1893. ] NEW YORK ACADEMY OF SCIENCES 217 
pyroxene and scapolite rocks. However, they show some 
marked difference, both in composition and association, from 
the rocks at Gouverneur. The scapolite rock of the latter 
locality resembles more closely that from the Loire described 
by Lacroix.* 
Another Gouverneur rock contains scapolite in much smaller 
quantity, together with titanite, pink pyroxene and abundant 
dark green hornblende. This rock occurs at three localities as 
sharply defined black bands in limestone. The mode of occur- 
rence strongly supports the idea that these bands are dikes 
rather than interbedded layers. Unfortunately, the great 
amount of contortion in the rocks has so obscured their true 
relations as to render difficult a final decision upon this point. 
In containing hornblende, the rock resembles the well known 
Norwegian scapolite rocky, as well as that of Canadaf, and of 
New Jersey.§ It is also similar to the latter in its association 
with crystalline limestone. 
The possibility of the igneous origin of the Gouverneur 
scapolite rocks is thus suggested, not only by their composition 
and, in the case of some of them, their mode of occurrence, but 
also by their resembiance to other rocks whose igneous nature 
is very generally conceded. On the other hand, through the 
pyroxene rocks associated with limestone, they seem to be con- 
nected with metamorphosed sediments. A final decision as to 
their true character must be reserved until their field relations 
have been more thoroughly studied. 
Hamittron Cotiece, Cuinton, N. Y., April, 1893. 
April 26, 1893. 
SprciaL Mrerina. 
Held in the evening, at the American Museum of Natural 
History, for the ceremonies attending the unveiling of the 
monument to John James Audubon in Trinity Cemetery, which 
was accomplished on the afternoon of the same day, by the 
Audubon Monument Committee. 
* Contributions a Etude des Gneiss a Pyroxéne et d sRoches a Wernérite, 
»- 1, et Seq. 
__ + A. Michel-Levey, Sur une roche 4 sphéne, amphibole et wernérite granu- 
litique des mines d’apatite de Bamle (Norwege) Bull. Soc. Min. Fr., I., p. 43. 
+ Adams, F. D., and Lawson, A. C., On Some Canadian Rocks Containing 
Seapolite. Canadian Record of Science, IIT., p. 185- 
§ Nason, F. L., Ann. Rep. State Geologist of New Jersey, 1890, p. 32. 
