WHITEAVES.] 



DEVONIAN FOSSILS, MACKENZIE RIVER BASIN. 



247 



Dechenella Haldemani, Kayser. 1880. Zeitschrift der Deutsdi Geol. Gesellsch., 



p. 707, pi. xxvii, fig. 9. 

 Pro(_'lus Haldemani, Walcott. 1884. Pal. Eureka distr. Nevada, p. 210. 

 (?) Dechenella Haldemani, Tschernyschew. 1887. Mem. du Comity Geol., vol. 



Ill, No. 3, p. 14, pi. i, fig. 9. 

 Proetus Haldemani, Hall. 1888. Pal. St. N. Y., vol. VII, p. 113, pi. xxi, figs. 7-9 



and pi. xxlli, figs. 13-15. 



Mackenzie River, at Grand View, several well preserved specimens, 

 and at the " Eamparts," one badly preserved piygidium, E. G. Mc- 

 Connell, 1888. The specimens from Grand View consist of two separate 

 heads, one head and thorax, two separate tails and three with the thorax 

 attached, also of a small flat piece of limestone with one of its surfaces 

 strewn with seven pygidia, one head and the thoracic segments of three 

 individuals of this species. 



In the following lists the species are arranged according to the 

 localities at which they were collected, following the general direction 

 of the drainage of the Mackenzie River and its tributaries, from the 

 south-east to the north-west. 



Pembina River, four miles above its mouth. 

 Spirifera inutilis, Hall. | Atrypa reticularis, var. aspera. 



Clearwater River, east bank, about four miles below the 

 Pembina. 



Orthis striatula, Schlotheim. 

 Atrypa reticularis, L. 



Spirorbis omphalodes, Goldfuss. 

 Ascodictyon stellatum, Nicholson. 



Athabasca River, first ten miles below the 7iiouth of the 

 Clearwater. 



Chonetes Logani, var. Aurora, Hall. 

 Strophalosia productoides, Nicholson. 

 Spirifera tuUia, Hall. Var. 

 Athyris Angelica, var. oceidentalis, W. 

 Atrypa reticularis. 



Atrypa reticularis, var. aspera. 

 Actinopteria Boydii, Conrad. 

 Ptychopteria jequivalvis, W. 

 Leptodesma Demus, Hall. 



