12 



39. RhaTnnaciniuni porcupinianum Yenh. Wood. 



40. triseriaiim, Penh. Wood. 



41. Salix laramiana, Dn. 



42. raeana, Heer. 



43. Sapindus affinis, Newb. 



44. Sassafras burpeana, Dn. 



45. selwyni, Dn. 



46. Scirpus sp. 



47. S cirjjus sp. 



48. Sequoia hurgessii, Penh. Wood. 



49. langsdorfii, (Brongn) Heer. Wood and leaves. 



50. nbrdenskioldii, Heer. 



5 1 . Symphorocarjjophyllum sp. 



52. alhertum, Dn. 



53. linnceforme, Dn. 



54. Taxites olriki, Heer. 



55. Taxodiuni distichum, Rich. Wood. This is probably the wood of either T. distinchum mio- 



cenum, Heer, or T. occidentale, Newb. 



56. occidentale, Newb. 



57. Thuya sp. Wood. Probably the wood of the next. 



58. interrupta, Newb. 



59. Trapa borealis, Heer. 



60. microphylla, Newb. 



6 1 . Ulmus precursor, Dn. 



62. Viburnum asperum, Newb. 



63. calgarianum, Dn. 



64. oxycoccoides, Dn. 



65. lanceloatum, Newb. 



66. pubescens, Pursh. 



One of the first accounts of the geology of the Tertiary of southern Saskatchewan and 

 Alberta and its contained fossils was given by Dr. James Hector in 1861 (31,393,407-409), 

 but the first complete knowledge of the region was derived from the work of Dr. G. M. 

 Dawson in connexion with the British North American Boundary Commission in 1873-74 

 (6.) and of the Geological Survey of Canada in 1877-78 (S). Reviewingthe data thus brought 

 together, it is to be observed that the Lignite Tertiary extends from east to west, no less than 

 two hundred and sixty miles. In the region of Eoche Percee, the outcrops of lignite are firm 

 and compact, and in many places it shows spots of amber. When exposed by river cutting, 

 the beds present, at the margin, a large amount of clinker giving evidence of combustion 

 of the lignite (5,164). 



From the Souris river westward, the Lignite Tertiary nearly always occupies high ground 

 and frequently forms a well developed plateau resting upon Cretaceous clays, and in the reo-ion 

 of the Great valley and Pyramid creek the lignite beds are exposed at an elevation of about 

 seven hundred feet greater than those last seen on the Souris river. Here, as at Porcupine 

 creek, the Souris river and in the Bad Lands of the United States, the formation consists 

 of beds of lignite interstratified with variously coloured clays and sands, some of which are 

 remarkable for the perfect preservation of numerous plants. Porous material like scoriaceous 

 lava, indurated clays and metamorphosed sandstones is frequently met with, either in place 

 or widely scattered over the surface of the valleys, and is to be recognized as resulting from 



