Botany and Zoology. 411 
crusts of confusedly aggregated crystals, acts ang cavi- 
ties in decomposing ores of lead and some s fluor spar. The 
color of the larger pane is gone a wn; the aatier ones 
are lighter and are of various shades of orange, yellow, and yel- 
rax-like uster. As i i 
als I 
son-red crystals of vanadinite from the Hamburg mine and fine 
wulfenites, sometimes in octahedral crystals, from the,Red Cloud 
mine, the “Oakland Boys’ claim,” and other points in the Silver 
District, Arizona. 
Ill. Borany AND ZOOLOGY. 
. Recent papers on the Marine Invertebrata of the oo 
face of North America; by A. EK. Verru1.—During t 
few years a much more active interest has been res Jig in the 
marine invertebrata of our coast than ever before, and accord- 
ingly there has been a rapid increase in the number of pa ers 
published « on this subject. This has been due principally to the 
extensive explorations of the sea-bottom and its life, made by the 
. S. Coast oped hd Se nd the U. 8. Fish Commission, e work 
the Gulf of Mexico , Carribbe an Sea, and off Flori da, but in 1880, 
included lines of dredging off the eastern coast of the United 
States, and even to the region off George’s Banks. This work, 
so well begun by Poustalen has, during “ie later years, been car- 
ried on with great perseverance, and wi vith remarkable success by 
Mr. AL \gassiz, whose collections, made by the sigs “ Blake 
are of wonderful extent and interest. Num 8 reports on the 
earlier of these collections have been published, dees past abo: 
but in the following list, I include only the more recen 8. 
explorations y the U. S. Fish Commission, senile the 
1 e nort 
moderate depths, usually within 100 miles of the coast. But all 
this region has been very fully examined, dredgings having been 
made at over 1600 stations, while collections of very great extent 
have been accumulated. As yet very few of the final reports on 
these collections have been published, but numerous preliminary 
papers, by the writer and others, have been printed. Among the 
more recent papers relating to the Fish Commission collections, 
in addition to those printed in this Journal, are the following : 
si ay on the Marine Isopoda of New En gland and Adjacent 
Waters. By Oscar Harorr. <Report the United States 
458, 1 ‘iplatasl 1880.—This is a complete monographic report on 
all the species (46) known up to the date of publication, with de- 
scriptions and ood figures of oa all hes bate ste t is fol- 
