44 VICTORIA MEMORIAL MUSEUM. BULLETIN NO. I 
specimen of this species. The specimen is doubly interesting, 
for it is from a bed of limestone, so that, instead of being 
crushed flat, as usual, it retains its natural convexity, and fur- 
ther, it retains the cephalon in so good a state of preservation 
as to show the course of the facial suture. And this facial 
suture shows that the writer was in error in referring the species 
to Basilicus. 
The name Ogygiies will be an unfamiliar one, even to students 
of trilobites, for it has hardly been used since the time of its 
original publication, and I am indebted to Brig.-Gen. A. W. 
Vogdes for calling the name to my attention. It appears that 
Tromelin and Lebesconte 1 noted that the name Ogygia had been 
used by Hubner in 1816 for a genus of Lepidoptera, so that it 
was not available when applied to a trilobite by Brongniart in 
1822. They, therefore, replaced it by Ogygites. But they also 
found, following a suggestion by Barrande, that the type- 
species of Ogygia, 0. guettardi, Brongniart, had a forked hypos- 
toma and the facial sutures meeting in a point on the upper 
surface of the cephalon. The discovery compels the exclusion 
of the Ogygias of England and Scandinavia, 0, buchii and 
0. dilatata, from the genus, but fortunately they are taken care 
of by the name Ogygiocaris , proposed by Angelin, with 0. dilatata , 
(Sars), as the type, 
Ogygia , or, properly, Ogygites , as emended by Tromelin and 
Lebesconte from the study of Brongniart’s type, includes 
trilobites which are very similar to Basilicus , Salter, but differ 
in having the facial sutures meeting in a point in front of the 
glabella, instead of running around the anterior margin. 
The specimen recently found by Mr. Ingall shows that 
Asaphus canadensis has this type of suture. The crushed 
specimens previously collected did not show this point, and as 
the species has a strongly segmented pygidium, a narrow axial 
lobe, a definitely outlined ‘glabella, and spines at the genal 
angles, the writer referred it to Basilicus. 
Entire specimens of this species have hitherto, with rare ex- 
ceptions, been found only at Collingwood, Ontario, but Mr 
W. J. Wilson, assistant palaeontologist to the Survey, found a 
number of very good specimens this season in a brown shale 
1 Cat. raisonne Foss. Silur. Assoc. Fr. Avanc. Sc. Cong. Nantes, p. 631, 1876. 
