192 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
The analysis given in column 1 was from the glauconite sand at 
Karya-Oro near Ontika, Esthonia, and 2 from the glauconite lime- 
stone at the same place; 3 was from the glauconite limestone, and 4 
from the glauconite sand, at Baltishport. 
For comparison, one may quote the following, the first two from 
Clarke’s Data of geochemistry, p. 494, and the other three from an 
abstract of a paper by Glinka. (Zeitschr. kryst. u. min., 1898, 30, 
p- 390). 
1 2 3 4 5 
SiO, 5156 53.61 48 .95 49.53 52.96 
Al.O3 6.62 9.56 1.66 vst Abi S4 12.76 
Fe:O3 1565 21.46 23 .43 20.06 13.56 
FeO 8.33 1.58 4552 5.95 2.34 
MgO .95 2 87 2.97 2.92 4.11 
CaO .62 1.39 mit | .56 A ga 
Na,O 1.84 .42 .98 a6 AT 
H:O 10.32 5.96 4.93 4.91 4.91 
K,O 4.15 3.49 9.54 9.31 8.69 
MnGooumantr, '% trace b the ae 
99.55 100.34 100.35 99 .54 99.80 
The glauconite in column 1 is from a greensand marl, Hanover 
Co., Virginia; 2 is the mean of four analyses of deep-sea deposits 
from the Challenger Report; 3 is a glauconite from the Cretaceous 
sandstone at Padi, Government of Saratow, Russia; 4 is from an 
Eocene sandstone in the Urals; 5 from the Glauconite limestone at 
Udriass, Esthonia. 
It will be noted that the Russian Ordovician glauconite contains 
_less iron, more alumina, much more magnesia, and more potash than 
the other glauconites listed. 
Kunda formation. By, (Vaginatenkalk) of Schmidt; By, and 
By of Lamansky. 
This well-known formation may be seen throughout the whole 
extent of the Ordovician from the Sjass to the Island Rogo, off Baltish- 
port, but is best exposed in Esthonia. I have selected Kunda as the 
type-section because it is there well exposed and richly fossiliferous. 
A ‘drain recently dug by the Cement Company at the extensive 
quarries about three miles south of Port Kunda on their private rail- 
road exhibits a complete section of the formation, which is here fifteen 
feet thick. A large quarry, opened during the summer of 1914 will, 
