NEW SPECIES OF CAMBRIAN FOSSILS FROM CAPE BRETON, 
283 
distant, and having the inner extremities turned backward ; the inner 
half of the posterior furrow is deeply indented, the middle furrow is 
m rre evenly impressed, and the anterior furrow is more distinct in 
the outer half, which is at the anterior corner of the glabella. The 
occipital ring is of nearly even breath, has a tubercle on the axial line, 
and has a triangular lobe at each end on the anterior side, due to a 
faint furrow that crosses the ring diagonally. The fixed cheek is 
triangular, and at the front of the evelobe as wide only as two-thirds 
of the space between the glabellar furrows ; the eyelobe is opposite 
the space between the second and third furrow of the glabella, and 
there is a short ocular fillet extending diagonally out to it from the 
anterior corner of the glabella. The posterior marginal furrow and 
fold are distinctly marked. 
The movable cheek is more strongly arched in front than behind, 
and, like the middle piece of the headshield, has a sharp, narrow 
marginal fold ; the area of the cheek is somewhat wider in front than 
behind, and the proportion in length of the three cords of the facia} 
suture are 1, 1, 2|. There is a narrow, sharp genal spine, of un. 
known length, projecting backward from the outer angle of the cheek. 
The thorax has narrow rings with narrow pleurie, having sharp 
backward-curved points. The thoracic rings have triangular lobes at 
the outer ends and a median tubercle, like the occipital ring. The 
pleurie have a sharp, oblique furrow, extending to the geniculation. 
A hypostome supposed to belong to this species has a large, oval 
anterior lobe, narrower behind ; an upturned margin borders it at the 
sides, but at the back is broken away. 
The pyyidium has two well marked rings to the rachis, each sur- 
mounted by a tubercle, and a posterior lobe which is obscurely divided 
into two somites. The side lobes have two faintly marked ribs with 
diagonal grooves, and the borders of the side lobes are flattened. A 
small backward, outward projecting spine is placed at the anterior 
corner, on each side. 
Sculpture . — The area in front of the glabella is ornamented with 
forking and anastomosing raised lines, radiating toward the anterior 
margin. The glabella appears smooth, but under a strong lens is seen 
to be minutely punctate, or even obscurely reticulate with raised lines. 
The movable cheek, like the area in front of the glabella, is ornamented 
with distinct raised lines, giving a reticulate surface ; toward the 
marginal fold these lines are forked and directed outwards 
