Fossilifcrous RocJcs in Nova Scotia, 197 



disappear and the present picturesque appearance of this part of the 

 section be materially affected or destroj^ed. 



The distorted shale at Doctor's Brook contains fossils, but these 

 are by no means abundant or of a superior grade. After a strict 

 search I have found a bed of Lingula of two or three varieties, 

 associated with a group of a small species of Orthis. In another 

 !)Jace, I got the casts of a delicately striated shell resembling a 

 compressed Chonetes^Rn impression of the aster of a small crinoid 

 joint, and at some distance to the south I met with one or two 

 Lingula cuneata f one specimen of which measures from the umbo 

 to the base 9 lines, and a shell of a different kind, resembling in 

 shape CUdophorus concentricus, but having the surface mark- 

 ing reticulated. I will take an early opportunity of transmiting 

 the cast of this and duplicates of the others for determination. 

 These fossils were found in situ, and they lie at right angles to the 

 slaty fracture. 



The masses of trap, the Frenchman's barn and the rugged 

 crags at the mouth of Doctor's Brook, shew that in this region 

 the volcanic action has been very violent and the fossilifcrous strata 

 have been so distorted that there is for a considerable distance 

 southward no appearance of stratification remaining. The lofty 

 banks of shale present this aspect until we reach a point in the 

 brook where a Plutonic rock again appears, there is then an inter- 

 val and the shale then appears to dip at a certain angle and in 

 a uniform direction. This igneous rock appears to indicate the 

 reason why the preceding strata have been so much shattered 

 and distorted, — to shew that they have been subjected to the 

 violent action of igneous forces before, beneath, and behind. 



(Note hy Dr. Daivson.^ 



[The observations recorded in the above paper by Rev. Mr. 

 Honeyman are of much interest. They establish the continua- 

 tion of the Arisaig line of outcrop to the East Kiver, as suggested 

 by me in my paper lately published in this Journal. They make 

 known for the first time the occurrence of fossils at Lochaber 

 Lake, in rocks supposed from their mineral character to be of 

 the age of those of Arisaig and N. Canaan. The fossils found 

 by Mr. Honeyman confirm this view, and probably also indicate 

 the occurrence there of another and perhaps newer group, simi- 

 lar to that of Nictaux. The position of this place accords with 

 the idea of a succession of anticlinal and synclinal folds pro- 



