in Western North America. 207 



Walcott. Since this is a Ceratopyge, the identification, 

 if correct, would be of the utmost importance. 



British Columbia. 



I first suspected the presence of the Ceratopyge fauna 

 in British Columbia when I described from isolated speci- 

 mens which had long been in the collection of the Cana- 

 dian Geological Survey, the trilobite Hemigyraspis 

 mcconnelli. 10 It was collected three miles east of Golden, 

 and it is interesting to find it in Mr. Shepard's collection. 



Professor Daly found, 2 miles west of Donald Station, 



B. C, two trilobite s of this fauna which have been 

 described by Walcott 11 as Dikelocephalus % dalyi and 

 Tsinania elongata. The latter is a Symphysurus, and 

 was found also by Mr. Shepard. 



Professor J. A. Allan has given the name Goodsir to a 

 formation, 6,000 feet in thickness, which overlies the 

 Upper Cambrian in the Ottertail Range, and occurs on 

 both sides of the Beaverfoot Range. The strata which 

 are found on the eastern side of the Columbia Valley at 

 Golden belong to this formation. 12 



From the lower portion of it, at a locality 10 miles 

 southeast of Leanchoil, B. C, Allan collected a small 

 fauna from which Walcott described 13 the following new 

 species: Obolus mollisonensis, LinguleUa moosensis, L. 

 ( ?) allani, and Ceratopyge canadensis. While there can 

 be no doubt that this is a faunule of the Ceratopyge zone, 

 the trilobite is hardly sufficiently like the European repre- 

 sentatives of the genus to be included in Ceratopyge. 

 Walcott states that "This species differs from Cerato- 

 pyge forficida Sars in the greater length of the frontal 

 limb of the cranidium, longer palpebral lobes, and nar- 

 rower fixed cheeks. The pygidium differs most in having 

 a short median lobe, broader border, and the side spine 

 springing from the first instead of the second segment.' ' 



All this is true, and it should also be added that the 

 glabella is not definitely outlined, and tapers forward in 



C. canadensis, while it is strongly outlined, truncated in 



10 Geol. Sur. Canada, Mus. Bull. vol. 1, 1913, p. 41. 



11 Smithson. Misel. Colls., vol. 57, 1914, p. 367 and ibidem, vol. 64, p. 228, 

 1916. 



32 Sum. Kept. Geol. Sur. Canada for 1912, 1914, p. 171. 

 13 Smithson. Miscl. Colls., vol. 57, p. 229, 1912. 



Am. Jour. Sci. — Fiftr Series. Vol. Ill, No. 15— March, 1922. 

 lo 



