52 MICROSCOPY. 
In the December Naturauist (page 773), there is another paper 
by Prof. Cope on the ‘ Proboscidians of the American Eocene.” 
The discoveries here claimed rest on an equally unsatisfactory 
basis. The species mentioned had apparently all or nearly all 
been previously described by Dr. Leidy and myself, the type spe- 
cies, Tinoceras anceps Marsh, dating back to June, 1871. Some 
of the characters given by Prof. Cope, e.g., the large upper incisors 
and absence of canines, do not, indeed, apply to the species I have 
described ; but I feel quite sure that Prof. Cope’s haste has unfor- 
tunately led him to mistake canines for incisors. On several 
other points, especially the position of the horns and structure of 
the skull, I believe Prof. Cope to be equally wrong. The animals 
described evidently belong to the order which I have called Dino- 
cerea (Amer. Journ. Sci., Oct. 1872, p. 344). Their true charac- 
ters and affinities, I propose soon to discuss fully elsewhere. — 
O. C. Marsa. 
DISCOVERY OF EXTINCT MAMMALS IN THE VICTORIA Caves, SET- 
TLE, YORKSHIRE. — This famous bone-cave has hitherto produced 
only remains of different ages from the Neolithic period to the 
present. Recent excavations have yielded, however, at the depth 
of about twenty feet, bones of the elephant, rhinoceros, hyena, 
a crushed canine of a much larger carnivore, etc. The elephant’s 
teeth found belong to a young individual, and the number of 
gnawed bones and other indications, that the cave had been a den 
of some larger carnivores, render it probable that the elephant 
was dragged into it by them. — A. W. B. 
MICROSCOPY. 
‘ Microscopy at THE Vensa Exposition.—The Exposition of 
= the Industry of all nations to be held in Vienna this year, will 
afford microscopists a rare opportunity to exhibit to the world the 
results of their ingenuity in contrivance, or of their skill in con- 
‘and President F. A. P. Barnard is chairman of the Advisory Com- — 
mittee on Group XIV, in which are included optical instruments. — 
= Persons desirous of contributing to the exhibition of American 
art on this occasion are requested to communicate immediately — 
ny of the following persons who are the microscopical — 
