81 



ASSISE E. 3 6. 



A bed of purplish gray shale with diffused hematite (giving the rock a Fossils of the 

 purplish gray streak) contains the fossils. There are quite minute spangles O f K 3, viz. a 6 

 of white mica. The fossils of this layer are much corroded and do not a 

 show good surfaces. 



Fossils 



Acrothele aba via ventrals 12, dorsals 21 



A avia (?) " 1 " 1 



Leptobolus atavus " 5 " 7 



Obolus lens, young vtl. 2 . " 4 " 3 

 Trilobite a pleura with a deep furrow 1 



ASSISE E. 3d. 



A considerable body of gray and purplish gray shale, with very minute 

 spangles of gray mica, " Bretonensis Shale." 



Fossils 



Acrothele avia ventrals 5, dorsals 7 



A -puteis " 14 " 10 



Leptobolus atavus " 32 " 33 



Obolus Bretonensis, young vnt. 1 " 6 4 



Bradorona spectator-eequata . . right v. 1 left v. 2 



Of the Acrotheles above named, the first was found on Dugald brook, 

 and the second on Gregwa brook. 



ASSISE E. 3e. 



In this assise the gray shales become flaggy, and split into layers to 

 3 inches thick ; the fissile condition appears to be due to layers covered 

 with fossils alternating with thin beds in which the shells are less abun- 

 dant. The rock has fine spangles of silvery gray mica. 



Fossils 



Acrothyra proa via. . . .ventrals 160, dorsals 160 Fossils of the 



assise E 6c. 



A crassa . 1 



Acrothele avia " 9 " 1 



A abavia " 5 " 



Leptobolus atavus 69 " 63 



L collicia " 18 " 26 



6 C. R. 



