288 
however, considers it a true fish of the Ganoid order. It has 
been described as having the body of a toad, and the jaws 
and teeth of a lizard. The skin was covered with long, 
narrow, tile-like horny scales, arranged in parallel rows, and 
altogether it was a very remarkable-looking creature, whose 
position in the animal kingdom entitles it to consideration at 
the present day. 
Pror, A. M. Epwarps reported on the optical examin- 
ation of the Reddish-colored material from the Fuentes de Sangre, 
in Honduras, exhibited at the last meeting by Dr. A. 
Habel. Examination showed that the color was not truly 
red but rather brownish; and that a considerable amount of 
sediment had collected at the bottom of the bottle. When 
this sediment was viewed by means of the microscope, it was 
seen to be, for the most part, made up of brown grains of 
no definite form or texture. 
Mixed with this material were several Crystalline Plates 
four-sided ‘and somewhat lozenge-shaped. These depolarize 
light in some degree. Examination by means of the Spec- 
troscope reveals nothing of interest. Jt has been turned 
over to Dr. Schweitzer for chemical examination. 
Pror. H. Wurtz said that some years since Prof. 8. W. 
Johnson, of New Haven, examined both chemically and 
microscopically this material from this same spring, and 
determined it to be the dung of bats. 
The President, Dr. J. S. NEwBERRY, said that in some 
localities such large accumulations of the dung of bats was 
not uncommon. He had visited a cave in the West in 
which it existed in enormous quantities, whilst the bats 
hung in large numbers from the roof. 
Pror. H. Wurtz exhibited specimens of a Greensand Marl, 
from Shrewsbury River, New Jersey, which possessed some 
characters peculiar and of interest. It was not readily acted 
upon by acids, as he demonstrated. Acetic Acid was with- 
out any action even when boiling, but Nitric Acid acted with 
