Geological Society. 325 



Jan. 13.— A paper was in part read, entitled, " Researches in Phy- 

 sical Geology :" Third Series. By WiUiam Hopkins, Esq., M.A., 

 F.R.S. 



GEOLOGICAL SOCIETY. 

 (Continued from p. 64.) 



June 30, 1841. — The following papers were read : — 



1 . " Abrief note to accompany a series of specimens from Lockport 

 near Niagara, in the State of New York," by WilHam Jory Henwood' 

 Esq., F.R.S., F.G.S. ^ ' 



Mr. Henwood commences by calUng attention to Mr. J Hall's 

 Geological Reports of the fourth division of the State of New York 

 particularly to that for 1840, which contains an important stratiora- 

 phical account, with lists of organic remains, of the beds near Lock- 

 port (p. 452), and in which the deposit called the Lockport lime- 

 stone is placed m the lowest portion of a series of beds considered 

 by Mr. Hall to be the equivalents of the Wenlock limestone. Mr 

 Henwood hkewise especially aUudes to that geologist's description 

 of several beds classed with the Wenlock limestone of the State of 

 New York, but which have no representative in Shropshire and the 

 adjacent counties. 



At Lockport the strata are nearly horizontal, and are well e.\posed 

 m a section of great length, and about 100 feet in altitude, along the 

 banks of the Erie Canal. The uppermost bed Mr. Henwood believes 

 to be the Lockport or Wenlock limestone ; and it is succeeded in 

 descending order by several other thin beds of similar or slio-htly va- 

 rying characters, and they are all traversed by joints, the principal 

 bearing about magnetic N. and S. Organic remains are stated to 

 be abundant in these limestones. 



nie next subjacent formation is the Rochester shale, considered by 

 Mr. Hall to be the equivalent of the Wenlock shale. It extends to 

 the bottom of the section, except at a few points, and consists of beds 

 of green shale abounding in organic remains. 'inclxxLXm^ Asaphus lonqi- 

 caudatus ?, Homalonotus delphinucephalus , Platymtus BoUoni Ortho 



ceras annulatum ?, Conularia ?, Leptana transversalis L 



depressu, Terehratula aspera, Avicula striata?, Curyocrinites ormta* 

 Beds of hmestone occur in the sliale at irregular intervals, but they 

 contain no organic remains. 



At the few points where tlie cutting has penetrated tlie shale a 

 bed of limestone is exposed, and is stated to contain, on the author 

 ity of Mr. Forman, who lias made the fossils of tlie district his par 

 ticular study, Orbiculae and other organic remains ; and the same 

 gentleman informed Mr. Henwood, tliat licneatli tliis limestone there 

 arc strata ot sandstone enclosing fucoides and leaves of plants. 

 At Rochester the Genessee traverses a channel 500 feet wide and 



• The above species have been detonnined by specimens wliich Mv Hen 

 wood presented to the Society. The Jmphus Inngicuudalus is distin-uislied 

 from the fossil described by Mr. Murchison in the absence of the lanrg nrn 

 tuberauce " on the anterior edge of tlic buckler," Silur. Syst j) OSt;" 



