SECTION IV., 1883. ft 327] Trans. Roy. Soc. CANADA. 
Illustrations of the Fauna of the St. John Group. 
By G. F. MATTHEW, M.A. 
(Presented May 26, 1883). 
No. I.—TnE PARADOXIDES. 
(Supplementary Section describing the Parts). 
MOVEABLE CHEEKS. 
No. 1. (Figs. 5, 6 (& 11 2). 
Distinguished by the width of the inner end of the cheek, which is about one-third as 
long as the posterior margin, from the base of the genal spine. 
At and near the front end of the cheek the Wat area and the fold are of about equal 
width. The eyelobe suture is strongly arched. The genal spine is nearly twice as long 
as the posterior margin. The posterior marginal fold is narrow throughout, and at the 
inner end scarcely half as wide as the flat area. 
Sculpture—The anterior marginal fold is traversed on the upper side by about eight (8) 
parallel, anastomosing, raised lines, and on the under side by about eight (8) or ten (10). 
Half way down the spine there are about nine (9) raised lines, most distinct on the outer 
half. The posterior marginal fold has on the upper surface four (4) or five (5) fine, raised 
lines, crowded along its outer margin. The flat area is smooth and somewhat lustrous. 
Length, two (to two and a half) inches. 
Found at Portland and Radcliff Stream in Division 1e. 
This cheek may belong to P. suricoïdes. 
No. 2. Figs. (1 & 3). 
Distinguished by its large and massive genal spine. 
The flat area is more triangular than that of No. 1. The inner end of the cheek in the 
adult is only about one quarter of the length of the posterior margin. The genal spine 
stands out at an angle of 20 or 30 degrees from the posterior margin, and is more than 
twice as long as that part: it is nearly straight for three-quarters of its length, but 
strongly incurved at the tip. 
Sculpture.—The anterior marginal fold is traversed on the upper surface at the genal angle 
by about eleven (11) raised lines (those on the outer third crowded together) *: half-way 
down the spine are about twelve (12) lines equally distributed. On the under surface of 

* This crowding of the lines is common to the cheeks of several species. 
