TRILOB ITES IN VICTORIA MEMORIAL MUSEUM 
35 
Genus Holasaphus, Matthew. 
Holasaphus moorei, sp. nov. 
Plate III, figs. 7, 8, 9, 10, and 11. 
The genus Holasaphus was proposed by Dr. Matthew 1 to 
include a species with an asaphid-iike pygidium which bore a 
terminal spine, and with a cranidium much like Bathyurellus, 
Dr. Matthew seems to place it in the Asaphidse, but the writer 
hesitates to do so, at least until more perfect specimens are 
obtained. The discovery of a new species belonging to this 
genus, at a very different locality and horizon, is of consider- 
able interest. The present species is represented by four or five 
more or less perfect pygidia, a portion of one cranidium, and two 
free cheeks. An associated hypostoma probably belongs with 
this material. 
Description. 
Glabella very low, oval in outline, surrounded by faint dorsal 
furrows. There are faint traces of two pairs of glabellar fur- 
rows. Neck ring wide, smooth, neck furrow narrow, shallow. 
Eye large, situated far back; fixed cheek narrow, grooved by 
the neck furrow. Facial suture curves outward from the eye 
to the anterior margin. Free cheek rather wide, low, with a 
slightly elevated border. The genal angle bears a spine which 
diverges widely from the axial line of the body. 
Thorax unknown. 
Pygidium convex, with a strongly convex axial lobe which 
rises high above the side lobes. The posterior end of the py- 
gidium bears a short, sharp spine, which is an extension of the 
margin and not of the axial lobe. The pleural lobes have four 
pairs of ribs and the axial lobe four rings. There is a wide, 
depressed, but hardly concave border which is faintly marked 
by the ribs. The surface of the test is roughened by numerous 
fine, irregular impressed lines. 
The associated hypostoma is one which strongly resembles 
the hypostoma of Megalaspis , and furnishes an argument in 
favour of admitting this genus to the family Asaphidse. The 
body portion is strongly convex, and it is slightly constricted 
1 Transactions Royal Society Canada, 3rd series, Vol. I, p. 268. 
