725 
prints mentioned at the last meeting, and referred again to 
the letter of Mr. Mason, its discoverer. Mr. Lesley stated 
that he understood Mr. Lorenz to wish to propose for it 
the name Anthracopes Masoni, provisionally, until the dis- 
covery of other foot-prints or remains of the animal, should 
give occasion for a better determination of genus or species. 
Mr. Frazer exhibited what is perhaps the first perfectly 
successful electrotype of a piece of a phonograph ribbon, 
made by Mr. Edison. 
Mr. Frazer described ripple-marks’ on a slab of limestone 
from the Siluro-Cambrian region of Lancaster county, and 
Prof. Prim added that such ripple-marks entirely cover the 
exposed surfaces in the Euhlersville Quarry, in Northampton 
County ; these beds being also of Calciferus sandstone age. 
Mr. Frazer then drew attention to the great significance 
and geological importance of his recent discovery of an im- 
mense anticlinal, crossing Lancaster county, and probably 
traversing York county into Maryland. He called it the 
“Martic” anticlinal, and showed how it exposed fundamental 
gneiss and granitoid beds in the new railroad cuttings along 
the left bank of the Susquehanna river ; how it sheds off to 
the north and to the south at least 16,000 feet of primal 
(Cambrian?) slates ; and how its eastern prolongation, would 
cross Lancaster country into Chester county, where the 
uplift seems to be represented by the fundamental gneiss 
series of the Welsh Mountain. 
The minutes of the last meeting of the Board of Officers 
and Council were read. 
Pending nominations Nos. 857 to 863, and new nomina- 
tions Nos. 864 to 869 were read. 
Prof. Cope called up his motion of April 5th, which after 
discussion, was, on motion of Mr. Lesley, indefinitely post- 
poned. 
And the meeting was adjourned. 
