REVISION OF SPECIES REFERRED TO GENUS BATHYURUS 
65 
Plethopeltis armatus, (Billings). 
Plate VII, fig. 18. 
Bathyurus armatus, Billings, 1860. Canadian Naturalist and 
Geologist, Vol. V, p. 319, fig. 23. 
Found in the pebbles at Point L4vis. 
Family uncertain. 
Genus Goniurus noy. 
{gonia, angle; oura , tail) 
Generic diagnosis. 
Facial suture as in Bathyurus, except that the fixed cheek 
extends a little farther toward the genal angle. Eyes very 
long, narrow, and close to the glabella. Glabella long, reaching 
almost to the frontal margin, tapering rapidly in front of the 
eyes. Neck furrow sharp, extending across fixed and free cheeks. 
Genal angles with short, sharp spines. A narrow, elevated rim 
extends around the whole cephalon, and the cephalon is slightly 
nasute in front. Pygidium convex, triangular, with a long ter- 
minal spine. 
Type: Bathyurus perspicator , Billings. 
Goniurus perspicator, (Billings). 
Plate VII, fig. 10. 
* 
Bathyurus perspicator, Billings, 1865. Palseozoic Fossils of 
Canada, Vol. I, p. 205, fig. 191. 
This species was very abundant in the “ boulder at St. An- 
toine de Tilly.” 
