Geology and Mineralogy. 411 
for May, 1883, It is illustrated by 7 plates. He states that the 
anthracite beds of the Queen Charlotte Islands are now known to 
be Middle Cretaceous, and equivalent of the upper part of the 
Shasta group of California, and: that the coal beds of the Nanaimo 
and Comos ins, Vancouver Island, are er Cretaceous, 
equivalent to the Chico and Tejon groups of California. The 
Lignitic or Laramie group is admitted to be a transition group 
between the Upper Cretaceous and Eocene. The paper reviews 
ig! previously described species, and describes others that are new. 
A n ER- 
TRAND have recently pate an account of a new mineral from 
; antes, to which M. Damour has given the . 
name of Bertrandite. An analysis by him yielded: 
SiO, BeO Fe.0s3 H,0 
49°26 42°00 1:40 6°90 = 99°56 
for which the formula 2(Be,SiO,)+H,O is proposed; in other 
words it is near phenacite but differs in containing water. Ac- 
cording to Bertrand it crystallizes in the orthorhombic system 
With a prismatic angle of 121° 20’; the erystals are generally 
tabular In habit through the extension of the basal plane or of the 
brachypinacoid, they are sometimes twins. he erystals are 
transparent, colorless or slightly yellowish, luster brilliant, vitre- 
ous, hardness a little less than six, specific gravity 2°586—2°593, 
The mineral occurs in cavities in pegmatite implanted on quartz 
or feldspar with apatite, arsenopyrite, pyrite —Bull. Soc. Min., 
8 
Tin ore ( Cassiterite) in the Blue Ridge in Virginia.—The 
ober last, contains a note by Prof. H. D. 
d 
to Canada. One of these is meneghinite. It occurs in massive | 
form near Marble Lake, township of Barrie, Ontario. Its specific 
gravity was 6 33. An analysis afforded 
8 Sb As Cu Fe Ag 
1681 1937 tr 6145 136 O07  0:08=99'14 
The tennantite occurs massive at the Crown mine, Capelton, 
Quebec, associated with pyrite, chalcopyrite, quartz, etc. Its 
Specific gravity was 4-622. An analysis yielde 
Ag 
: s Cu Fe Zn Pb insol. 
27°99 15-34 «452 4642:09 3°77) «456 = 0°25 | «O21 «=: 0°09 = 98°82 
