1856.] US 



lowish white extends from the nose to the shoulder ; the latter is less extensive 

 in the male animal, ending at the Tocal sac " Vol. iv. p. 91. And jet, at the end 

 of the chapter on Rana halecina, it is stated as above mentioned, that " there 

 are no openings at the sides of the jaws, at the angle of the mouth, out of which 

 the vocal vesicles pass when distended with air." Except that the sacs are not 

 represented, the figure would correspond sufficiently well with the R. halecina of 

 Kalm. There can be no doubt that the R. esculenta (R. viridis, Roesel, fluvia- 

 tilis, Rondeletius) is different from halecina, although resembling it very much. 

 One of the most important differences consists in the presence in the former, 

 upon the back, of numerous tubercles, each penetrated by one or more pores, 

 giving it a somewhat toad-like appearance ; another is the absence in the escu- 

 lenta of the conglomerated pores upon the neck and other parts of the upper 

 surface of the animal. Of the latter we have at least fifty specimens in the col- 

 lection of the Academy. 



Oq leave granted, Mr. Cassin offered the following Preamble and 

 Resolutions, which were unanimously adopted : 



Whereas, The resignation of William S. Zantzinger, M. D.,as Libra- 

 rian of this Academy, has been presented on account of his removal 

 from this city : 



Resolved, That in accepting the resignation of Dr. Zantzinger as Li- 

 brarian, the members of the Academy of Natural Sciences of Philadel- 

 phia are deeply sensible of the loss the Society has sustained in thus 

 parting with an esteemed associate, and an efl&cient and faithful officer 

 and member. 



Resolved, That the thanks of the Academy be presented to Dr. Zant- 

 zinger, as a testimony of bis valuable services as Recording Secretary, 

 Librarian and Member of the Committee on Proceedings. 



Resolved, That the Committee on Proceedings and the Publication 

 Committee of this Academy, be directed to present in the name of the 

 Academy complete setts of all its publications, or so much thereof as 

 he may require to complete copies that he may have, and to continue to 

 send the same to him as published, gratuitously. 



August llth. 



Vice President Bridges in the Chair. 



Mr. A. H. Smith exhibited a specimen of amygdaloidal trap from 

 Lake Superior, in which the zeolitic matter filling the cavities is en- 

 crusted and partially replaced by green carbonate of copper. 



Dr. Bridges suggested that the zeolitic matter might have been dis- 

 solved by a solution of carbonic acid; and the oxide of copper dissolved 

 by the same agent, and, impregnating the soil, would more or less 

 replace the mineral. 



Dr. Rand announced the death of J. Madison Rush, late Lieutenant 

 U. S. N., and member of this Academy, in the 35tb year of his age. 

 Lieut. Rush was drowned in the Red Lake River, Minnesota Territory, 

 on the 20th of Julv. 



