232 4 8=©. Billings on the Red Sandstone of Vermont. 
recommend it for this purpose. 
Troy University, August, 1861, 
ART. XXXI.—On the Age of the Red Sandstone formation of Ver- 
mont; by EK. BILLiInes.* 
I nave lately been examining a tract of the Calciferous sand- 
rock which lies on the boundary line between Canada and Ver- 
a : 
color. It is here the typical red sandrock formation of Prof. 
Adams. Hearing that Dr. G. M. Hall and Rey. J. D. Perry of 
Swanton had discovered trilobites near this place I called upon 
them and they kindly conducted me to the locality. It is above 
two miles south of the line and one mile or a little more east 0 
the Highgate Springs. The individual fossils are abundant in the 
red sandstone but I could find only two species, a small Theca 
; B 
little larger and I think quite distinct therefrom. It is a true 
primordial type and if. we are to be guided at all by ee 
Silurian but at the very base of Barrande’s Second Fauna if not 
indeed a little lower. It is therefore not the Medina Sandstone 
Museum of the Geological Commission, Montreal, Canada, July 22, 1861- 
ine letter to one of the Editors of this Journal. 
