169 
PTERASPID 
1868), p. 33, pi. v. figs. X 2, 6, 10, 11 : Pteraspis , 
LL Mitchell, Geologist, vol. vii. (1864), p. 117, woodc.— 
Lower Old Bed Sandstone; Forfarshire. [Internal cast?- 
of shield; Ttn n r!o ^ Ar>w^wn .] £ y 
Pteraspis podolica , A. von Alth, Joe. cit. p. 42, pi. i. figs. 5-10, 
pi. ii. fig. 1.—Upper Ludlow ; Zaleszczyki, Kriszczatek, 
and Dobrowlany, Galicia. [Shields, wanting rostrum, but . 
with relatively large cornua, £** <x< ■ ‘ 6 ^ g t 
Pteraspis rhenana,C. Schliiter, Sitzungsb. niederrhein. Ges., Bonn, ct ^°^^ 
1887, p. 125.—Lower Devonian; near Bonn. [Portion 
of median disc : University of Bonn.1 .=■ /P ' Sa 
The impression of the inner aspect of an imperfect median disc of 
Pteraspis from the Upper Silurian (or Lower Devonian) of Galicia is 
named “ Pterichthys? ” by E. Kner, Haidinger’s Xaturw. Abhandl. 
vol. i. (1847), p. 107, pi. v. fig. 3 : see also Scaphaspis hneri, p. 174. 
^A^ e ncot8f»s .wrMX 
Genus"PALiEASPIS, Claypolef 31 ' m ‘ M ' tHl * Cl O ^ 
[Amer. Naturalist, vol. xviii. L , p. 1224.] P 3y~7 * 
Syn. HoJaspis, E. B. Lankester {non J. E. Gray, 1863), Geol. Mag. 
vol. x. 1873, p. 242. 
Scaphaspis, E. E. Lankester, Eep. Brit. Assoc. 1864 (1865), 
Trans. Sect. p. 58 (in part). 
Dorsal shield resembling that of Pteraspis in form, but apparently 
consisting of a single plate and destitute of a median dorsal spine. 
Orbits forming notches in the shield at the base of the rostrum, not 
completely enclosed. 
This genus was first defined by Lankester under the preoccupied 
name of HoJaspis , and the type species is P. sericea. 
Palseaspis sericea (Lankester). 
1873. HoJaspis sericeus, E. E. Lankester, Geol. Mag. vol. x. pp. 241, 
331, pi. x. and woodc. 
Type. Dorsal shield ; British Museum. 
Shield narrow and elongated, the rostral region sharply rounded 
and much broader than long; lateral margins, when uncrushed, 
apparently bulging outwards immediately behind the orbits, nearly 
parallel in the hinder half ; posterior margin angulated mesially. 
Form. $ Loc. Lower Old Eed Sandstone (Cornstones) : Aberga¬ 
venny, Monmouthshire. 
P. 4117. Type specimen described and figured by Lankester, Joe. cit. 
Presented Joy Dr. D. M. McCullough, 1883. 
/% / . . ‘ r . s~Tc* i- ns*— • } "/• t $ 
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