378 The American Geologist. June, 1891 
The Chazy formation in the Champlain valley. By Ezra Rrainerd. 
Bulletin, G. S. A., vol. ii, pp. 293-300, with one plate; March 17, 1891. 
This paper gives details of seven sections of the Chazy formation, as it 
is found (1) on Valcour island; (2) in the township of Chazy. X. Y.: 
(3) on Isle La Motte ; (4) in Highgate, Vt., and St. Armand, Que.; (5) 
in Cornwall, Vt.: (6) at Crown Point, N. Y.; and (7) in Orwell, Vt. 
The formation attains its maximum observed thickness on Valcour 
island, situated about six miles south of Plattsburgh, N. Y., which 
seems to have been hitherto unexplored by any geologist. According to 
exact measurements the Valcour section displays an aggregate thick- 
ness of 890 feet of Chazy strata which are classed under three divisions, 
named the Lower, Middle and Upper Chazy. The thickness of the lower 
part is 338 feet ; of the middle, 350 feet ; and of the upper, 202 feet. 
Tlie Mesozoic and Tertiary Insects of New South Wales. R. Etiieridge, 
Jr., and A. Sidney Oliff. This paper is No. 7, PalKontological 
Series, of the Memoirs of the Geological Survey of New South Wales. 
In it we have described and figured five species of fossil insects collected 
from three localities and probably two geological horizons in Australia. 
So far the palaeozoic strata of Australia have furnished no remains of 
insects. For some time a Libelluloid wing from beds of the Cretaceous 
period was the oldest known representative of Australian insect life. 
This wing, together with a few Tertiary fragments, chiefly elytra of 
beetles, represented all that was known of the fossil insect faunas of 
Australia prior to the publication of the present memoir. In this me- 
moir we have a cicada-like species, Cicada ? loivei described from strata, 
probably of Triassic age, occurring near the Talbragar river between 
Mudgee and Gulong. Of the remaining four species here described, a 
beetle referred to the family Buprestidcc, Mesostigmoderma typica, 
comes also from the lower Mesozoic, but from the Ipswich Coal Meas- 
ures at Denmark Hill. Ipswich, Queensland. The other three species 
occur in a species of bog-iron ore that partly occupies an old silted up 
channel cut in Tertiary lavas, and are associated with a flora of Ter- 
tiary age. The channels bearing the insect-bearing iron ore are 
worked for ores of tin which they contain. The locality is known as 
The Vegetable Creel; Tin-mining Field. Two plates give excellent figures 
of the species described. 
Records of the Geological Survey of Ken: South Wales, Vol. II, Port II. 
1890. We have in this publication a number of short papers, embrac- 
ing results of observations made in connection with the Geological Sur- 
vey of New South Wales. The titles include The raised Beaches of the 
Hunter River Delta ; The Shell-heap* accumulated l>y Aborigines of the 
Southern Coastal District; Some beautifully formed Stone Spear-heads 
from Kimberly ; Note* on the Qv/nnedah Coal-field ; On the occurrence of 
Fixh Remains in the Rocks of the Drummond Range. Central Queens- 
la nil ; Description of Stone Weapons and Implements used by Aborigines 
of X. S. Wales; and Description of Tiro Undescribed Unicains from 
the Loner Carboniferous Rocks of N. S. Wales. Among the plates is one 
