110 TRANSACTIONS OF THE [Frs. 23 
The green sandstone which accompanies the nodules is also 
met with at Hanford Brook, in the Basal or Etcheminian series 
of rocks underlying the St. John Group. In Division 1” of 
the latter it is found as an irregular layer 2” to 4” thick, with 
fine gray sandstone on one side, and the layer of nodules, 
followed by a thin seam of fine shale, on the other. Only loose 
blocks were exposed at this point, the bed-rock not being 
accessible, and hence the actual position of the layers could 
not be determined. In Diy. 1b* the green sandstone is found 
in spots and patches scattered through the lower and middle 
part, and at the top makes an irregular bed averaging some 6” 
thick as far as exposed ; but there may be considerably more. 
It is accompanied by hard phosphatic nodules, and with them 
contains what few fossils are found in this zone. 
The nodules of 1b? have been mentioned by G. F. Matthew, 
in connection with others occurring higher up in the series, 
near the city of Saint John, and have been considered to be 
probably coprolites, due to some large soft-bodied animal. 
APPEARANCE IN Turn Section.—When examined in thin section 
under the microscope, the nodules of Zone 2 are seen to be 
composed of an amorphous, flocculent or granular, light brown 
substance, which, judging, from the analysis of the nodule, is 
probably a mixed phosphate of lime and iron. It is full of 
fragments of tests of Protozoa, apparently of more than one 
kind ; some look like Foraminifera, others resemble very much 
the microscopic bodies occurring in supposed sponge-rock from 
Caton’s Island on the St. John River, and which have been 
described* under the name of Monadites. These may be 
gemmules of sponges. Besides these, there are seen in the 
sections three-rayed bodies, which may be spicules of lithistid 
sponges ; and here and there is a section of a much Jarger test 
having the outline of a crustacean, and which may generally be 
referred to Protolenus}, which is almost the only fossil, not 
microscopic in size, found in this seam. 
The tests are for the most part preserved in calcite, but often 
also in chalecedonic quartz, and sometimes in a pale yellow, 
highly refracting mineral, which shows an aggregate polariza- 
tion in low colors. This may be a variety of phosphorite. The 
more perfect tests are, when complete, usually filled with calcite, 
less often with glauconite or the pale yellow mineral just 
mentioned. When partly broken, they are generally filled by 
*G. F. Matthew, ‘On Cambrian Organisms in Acadia,” in Trans. Roy. Soe. 
Canada, Vol. VII., See. IV., p. 147. 
+A genus created by G. F. Matthew, in Bull. Nat. Hist. Soc. N. B., p. 34, to 
include a number of allied forms of Olenoid trilobites of Lower Cambrian age, 
