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 closelj' 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 sujDports 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 rockf, as well as that of Canada^, and of 

 New Jersey. § It is also similar to the latter in its association 

 with crystalline limestone. 



The possibilit}^ of the igneous origin of the Gouverneur 

 scapolite rocks is thus suggested, not only b}- their composition 

 and, in the case of some of them, their mode of occurrence, but 

 also by their resemblance 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. 



Hamilton College, Clinton, N. Y. , April, 1893. 



April 2G, 1893. 



Special Mi-^ting. 



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 jNIonument Committee. 



* Contributions a I'Etude des Gneiss a ryroxC-ne ot d f llocbos a Wernorite. 

 ,.. 1, et se(i. 



t A. Miehel-Levey, Sur nnc roclie Ti sph<"'iu'. .impliibnlo ot worm'-rite criuiu- 

 litiuue des mines d'apatite de Bamle (Norwe«(v) Hull. See. Min. Fr., I., p. 4:t. 



+ Adams, F. D.. and Lawson, A. C. On Some Canadian Hocks ContainiuK 

 Scapolite- Canadian Itecord of Science, III., p. 185- 



§ Nason, F. L., Ann. Rep. State Gooloffist of New Jersey, ih'jo. p. xj. 



