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VICTORIA MEMORIAL MUSEUM. BULLETIN NO. I 
hardly to be called common, in the lower Trenton of Ontario. 
It appears to be a direct descendant of Bathyurus spiniger, but 
as it is very imperfectly known, better specimens may show that 
it is less closely related than it now seems to be. It is distin- 
guished from all other species of the genus by the great size of 
the spine on the neck-ring. The eranidium is the only portion 
known. The glabella is covered with rather large tubercles, 
and the glabellar furrows are obsolete. On a specimen in which 
the eranidium is 22 mm. long, the spine on the neck ring is 16 
mm, long. This spine is stout, circular in section, tapers regu- 
larly, and the surface is smooth except near the base, where 
there seem to be a few tubercles. The eyes are large, and close 
to the posterior margin. 
Locality; — The type is from the lower part of the crinoid beds 
near the Lift-lock 2 miles north of Kirkfield, Ontario, where 
a number of specimens were collected by Mr. W. A. Johnston 
and the writer. There has long been a specimen of this species, 
collected at Belleville, Ont., on exhibition in the Museum under 
the name of B. spiniger. This is from about the same horizon 
as the last, that is, within 50 feet of the base of the Trenton. 
The writer has also collected it near Ottawa, in an old quarry 
on the first road beyond the cemetery in Eastview, in the lower 
part of the cherty crinoid beds, and about 60 feet above the base 
of the Trenton. 
Bathyurus schucherti, clarke. 
Bathyurus schucherti } Clarke, 1897. Palaeontology of Minne- 
sota, Vol. Ill, Pt. II, p. 724, figs. 41, 42. 
This species is allied to B . ingalli, but has the glabella smooth 
and only a short spine on the neck ring. The type was from 
the “Lower Buff” limestone at Minneapolis, Minn. 
Genus petigurus nov. 
( Peiigo , scab; oura, tail.) 
The trilobites of this genus are apparently closely allied to 
Bathyurus , but differ in the following points: — 
The facial suture reaches the posterior margin near the genal 
angle; the anterior end of the glabella overhangs the concave 
