56 
VICTORIA MEMORIAL MUSEUM. BULLETIN NO. I 
the same locality by Jones, have to be removed to the Beekman- 
town. 
Bathyurus angelini proves to be exceedingly abundant at and 
near Grenville, and its most noticeable specific character is one 
pointed out by the writer in his previous description of the species, 
namely, the extension of the axial lobe across the border at the 
posterior end of the pygidium. The writer was, however, in 
error in calling the outline of the pygidium semi-circular, as it is 
really sub-triangular; much the same outline as in Bathyurus 
extans, but a little more pointed behind. The surface markings 
are also characteristic, the test, when preserved, being strongly 
granulose. The eyes are very large, and the border in front 
of the glabella very narrow and concave. 
The hypostoma is like that of B. extans , except that the body 
portion is very much more convex. 
Bathyubtjs acutus sp. nov. 
Plate VII, fig. 4. 
This species is based upon a number of fragmentary specimens. 
A very perfect pygidium is selected as the holotype, and two 
cranidia, an hypostoma, a free cheek, and a larger pygidium are 
used as paratypes in making up the description. 
Desmpfe'tm.—Glabella regularly convex, rounded in front, ex- 
tending nearly to the front of the cephalon, and limited in front 
by a narrow concave border. Surface smooth, without pustules, 
marked only by two pairs of faint furrows. Neck furrow narrow, 
and rather deep. 
Fixed cheeks narrow, impressed by the neck furrow. Eyes 
large, close to the posterior margin. Free cheek with a rela- 
tively short genal spine. 
Thorax unknown. 
Pygidium triangular, the posterior end bearing a short acute 
spine. The axial lobe is narrow and prominent, with two rings 
beside the half ring in front. Otherwise smooth. On the pleural 
lobes there are four pairs of unfurrowed ribs, which extend across 
the concave border to the margin. Surface very finely granulose. 
The hypostoma of this species is more like that of B. angelini 
than that of B, extans , as it has a rather convex body-portion. 
