388 S. I. Smith on the nantes of Brazil. 
of its occurrence in the whole area of Mexico, the other being 
in the State of Puebla. 
© important a discovery as the occurrence of rich silver de- 
posits in mets Jossiliferous, as well as the metamorphic Cretaceous 
ua, cannot adequately be treated within the scope of 
a acta) ache and I x s reserve for a subsequent num- 
ber of this J ournal, descriptions of the interesting silver mining 
localities of Santa Eulalia, Cusihuiricahic and Cieneguilla, of 
which incidental mention has already been made.+ Although 
the metamorphic Cretaceous is, through the labors of the Geo- 
logical Survey of California, well known in numerous localities 
in the Coast Ranges, as a seat of gold — and the Juras- 
sic, east of the High Sierras within the territory of the United 
States, as a seat of silver deposits, the instances above given of 
the unequivocal fossiliferous Cretaceous, as well as a probable 
metamorphic and later zone of the same series, as sources of sil- 
ver.ores, are the first in North America yet reported. The only 
parallel occurrence yet brought to light, so far as I am aware, is 
mm Chili, where according to Mr. Rémond, calcareous fossiliferous 
Cretaceous strata carry silver deposits, evidently much in the 
same way as at Santa Hulalia.t 
New York, Aug. 10, 1869. : F 
Art. XXXVIII.— Contributions to Zoiilogy from the Museum of 
Yale College. No. 1V.—Abstract of a Notice of the Crustacea 
collected by Prof. C. F. Hartt, on the coast of Brazil in 1867; 
by Srpney [ SMI ITH. 
co during Tuly and August, in the second volume of he 
rom a or the West Indies. The following isa list — 
of the species with the localities at which they were ogee : 
by Prof. Hartt. 4 
* Geol. Surv. of California, B aeontology, ii, p. 2 
+ These three localities have produced during the lat 150 years from 200, 000,- ; 
000 to 300,000,000 of perce mainly during the last century. 
cad. of Se. iii, 1866; Phillips’ Mining and Metallurgy of Gold and 
Silver, Pp 318: Pemerie, rien des Mines (4), ix, 2 
