{(wHiTeaAvEs] FOSSIL FISHES OF THE DEVONIAN ROCKS 261 
“In ©. Campbelltonensis, on the other hand, the front of the 
shield is produced into a pointed rostrum, the cornua are relatively 
longer, the orbits relatively larger than in the preceding species. The 
ornamentation of the cornua and the denticulation of their inner mar- 
gins is more delicate, the former consisting of minute pits and reticu- 
lating furrows, the interspaces between which appear as minute flat- 
tened tubercles. 
“Both of these species seem to be common at Campbellton, but 
perfect shields of ©. Jexi are rare, being mostly broken on one side, 
or else distorted by pressure; whereas those of ©. Campbelltonensis 
more commonly retain their contour complete. As the name Whi- 
teavesi, having dropped, cannot according to the rules of nomenclature 
be again applied to a different species of C Ears I have pleasure 
in dedicating this new one to Mr. Jex.” 
Types.—Head shields in the Edinburgh Museum. 
In the Geological Magazine for January, 1892, Dr. A. Smith 
Woodward had previously described the “squamation of the trunk” of 
a specimen of this species, and had figured one of the scales. 
CEPHALASPIS, sp. indet. 
Cephalaspis, sp. A. Smith ,Voodward. 1892. Geol. Mag. dec. 3, vol. viii, p. 5. 
“A very small, imperfect Cephalaspidian shield from Campbellton, 
with well-separated tesseræ in the middle layer, differs from the corres- 
ponding shield of C. Campbelllonensis, in the relatively larger size of 
the denticles on the inner margin of the cornua. Unless this be a 
character of immaturity, the fossil thus indicates a distinct species. 
Fine granules mark the position of the Vo eSTn: folds.”—A. $. Wood- 
ward, op. cit. supra. 
SUB-CLASS IIL ARTHRODIRA. 
GENUS PHLYCTÆNASPIS, Traquair. 
Phlyctenius, Traquair. Geol. Mag., Jan. and Feb., 1890, dec. 3, vol. vii, pp. 20. 
and 60. (Not Phlyctenium, Zittel, 1878.) 
Phlyctenaspis, Traquair. Geol. Mag., Feb., 1890, dec. 5, vol. vii, p. 61. 
- A. Smith Woodward. 1891. Cat. Foss. Fishes Brit. Mus., pt. ii, 
p. 295; and Geol. Mag., Jan., 1892, dec. 3, vol. viii, p. 5, pl. 1, 
figs. T and 8 
Type of the genus, Coccosteus Acadicus, Whiteaves. 
This species was based upon more than twenty cranial shields and 
a few detached plates from Campbellton collected by Dr. A. H. Foord 
