a oe 
Contributions to the Mycology of North America. 171 
is cut by two large trap dikes, and Town’s hill in Lancaster, is 
intersected by trap dikes in limestone. 
0. Trap dikes, porphyritic and dark brown compact, occur 
at Berlin Falls, and are also found in passing from Berlin to 
Lancaster. 
11. In Littleton are trap dikes cutting mica slate. 
12. Thorn Mountain, in Jackson, consisting of a porphyry, is 
cut through at top by veins of magnetic oxyd of iron descending 
its flanks, and by a dike of basalt. 
These examples of trap are at very various heights above the 
Sea, and are a fair illustration of the amount of erosion of the 
rocks in their several localities. 1 know of no more valid objec- 
tion to the conclusions based on the evidence afforded by the re- 
those derived from the trap in other formations, whether in the 
mountains of northern New York or in the coal formation, or in 
the sandstones of all countries; and future examination in the 
Very instructive geological field of the White Mountains will 
doubtless furnish much more similar evidence. 
Art. XIX.—Contributions to the Mycology of North America ; 
by Rev. M. J. Berxecey, of England, and Rev. M. A. Curtis, 
of South Carolina, 
61. Acaricus Antituarum, Fries.—In fimetis. May-—Nov. 
Society Hill, S. Carolina. 
62. Coprinus reraiversans, F'r.—Ad terram. Dec: Santee 
Canal, S.C. Mr. Ravenel. 
63. Paxittus porosvs, Berk.! in Lea’s Catalogue.—Ohio! Mr. 
S. Car.! In sylvis humidis. Aug.—Oct. 
64. Hycropuorvs mucriacrnosus, Berk. and Curt. ;—pileo valde 
Mucilaginoso letecolori convexo demum plano Striato ; stipite 
tagili sabconcolori fistuloso; lamellis d tibus crassis carnels 
In paludosis. July. Society Hill. . : 
Cap 6-9 lines broad, of a bright pale reddish yellow, darker in 
the centre. Stem 4 inch high, a line or more thick, composed 
of longitudinal fibres, subpellucid, pale yellow or carneous. Gills 
istant, unequal, fleshy. Allied to H. Cantharellus, Fr., from 
Which it is readily distinguished by its very mucilaginous pileus 
and thick gills ; and from H. letus, Fr., by its brittle stem. 
65. H. Luripus, Berk. and Curt. ;—pileo campanulato umbo- 
Nato pallide fusco viscosissimo; margine striato crenato; stipite 
Reena rasaesemees ee ee 
10, p.104—11, p. 109—12. p. 145. 
