Botany and Zoology. 289 
of the richest copper mines of the world—those of Aroa, to which an 
i is now making a railroad, sixty miles in length, ten of 
which have already been finished. The soil is of extreme fertility, and 
mahogany and other precious woods abound.—Reader, No. 74, May 28, 
1864 
try could be obtained. The author described each of these sections in 
detail, giving lists of the fossils found in the different beds, which proved 
them to be of Upper Silurian age; and he further considered that they 
conglomerate of Lower Carboniferous age, while trap-rocks occur on the 
nd south.— Z. EZ. and D. Phil. Mag., [4], xxviii, 74. 
Ill. BOTANY AND ZOOLOGY. 
1, New Scirpi of the Northern United States—Among the species 
which, by continued research, are one by one added to the Flora of the 
Northern United States, are a few Scirpee, to which we may here call 
attention, 
The most conspicuous addition is that of a tall Scirpus of the trigueter 
section, which was last year discovered by Mr. A. Commons and Mr. 
Wm. M. Canby, on the eastern shore of Maryland, and which has been 
named S$. Canbyi. It is as tall a species as S. Olneyi, but has its radi- 
cal leaf remarkably developed, as also the involucral one, which appar- 
ently continues the stem; and the spikes, which are half an inch long, 
are all on long and slender rays, which com pairs from the nodes 
a 7) rhachis, from the axils of bracts or involucels. The character 
Superans desinente; umbella sessili dichotomo-composita ; umbellulis 
S€pissime biradiatis involucellatis, radiis omnibus elongatis plerisque mo- 
‘ostachyis; spicis oblongis ; squamis laxe imbricatis oblongo-ovatis acuti- 
sculis dorso virid i ibus late scarios 
im paullo superantibus. 
Jour. Sci.—Srconp Sexis, Vou. XXXVIII, No. 113.—Seprt., 1864, 
37 
