REVISION OP SPECIES REFERRED TO GENUS BATHYURUS 
53 
BATHYURUS JOHNSTON!, SP. NOV. 
Plate YII, figs. 2 and 3. 
This species is very closely allied to B. extans , but is readily 
distinguished by characters which appear to be constant. The 
glabella is closely set with strong tubercles, while in B. extans 
there are only a few very fine scattered tubercles on that portion 
of the head. In B. johnstoni, too, the pygidium is less convex 
than in B. extans , and shorter. This species seems to have 
characters between B. extans and B. longispinus. The glabella 
and pygidium resemble the latter species, but the genal spines 
are as in B. extans. 
Locality .-— This species is common in the Beatricea beds of the 
Lowville at a number of places in central Ontario, notably at the 
locality near the southern fence of lot 26, range YI, of Carden, 
Ont. It also occurs at a similar horizon near Ottawa, below the 
base of the typical Lowville, and above the beds with Bathyurus 
superbus. The locality in which specimens have been collected 
at this horizon is along the Canadian Pacific Railway tracks 
one-half mile west of Mechanicsville, Ont. Named for W. A. 
Johnston, of the Geological Survey, who collected the types. 
Bathyurus sp. 
Plate VII, fig. 6. 
This species is intermediate between Bathyurus extans and B. 
superbus. It has a rounded pygidium with a fairly prominent 
axial lobe, and the pygidium has a wide depressed border; wider 
than in B. extans } but not so wide as in B. superbus. The glabella 
appears to be smooth, and if it has any pustules they must be 
very fine ones, as they do not affect the internal cast. 
I have not named this species, as it was first collected and 
recognized as new by Dr, E. 0, Ulrich, who will probably describe 
it. 
Locality .— This species is fairly common in both the lower and 
upper part of the Pamelia formation in the vicinity of Clayton, 
New York. The figured specimen is from a locality near the 
24853—4 
