248 ROYAL SOCIETY OF CANADA 
placed in a new genus, Huphanerops, defined by the presence of the stout 
crbital rims, the regular squamation of small deepened scales, the 
slenderness of the caudal ridge-scales and the apparent absence of other 
well-developed ridge-scales. The species may be named longevus and 
characterized by the proportions of the caudal region and the nature 
of the scale-ornament. The family of Euphaneropide, of which this 
is the first known genus and species, must be referred either to the 
Osteostraci or to the Anaspida. It is distinguished from the Ateleas- 
pide, Cephalaspide and Tremataspidæ by the non-fusion of the tuber- 
cles forming the head-shield. It almost certainly differs from the 
Pirkeniidæ in the absence of a lateral row of perforations at the hinder 
cnd of the branchial chamber, though the actual branchial opening has 
rot yet been seen.” A. Smith Woodward ;—who says also, that the fossil 
upon which this genus is based, “represents a fish-shaped organism 
related to Cephalaspis, but distinguished from that and all known allied 
genera by the absence of a continuous head-shield.” He also states 
that this fossil is the “ first example of an Ostracoderm in which traces 
of the axial skeleton of the trunk have been detected.” 
j (4) EuPHANEROPS LONGÆVUS, Woodward. 
Euphanerops longevus, A. Smith Woodward. 1900. Ann. & Mag. Nat. Hist., 
ser. 7, vol. v, p. 416, pl. x, figs. 1, la, and 10. 
Type.—A nearly entire but somewhat distorted fish, “ preserved in 
the counterpart halves of a nodule”; in the British Museum. 
(5) CEPHALASPIS LATICEPS, Traquair. 
Cephalaspis laticeps, Traquair. 1890. Geol. Mag., dec. 3, vol. vii, p. 16. 
ss st A. Smith Woodward. 1891. Cat. Foss. Fishes Brit. Mus., 
pt. ii, p. 192. 
Type.—One specimen, “ which shows the cranial shield, with badly- 
preserved traces of the body”; in the Edinburgh Museum. 
“Shield proportionately rather broad, length 1% inch, breadth 
234 inches, cornua short; orbits rather close together, oval, large; tes- 
selated divisions of middle layer very small; external surface orna- 
mented by small, smooth, polished and rounded tubercles, moderately 
close in position. 
“This is the first occurrence of a Cephalaspid in rocks of later 
age than the Lower Devonian, and as such is worthy of the attention 
of the geologist.” Traquair. 
