185 



Dr. C. T. Jackson exhibited specimens of Botryoidal and 

 other Copper ores, from Coale's mine, Frederick Co., Mary- 

 land. He also pointed out a green crust, which he suppos- 

 ed to be a new mineral, adhering to a mass of Chrome ore. 



Dr. J. B. S. Jackson presented some Bulbous roots, 

 which were brought from the Bay of San Francisco, Califor- 

 nia, by Capt. John Girdler, of IMarblehead, who stated that 

 they were in use there as a substitute for soap. They were 

 referred to Mr. Teschemacher. 



Dr. C. T. Jackson nominated Mr. S. L. Bigelow for 

 election as a member of the Society. 



December 2, 1846. 

 Dr. C. T. Jackson, Vice President, in the Chair. 



Dr. Gould continued his descriptions of Succinea. 



SccciNEA Magellanic^. Testa parva, tenuis, subflexilis, luci- 

 da, nitida, intense virens, rotundato-ovata : spira brevis, acuta, 

 anfr. 3, sutura profunda discretis, ultimo amplo, ventricoso : 

 apertura ovata ; margine columellari reflexiusculo, callo tenui 

 superne munito. Long. ^, lat. f , poll. Hab. Terra del Fuego. 



A small, remarkably short and ventricose species, conspicuous 

 also for its deep grass-green color. 



Succinea manuana. Testa parva, ovata, ventricosa, tenuis, 

 sub-opaca, straminea, longitudinaliter striata et transverse sparsim 

 rugosa : spira obtusa, exserta, anfr. 2^-, ventricosis, sutura pro- 

 funda discretis : apertura ovato-rotundata, peristomate ad colu- 

 mellam minime reflexo ; regione umbilicali depressa, sinuosa. 

 Long. ^, lat. J-, poll. Hah. Manua. 



A small, plump species, resembling S. Magellanica, but still 

 more ventricose, and is further distinguished by its pale color 

 and opacify. 



