38 
VICTORIA MEMORIAL MUSEUM. BULLETIN NO. I 
It will be noticed that this plate is much larger in the specimen 
here figured than in the smaller specimen figured by Billings. 
Measurements . —The thorax and pygidium figured are 41 mm. 
long. Glabella 13 mm. long, 15 mm. wide. Cephalon about 
26 mm. wide. The large pygidium is 22 mm. long (without 
spines), and about 45 mm. wide. The most perfect spine is 
15 mm. long. 
This species is similar to “Cheirurus” vulcanus, Billings, but 
has the eye farther forward and farther from the glabella, has 
a flatter and more prominent glabella, and last and more im- 
portant, it has the suture cutting the margin in front of the 
genal angle, instead of at or behind it. 
In “Cheirurus” vuleanus the suture is as shown in Billings’ 
figure (Palaeozoic Fossils, p. 284, fig. 271), and differs so widely 
from the proper suture in the Cheiruridoe as to make one doubt 
if this species belongs to that family. Furthermore, the py- 
gidium which is associated with this form both at Cow head, 
Newfoundland, and Stanbridge, Quebec, is very different from 
that of either Pseudosphcerexochus or N eiszkowskia. “ Cheirurus ” 
prolificus, Billings, which can hardly be separated from C. vul- 
eanus , has the same type of suture, and so does C. mercurius , 
Billings. 
Genus Ceratocephala, Warder. 
Ceratocephala goniata, Warder. 
Ceratocephala goniata , Warder, 1838. American Journal of 
Science, Series 1, p. 373, fig. — Weller, 1907. Bulletin XV, 
pt. II, Chicago Academy of Sciences, p. 255, PI. 23, figs. 1-2. 
Also full bibliography of the species on p. 191 of the same 
Bulletin. 
This species has so far been reported only from a restricted 
area in the general region of Chicago, Illinois, and the writer 
was, therefore, rather surprised to find two typical specimens in 
the Museum, on a tablet with specimens labelled Bronteus 
pompilius, Billings. 
One of the specimens was collected by Sir William Logan at 
Port Daniel, Chaleur bay, in 1843 and is probably the specimen 
referred to by him on page 54 of the “Report of Progress” for 
1844 (Published 1846). After describing Brontes ? canadensis, 
