70 Scientific Intelligence. 
besides crinoidal remains, a few specimens of Orthis testudinaria, 
nearly + m. 8.W. of Stockertown, similar crinoidal stems, Cheetetes- 
lycoperdon and Orthis testudinaria ; y; at Churchville, along with 
enton, in part Chazy, and infers doubtingly, on lithological evi-. 
dence, that the limestone on the north flank of the South Mount- 
ain range is Calciferous ; and since the Trenton limestone—in 
many places holding its characteristic spades conformably 
beneath the eM epaR slates and shales, these slates and shales 
must be of Utica and Hudson River age; and he aa “there is. 
not a partede: of evidence that any of these limestones belong to 
Huronian or older periods.” At one locality graphite scales occur,. 
with traces of brachiopod shells. The limestone has in some 
parts intercalated layers of hydromica slate, and others of 
quartzyte. These and various other points connected — the 
limestone fotnatinns: are discussed at length in the re 
Professor Lesley reviews the topography of No orthampton 
County and the associated region to the east, south and southwest ;. 
describes the sink-holes, and the underground drainage connected 
therewith, in the limestone region; and states in brief the geo- 
id valle The questi 
unconformability in Pennsylvania between the Lower Silurian 
and the ee beds—the Oneida Sone oe decided by 
him adversely. Professor Lesley continues wit iscussion of 
to indicate a detarbated ‘afte ton i lur He com- 
mences: by saying that out of ie a ee Saists 9 an “hypothesis 
has been framed and ca toapply toa thousand miles of the con- 
tinent ;” but by whom, he does not state, or in what publication ; : 
the published conclusions, as far as the writer knows, confining 
the supposed upturning to the regions east of the Hudson, with a 
narrow strip west of part of it, and the extension of the uncon- 
formability southwestward being treated simply as a proper sub- 
ject for investigation. His arguments aga me the unconforma- 
region, such as seem necessary to settle a question in stratifica- 
tion. The fact that dacs is a great gap in the series of forma~ 
