332 



DESCRIPTION OF DEVONIAN TRACKS, ETC. AMI. 



TABLE SHOWING LENGTH OF STRIDE, STEP, OR SPACE BETWEEN IMPRESSIONS 



MEASURED FROM THE APICES OF THE MONTICULES. 



It will thus be seen that the length of steps or space between 

 the impressions are at comparatively equal distances, and in the 

 neighbourhood of seventeen millimetres. The sixth and seventh 

 pairs of tracks are the most normal in the series. 



These tracks are unlike any recorded from North America.,, 

 and the name Ichthyoidichnites Aca<liensis is suggested with a 

 view of indicating the localit}' where the tracks were found, as 

 well as the possible organism that made it. 



Locality and Horizon : A few yards below the earth and 

 stone bridge over the Me Arras Brook along the shore or post- 

 road near the schoolhouse at McArras Brook, P. O., Antigonish 

 Co.. Nova Scotia; in the dark red and drab, evenly-bedded, fine- 

 grained siliceous and jointed mudstones of the Knoydart forma- 

 tion of early Devonian (Eo-Devonian) age, supposed to be the 

 equivalents of the Lower Cornstone or old Red Sandstone of 

 Herefordshire, England. [Between stations No. 5 and No 6 of 

 Mr. Hugh Fletcher's section] 1 and a few feet below the bed of 

 tufaceous rock 'holding Pteraspis, Cephalaspis and Psammosteus. 



Collector : Mr. T. C. Weston, F. G. S. A. Date : August Gth, 

 1886. The sp^cim^n is now deposited in, and forms part of the 

 collection of Knoydart fossils in the Museum of the Geological 

 Survey of Canada. 



Geological Survey of Canada, 



Ottawa, April 19th, 1901. 



1 See Can. Rec. Science, Vol. viii, No. 5, p. 303, Montreal, January loth, 1901. 



