Dr. H. Woodward — M. Cambrian Fossils of the Rockies. 503 



of the Castle Mountain limestone, and that the Middle Cambrian 

 fauna occurs 2,000 feet above." ^ 



Subsequently Mr. Otto Klotz, whilst engaged on geodetic measure- 

 ments in connection with the astronomical work of the Canadian 

 Dominion, accidentally discovered the Trilobite bed on Mount Stephen, 

 and presented the specimens he collected to the University of 

 Michigan, his Alma Mater. The specimens afterwards were placed 

 in the hands of Dr. C. Rorainger, who described them in the 

 Proceedings of the Academy of Natural Sciences, Philadelphia, 1887, 

 pp. 12-19, pi. i. The descriptions are explicit, but the figures are 

 not satisfactory, and I hope shortly to figure these Trilobites more 

 fully. Meantime I am able to submit clear outline drawings of 

 most of the species. 



Dr. H. M. Ami, M.A., F.G.S., Assistant Palaeontologist to the 

 Geological Survey of Canada, Ottawa, who has visited Mount 

 Stephen and geologized upon its slopes, kindly informs me that the 

 beds containing the Trilobites represent about 300 feet in thickness. 

 They form the summit of Mount Field, and rest at about 6,580 feet 

 up on Mount Stephen ; the summit of this latter mountain is com- 

 posed of Palgeozoic limestones, about 2,000 feet in thickness above the 

 blacTc Trilobite shales, the fauna of which has not yet been examined. 

 Beneath the latter there are about 1,000 feet of calcareous and 

 siliceous shales, while basal sandstones make up the residue. 



Section of 

 Mount Stephen. 



1. At summit: Palaeozoic limestones, 



fauna not yet examined 2,000 feet Probably Upper Cambrian. 



2. Black Trilobite shales 300 to 400 feet Middle Cambrian fossils 



abundant (Walcott). 



3. Limestones and shales, calcareous 



and sUiceous shales 1,000 feet 'i Lower ? Cambrian series (no 



4. Sandstones, basal sandstones ... 1,530 feet j fossils). 



One feature of the scenery is that the mountains (as a whole) are 

 nearly all carved vertically. 



Mr. S. H. Reynolds, M.A., F.G.S., has brought back a series of the 

 fossils from Mount Stephen (Field) ; these are now in the Wood wardian 

 Museum, Cambridge, and a small, perhaps larval form has been 

 described and figured by Mr. F. R. Cowper Reed, M.A., F.G.S. (in 

 the Geol. Mag., 1899, Dec. IV, Vol. VI, pp. 358-361), and named 

 Or y otocephalus Beynoldsi. 



Dr. G. F. Matthew, Mr. C. D. Walcott, and Dr. Rominger have 

 all described fossils from this locality, and the Survey of Canada at 

 Ottawa has a fine collection made by their own officers and also by 

 Mr. Byron Walker, F.G.S., of Toronto. The following fossils have 

 been met with at Mount Stephen, viz. : — 



1 " Eeport on the Geological Structure of a portion of the Eocky Mountains " : 

 Geol. and Nat. Hist. Surv. Canada, new series, vol. ii (1886-7), pp. 28-30d, with 

 section. 



