a field-mouse two of them also a part of the 
fibula, and a dozen or more other bones. Break- 
ing asunder the mass further, we find a few tiny 
teeth ; and as we continue the process in the re- 
maining two specimens, we bring to light parts of 
the skull, ribs, and vertebrae. A strange "co- 
coon " indeed. 
A further examination of the remaining speci- 
mens disclosed similar ingredients, until the en- 
tire mass presented a collection somewhat like 
that shown in my illustration. 
I well remember my first encounter with the 
queer specimens, and what mysteries they were, 
though the "cocoon" idea had never suggested 
itself to me, the felted mass having been found in 
