GEOLOGY. 773 
hill of corn has been broken down, that these small creatures have 
entered the shuck, shelled off the grains, cut out the heart very 
neatly, leaving the corn in a little heap at one side, looking almost 
as if it had not been touched. Where corn has been planted along- 
side of a meadow, their sign is more frequently met with, but never 
to an extent to cause the farmer to feel any uneasiness on the 
subject.— Gipron Lincecum, Texas.—Communicated by the Smith- 
sonian Institution. 
Marixe Crustacea my Laxe Micnicax. Correction. — I 
desire to correct an unfortunate error in an article on the Mammoth 
Cave and its inhabitants (vol. v, p, 752, lines 6, 7), and in the 
separately printed little work ‘ Life in the Mammoth Cave.” I 
there state that a species representing Jdotea entomon, found living 
in the Swedish lakes, had been detected by Dr. Stimpson at the 
= bottom of Lake Michigan. In fact no crustacean of the family 
to which Idotea belongs is known to exist in our Great Lakes, nor 
did Dr. Stimpson mention this genus.— A. S. PACKARD, Jr. 
ALBINO Derr.— A few days since Henry Wilson of Cape Grove, 
a short distance from here, killed an albino deer. The head, neck 
and tail were pure white, while the upper portions of the body and 
back were so nearly white that you could hardly see the spots. 
_ The animal was a fawn of our common Virginia deer, and about 
three months old. Its eyes were also white.— Cuas. H. Nauman, 
Titusiria P. O., Volusia Co., Fla. | 
GEOLOGY. 
Tar Proposcrpraxs or THE AMERICAN Eocene.—During the past 
summer, Prof. Cope, in charge of a division of ‘Dr. F. V. Hayden’s 
Geological Survey of the territories, explored the paleontology of 
‘the Eocene beds of Wyoming Territory. He obtained many 
species of plants, mollusks and insects, and eighty species of 
Vertebrata, of which some fifty are new to science. 
One of the most important of the discoveries made was the 
determination of the type of proboscidians prevalent in that 
period. This is exceedingly peculiar and anomalous in many 
spects. Proboscidian limbs are associated with a dentition of 
same type, when the number and position of the teeth are 
considered. Thus a huge external incisor only occupies the front 
