546 The American Naturalist. [June, 
PROCEEDINGS OF SCIENTIFIC SOCIETIES. 
New York Academy of Sciences.—Biological Section.— 
April 9. H. F. Osborn, in “ A division of the Eutherian Mammals: 
into the Mesoplocentalia and Cenoplacentalia ”, noted that the radiation 
of the mesozoic placentals into carnivorous, herbivorous and insectivor- 
ous types, was analogous to that of recent placentals, or to that of 
Australian marsupials; Mesoplacentalia would represent a group 
primitive, as in foot and brain, vel great bide oka inertia; it would 
include Amblypoda and Condy] , the Creodonta,. 
Tillodonta and Insectivora as Unginculates and the Lemuroidea as 
primates. 
O. S. Strong, exhibited “ Nerve-cell Structures as demonstrated by 
Golgimethods”, and presented for publication a memoir on the 
“Origin and Peripheral Distribution of the Cranial nerves of 
Amphibians.” 
P. Gibier, “ A note on Glycosuria produced Experimentally.” 
A. B. Matthews, “ On the Structure and Physiology of the Pancreas. 
Cell” Bashford Dean, Recording Secretary. 
Proceedings of the Natural Science Association of Staten 
Island.—April 14th, 1894 Mr. Chas. W. Leng exhibited living and 
mounted specimens of beetles, new to or rare on the Island, with the 
following memoranda: 
BRYAXIS ABDOMINALIS (AUBE). 
Three years ago I found a number of small beetles clinging to the: 
underside of pieces of bark and wood lying on the banks of a salt mead- 
ow creek near Arlington ; the beetles were first observed by me at the 
point where the railroad embankment ends and the trestle begins, but- 
Mr. Davis had previously found the same or a closely allied species at 
other points on the border of the salt meadow. These beetles proved 
to be Bryaxis abdominalis, one of the Pselaphide, an addition to the 
fauna of Staten Island, and, in view of the numbers in which they were 
found and the rarity of the species of this family as a rule, an addition 
of unusual interest. 
During the early spring of 1893 and again this year I have made 
some careful observations to determine the date of appearance and the 
exact localities frequently by those beetles. They may be found early 
