260 ROYAL SOCIETY OF CANADA 
of which was figured to show the rostrum. The peculiar rostrum of 
this species, Dr. Woodward adds, is “solid, much resembling that of 
Pleraspis.” “Tt is well shown,” he says, “in the type specimen, 
though accidentally omitted in the original description and restored 
outline.” 
In a paper published in the Geological Magazine for April, 1893, 
and entitled Notes on the Devonian Fishes of Campbellton and Scau- 
menac Bay in Canada, No. 2, Dr. Traquair writes as follows, in regard 
to this species: 
“In my former paper, I recognized two distinct species of Cepha- 
laspis from the Campbellton beds, one having the cephalic shield 
rounded in front, the other in which it assumed a pointed form like 
the snout of a skate.” Misled by Mr. Whiteaves’s figure, I referred 
the former to his C. Campbelltonensis; to the latter I attached the 
name of C. Whiteavesi.” 
“Mr. Smith Woodward having had subsequently the privilege of 
inspecting the original type of C. Campbelltonensis, found that it 
actually possessed the pointed rostrum characteristic of my C. Whi- 
leavesi, which rostrum had been omitted in the drawing published by 
Mr. Whiteaves. Consequently, my species had to go, though it was 
clear that there was something still to be determined regarding the 
species of Cephalaspis occurring at Campbellton.” 
“The mystery is quite cleared up by the specimens in the present 
collection;1 there are two species, but the new one is that with the 
rounded snout, which I shall describe under the name of Cephalaspis 
Seri: 
(9) CEPHALASPIS JEXI, Traquair. 
Cephalaspis Jexi, Traquair. 15y3. Geol. Mag., dec. 3, vol. x, p. 147. 
Original description.“ Cephalic shield rounded in front, cornua 
incurved, comparatively short and stout; the orbits relatively smaller 
than in C. Campbelllonensis, situated nearly midway between the 
anterior and posterior extremities of the shield. The external orna- 
ment of the shield consists of minute closely set tubercles often tending 
to be arranged in concentric lines which are parallel to the borders of 
the tesseræ. On the cornua the tubercles are not so close, showing 
intervals which are finely longitudinally striated. The inner margins 
of the cornua are distinctly denticulated. 
*1e., in the selection made by Dr. Traquair for the Edinburgh Museum, 
from specimens collected at Campbellton and Scaumenac Bay by Mr. Jex 
in 1892. 
