58 F 
EKWAN mVKR. 
Ulcmufi, sp. indet. 
Ekwan river ; niiddle rapids, one nygidiuin ; foot of portage 
road, three glabelh.e and four pygidia ; portage road at falls, one pygi- 
dium. The dorsal furrows of these three glabellie are well defined, but 
the shape and position of the eyes or ocular lobes are not well 
shown in either. 
Brontenn Ekicnmnsis, sp. nov. 
Pygidiuin very large, attaining to a length of a little more than four 
inches and a little longer than wide, longitudinally and broadly subel- 
liptical but truncated anteriorly, its po.steric»r end t>eing rather narrowly 
rounded and its lateral margin nearly .straight on each ^ide anterior to 
the midlongth, A.'ds uiiideratoly convex, in\ ersely subtriangular, longer 
than wide, with an obtuse apex, occupying more than one third but less 
than one-fourth of the entire length of the pygidium and markcti with a 
transverst* groove near its anterior margin. T'leural region most pro* 
minent at and near the iiiidleugth of each of the ph-ural ribs, <lecreasing 
abruptly in convexity outw.arfl to the laieral margins of the py.gi(liuiii, 
but much more gradually so to its posterior margin ; marked by fifteen 
large flattened convex radiating ribs, with narrow grooves between 
them ; each rib being narrow at; and near the axis and wi«ler at some 
distance from it. though all the ribs fade out at a short di.stance 
from the margin and before reaching it. The median rib is shallowly 
bifurcate posteriorly. 
Surface apparently .smooth. Cephalon and thora ic segments un- 
known. 
Ekwan river : lower rapid one. imperfect pygidium ; middle rapid, the 
largest and most perfect pygidium collected ; and foot of portage road, 
one imperfect pygidium and two fragments. 
Bronteas lu/iiiloniiris, sp. nov. 
Pygidium of medium size, apparently not exceeding an inch and a 
half in width, transversely subelliptical and much wider than long, with 
an almost flat hut slightly convex axis, and still flatter pleural region. 
Axis short, inversely subtriaugular, with an obtuse apex and somewlu.t 
concave sides, nearly t A’ice as wide, as lung, almo.st .smooth but marked 
with one tran.sverse furrow near the anterior margin ; median rib a 
little wider than any of the lateral ribs ami bifurcate posteriorly ; 
lateral ril>s seven on each side, straight and flattened convex, all of the 
ribs fading out before reaching ttie margin. 
Surface apparently .smooth. Cephalon and thoracic segments un- 
known. 
