, we mentioned the anatomical pecu- 
liarities which he had discovered in the immature marsupial animal, 
consisting in an undeveloped state of the two lower teats and in a muscu- 
lar investment of the mammary glands.* From the details of the present 
paper it appears that in the very young animal not one of the four future 
teats are developed, as the two upper as well as the two lower nipples are 
proved to be formed by the eversion and protrusion of follicular canals. 
April 20.—A Paper was read, On Luminous Insects, by Mr. Richard 
Chambers, F.L.S., maintaining, on the testimony of various authorities 
(some selected from books, and some collected from original sources by 
the authour,) that Ignes fatui are luminous insects. This opinion is 
supported by the fact often observed, that they appear to alight on 
various objects, and bound over others. 
~ May 4.—Read, An Examination of M. Virey’s Observations on 
Aéronautic Spiders, published in the Bulletin des Sciences Naturelles, by 
John Blackwall, Esq., F.L.S. 
May 24.—This day, being the Anniversary of the Society, the follow- 
ing Officers and Council were elected for the ensuing year. President: 
Edward, Lord Stanley, M.P. Vice-Presidents: A. B. Lambert, Esq., 
F.R.S.; W. G. Maton, M.D., F.R.S.; E. Forster, Esq., F.R.S.; and 
R. Brown, Esq., F.R.S.—Treasurer : Edward Forster, Esq., F.R.S.— 
* Weare informed by Mr. Morgan, that he has found the compressing mus- 
cle of the mamma, described in the paper to which we allude, not only in the 
Kangaroo, but also in the American Opossums, and in other marsupial animals 
received from Australia; and that his opinion respecting the use of this muscle 
in compressing the mamme against the marsupial bones, as a means of forcing 
nourishment into the mouth of the young, is strengthened by the observations 
he has made, that in proportion to the extent of the mammary organs, will be 
found the length of the marsupial bones which are placed behind them: the 
firm point of resistance against which the glands are pressed by the contraction 
of their muscular coverings being thus proportioned to the size of the mamma 
themselves, 
’ 
