70 JOURNAL AND PROCEEDINGS 
qase, if one may judge from considerable experience, and I may 
frankly-acknowledge; I am utterly unable to afford any. satisfac- 
tory explanation, which for many years has been to me a puzzling 
matter. : ' 
While the well-known fields on the brow of the Escarpment, 
near the Corporation Drain, presented an exceedingly unfavor- 
able appearance for collecting, contrary to expectations, they did 
not fail to produce some Bryozoons and other interesting organi¢ 
‘*‘Silurian remains.’’ On consulting Professor Miller’s well- 
known work I found in ‘‘ American Paleozoic Fossils’? merely one 
Lichenalia named ‘‘L. Concentrica,’’ and a variety ‘‘L. Parvula.”’ 
This family (which, as far as I know, only is found in Niagara) 
is represented. in our local chert beds probably by several un- 
described species. The writer has seen Dr. Jas. Hall’s ‘‘L. Con- 
centrica’’ in the limestones. Rarely, however, the section may 
notice an exceedingly fine specimen of this Bryozoon in the 
case presented to the Hamilton Scientific Association by our form- 
er President, Mr. A. E. Walker. From Mr. McVittie’s field, near 
the Drain, about the middle of September, I got a chert-flake con- 
taining the impression of the valve of a shell unlike any yet s2en 
here. Its appearance may be deceptive; this is not uncommon 
when a portion of the shell has disappeared or is concealed in the 
matrix. There are indications of faint concentric marginal lines 
perceptible. 
Some years back, the writer received from Dr. Head, of Chi- 
cago, specimens of the Niagara Sponges he collected in Tennessee. 
A few were placed in the Niagara Fossil Case, for comparison 
‘with our chert specimens. Not many seemingly are found to be 
common to the different localities. This, however, may be owing 
to the imperfect records; yet, I think. several families of ‘‘Ham- 
iJton Sponges’’ are unpresented in the Tennessee ones. Our 
collection here is incomplete, and as this class of fossils attracts 
(like the Niagara Graptolites) considerable attention outside 
Canada, it is absolutely necessary to present to visitors as com- 
plete a series of these organisms, this being looked upon as the 
headquarters for both. Some light additions to these have 
