1870.] 413 [Brigham. 



Mr. Brigham made a few remarks on a deposit of lava 

 on the Columbia River, which had been cut through and 

 exposed by the action of water. Though the strata dif- 

 fer mechanically, he said they were substantially the same. 

 Whether these deposits were derived from Mt. Hood, which 

 is still active, or from some extinct volcano, is not known. 



He also presented to the Society a photograph of one of 

 the Redwoods, (Sequoia gigantea) known as the "Grizzly 

 giant"; and described it as forming part of the Mariposa 

 Grove. Ten inches of its surface had been burned away. A 

 branch eighty feet from the ground was six feet in diameter. 

 He said the skeleton of another giant remained ; but the 

 trees with few exceptions had been injured by fire. 



Mr. Brigham also exhibited a specimen of Morchella from 

 Grafton, Worcester County, Mass. This fungus was found 

 somewhat abundantly in an orchard, growing in lines which 

 apparently marked the radiating roots of the trees. He said 

 it was edible, but whether the true esculenta, or some other 

 species, he could not determine. 



Dr. F. H. Brown exhibited mounted specimens of Ferns 

 and Fern-allies from Madeira and Porto Santo, and pre- 

 sented the following list of species which have been discov- 

 ered in these islands : — 



Order FILICES. (Ferns.) 



Adiantum Capillus veneris. Athyrium filix-foemina. 



" reniforme. Balantium culcita. 



Aspidium angulare. Blechnum spicant. 



" falcinelle. Ceterach officinarum. 



Asplenium acutmn. Cheilantlies fragrans. 



" anceps. Cystopteris fragilis. 



" axillaris. Davallia Canariensis. 



" furcatum. Elaphoglossum squamosum. 



" Hemionitis. Gymnogramma Totta. 



" lanceolatum. " leptophylla. 



" marinum. Hymenophyllum unilaterale. 



" monanthemum. " Tunbridgense. 



