)£. IjtA 
3 i.% 
T '- M 
^ £ l °- ZJr 7 'o 
Scaphaspis obovata , A. von Alth, Abhandl. k. k. geol. Reichs- 
anst. vol. vii. no. 1 (1874), p. 51, pi. iii. fig. 1.—Upper 
Silurian; Dobrowlany, Galicia. 
Scapliaspis racliata, A. von Alth, ibid. p. 50, pi. ii. fig. 6.—Upper 
Silurian ; Zaleszczyki, Galicia. 
Fragments of Pteraspidian shields, not sufficiently complete for 
precise generic determination, are met with in the Lower Devonian 
of Cornwall, and were originally described as fossil sponges by M‘Coy, 
under the name of Stegamclictyum cornubicum h Their fish-like 
character was first noted by C. AY. Peach 1 2 , who collected many 
specimens ; they were subsequently assigned to Pteraspis by J. AY. 
Salter 3 , and finally named Scapliaspis eornubicus by E. R. Lankester 
and H. AYoodward 4 , and J. E. Lee. Numerous fragments from 
Polperro are preserved in the Lee Collection, and the following is a 
larger specimen :— 
38570 (Invertebrate Register). Small slab with portions of a shield 
showing the external striated surface and the middle can¬ 
cellated layer ; Fowey. Purchased, 1858. 
According to F. Schmidt (Yerhandl. russ.-kais. mineral. Ges. [2] 
vol. viii. 1873, p. 136, pi. v. figs. 9, 10), the so-called PaZceoteuthis ~ 
marginalia , E. von Eichwald (Analect. Zool. u. Palaeont. Russlands, w 
1871, p. 5, pi. i. fig. 12), from the Petchora, is a doubtful Pteras- 
pidian ; and to the same family may probably be referred the genus 
and species, Tolypelepis undulatus, C. H. Pander (Foss. Fische Silur. Kecus*- £c. 
Syst. 1856, p. 61, pi. vi. fig. 24), founded upon a fragment of dermal A, 25 / 
plate from the Upper Silurian of Ohhesaar, Isle of Oesel. 
Fragments of dermal plates, perhaps referable to Pteraspidians, yv./PP'' 
and consisting of numerous, irregular, closely arranged, narrow 
shining scales, are met with in the Lower Old Red Sandstone of Here¬ 
fordshire, and named Kallostrakon podura , E. R. Lankester, Fishes 
Old Red Sandst. pt. i. (Pal. Soc. 1870), p. 61, pi. xiii. figs. 20, 21, 
pi. xiv. fig. 6. [Oxford Museum.] The following are specimens of r 
this character:— ($/ 0f XS /A 2^ 
45980. Several fragments, varying in coarseness ; Lower Old Red 
Sandstone, Bush Pitch, Ledbury. Lightbody Bequest. 
1 F. M'Coy, Ann. Mag. Nat. Hist. [2] vol. viii. (1851), p. 481, and Brit. 
Palasoz. Foss. (1851), pl.ii. a. figs. 1-3. 
2 C. W. Peach, Eep. Brit. Assoc. 1843 (1844), Trans. Sect. p. 56. 
3 J. W. Salter, in Wyatt-Edgell, Geol. Mag. vol. v. (1868), p. 247. 
4 E. R. Lankester and H. Woodward, Geol. Mag. vol. v. (1868), p. 248 ; J. 
E. Lee, ibid. [2] vol. ix. (1882), p. 105, pi. iii. figs. 2, 3, 
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