332 DESCRIPTION OF DEVONIAN TRACKS, ETC.—AMI. 
TABLE SHOWING LENGTH OF STRIDE, STEP, OR SPACE BETWEEN IMPRESSIONS 
MEASURED FROM THE APICES OF THE MONTICULES. 
PAIRS OF Between | Setween |Between | Between | Between | Between | Between 
TRACKS. Ist & 2nd | nd & 3rd./3rd & 4th |4th & Sth./5th & 6th.|6th & 7th. |7th & 8th. 
IDG A eeaondodaGe 18.00 mm.}16.00 mm. | 15.50 mm.}14.50 mm.)} 17.00 mm |15.50 mm.|17 50mm. | 
IRVINE Gocoua 6c -/17.50 mm. |15.50 mm. | 15.25 mm |16 50 mm.|17.00 mm.|15.59 mm. }17.50 mm. 
It will thus be seen that the length of steps or space between 
the impressions are at comparatively equal distances, and in the 
naighbourhood 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 Jchthyotdichnites Acadiensis is suggested with a 
view of indicating the locality 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 MeArras Brook along the shore or post- 
road near the schoolhouse at MeArras Brook, P. O., Antigonish 
Co.. Nova Scotia; in the dark red and drab, evenly-bedded, fine- 
grained siliceous and jointed mudstones of the Anoydart torma- 
tion of early Devonian (H»-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} 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 6th, 
1886. The specimen is now deposited in, and forms part of the 
enllection of Knoydart fossils in the Museum of the Geological 
Survey of Canada. 
Geological Survey of Canada, 
Ottawa, April 19th, 1901. 
1See Can. Rec. Science, Vol. viii, No. 5, p. 303, Montreal, January 15-h, 1901. 
