Geology and Natural History. 151 
mation, the forms of the crystals of sulphur; Arcanite of Roccal- 
muto; also of Jordanite from Binnenthal, mica of Vesuvius; 
epidote of Vesuvius; microsommite; and chalecomorphite, a new 
species from the lava of Niedermendig of the hexagonal system. 
7. Note on Anomphalus Meeki.—Proft. F. B. Meek has called 
of a new genus, for which I propose the name Dawsonella, in 
honor of the scientist who done most to bring to our knowl- 
ed e land-snails of the Carboniferou em 
though the true Anomphalus probably belongs to the Rotellide, 
as stated by its authors. Ae: G DLE 
New Haven, Ct., Jan. 20th, 1874. 
8. Glacial Period in New Zealand.—Dr. Hector has shown that 
the Glacial period was a marked one in New Zealand geological 
history, and holds that the era was one of “ prolonged though per- 
aps not excessive elevation”; and that “in consequence, espe- 
cially in the South Island, there is a marked absence of marine 
drifts and tills.’— Nature, Jan. 1. : 
_ 9. Fossils of New Zealand.—Catalogues of fossils from the Ter- 
tlary formations, and also an illustrated work on the fossil plants 
% : 
lication. Seven species of Plesiosaurus and related genera have 
para.— Ibid. 
10. Addendum to Article XL VII, vol. vi; by the author, T. B. 
Comsrocx.—Concerning the age of the Bridger and Green River 
groups, referred to the Miocene by Hayden, there is still much 
dis ute, one of the best authorities expressing confidently the 
Opinion that they must be considered Eocene.* In this paper I 
have followed Hayden’s classification provisionally only. For the 
a ai 
he Niagara limestone and the Oriskany sandstone are new for- 
mations to this region. 
O., January 1, 1874. 
Eocene age of these beds. | 
AM. Jour. Sct.—Turep Szrms, Vou. VIL, No. 38.—Fss., 1874. 
10 
