116 TRANSACTIONS OF THE [ FEB. 23 
A chemical analysis of the nodules from Div. 10’ gives the 
following results : 
Si0, - - - - - - 24.74 
Al, Os - - - - - 11.85 
Fe, O; = = = = = = 11.44 
CaO - - - : - 22 35 
MgO - - - - - - 2.29 
K, O - - - - - =< 30:59 
Na,O_ - - - - - - 1.41 
P, Os - - - - . 14.99 
CO, - : - - - - 3.53 
Tees Yat 110° - . - - 3.43 
j below red heat = : - 3.44 
100.06 
This shows an unusually large percentage of iron and alumina, 
and a low one of phosphoric acid. Much of the silica seems to 
be in the form of quartz or of silicates insoluble in acids. 
Oruer PxospHatre Noputes in THe Sr. Joun Grovur.—The only 
other occurrence of phosphatic nodules in the St. John Group 
is in Div. 2c, at the City of Saint John, where beds containing 
an abundance of Linguloid shells bear also irregularly rounded 
or flattened nodules of small size, which are composed of com- 
minuted Lingulz, and have been considered to be coprolites. 
The occurrence, shape, and composition of these are quite 
different from the Hanford Brook material ; they are black and 
shining, showing the little polished surfaces of the comminuted 
shells. They are not accompanied by glauconite sand. 
Comparison Wit OrHer Puospuate Depostrs,—Phosphate beds 
are well known in many other parts of the world. Those of the 
Cambrian and Lower Silurian of Wales, where one naturally 
looks for the nearest analogy to those of the St. John Group, 
have been described by Mr. Davies*, and their origin is discussed 
by Dr. Hicks} in an article on Phosphates in the Cambrian 
Rocks. They seem to be much more altered than those at 
Hanford Brook, but of much the same general character. They 
contain, however, a large amount of carbonaceous matter, and 
no mention is made of any glauconite accompanying them. 
* Quart. Jour. Gol. Soe., London, Vol. XXXI., p. 357. 
t Op. cit., p. 368. 
