155 
Pror. D. 8S. Martin remarked that this was a very fine 
specimen of arare insect Dynastes Tityrus, and is our only 
native representative of this genus. It is large, being over 
two inches in length, but is excelled in dimensions by anoth- 
er species of this genus, D. Hercules, which is about six 
inches long. 
Pror. A. M. Epwarps exhibited a Cast of a Tree-stem in 
Sandstone, procured by him at the Sandstone quarries at New- 
ark, New Jersey, where they are reported by the workmen 
to be not common. He also detailed the results of a further 
examination, which he had made of the strata exposed at that 
locality in continuation of what he had already reported upon 
this subject before the Lyceum. During his last visit to 
these quarries he had found the Lignite mentioned before in 
the grey Sandstone accompanied by Malachite. 
Pror. H. Wurtz exhibited a number of specimens of 
Iron Nodules and made some remarks thereon, claiming that 
they have been formed from Pyrites nodules through the in- 
tervention of aerated water. He pointed to the fact that the 
sand found in their interior was siliceous, sometimes colored 
by Iron. He also showed Lignite from the same beds from 
which these nodules were procured. 
The following paper was read by title: to be published, in 
full, in the annals of the Lyceum: 
Descriptions of New Species of Birds, from Mexico, Central 
America and South America, with a note on Rallus longirostus, 
by G. N. LAWRENCE. 
