25 



There are pieces of black siliceous slate and small pebbles of quartz. 

 The Brachiopods of this band are nob much corroded and have their 

 natural contours. 



Fossils 



Acrothyra signata-tarda ventral 1 dorsal Fossils of 



Assise b. 

 Lingulepis longinervis " 9 " 9 



Orthotheca. tube 1 



Bradorona perspicator-magna . , . right v. 2 left v. 



ASSISE c. Fine grained greenish gray sandstone with purple cloud- 

 ings carry the fossils. 



Fossils 



Acrothyra signata-orta ventrals 3, dorsals 2 



Bradorona observator-lsevis . . . right v. 2 left v. 



DIVISIONS. 234 feet. Assisesof 



Division 3. 



Assise a consists of 



4 feet gray shale with abundant scales of hydro-mica. 

 50 " dark gray feldspathic sandstones, having seams of gray 

 grit with felsite debris. 



Assise b consists of 



25 feet fine gray shale. 

 Assise c consists of 



25 feet gray argillaceous sandstone. 

 Assise d consists of 



30 feet dark gray, and some purplish-gray shale. 

 Assise e consists of 



18 feet dark gray shale, the beds alternately harder and softer. 

 Assise f consists of 



40 feet dark gray somewhat siliceous flaggy shales, with pale gray 

 seams at intervals. 



32 " dark gray, rather coarse shales. 



10 " siliceous gray shale. 



The fossils are mostly from the middle of this assise. 

 Notes on the fossils, &c., of Division S. 



ASSISE a. The rock containing the fossils in this assise is a la vender- Fossils of 

 gray to pure gray shale, weathering yellowish in the cracks, and * 



