174 
HETEROSTRACI. 
//L 
1^7 - 
Several ventral shields of Pteraspidians, not hitherto generically 
determined, have received the names mentioned below. The 
majority are probably referable to Pteraspis , and of the first the 
specimen described by Roemer in 1858 is preserved in the 
Collection (36047. Purchased , 1861). , „ 0 0 
^ r 3 *=>- 
Scaphaspis dunensis , E. It. Lankester, Eishes Old Red Sandst. 
' r p „ ^^UPt. i. (1868), p, 20, woodc. fig. 10: Pteraspis dunensis , 
^ *' ™ L T. H. Huxley, Quart. Journ. Geol. Soc. vol. xvii. (1861), 
p. 163: Pdlaeoteuthis dunensis , E. Roemer, Zeitschr. 
deutsch. geol. Ges. vol. vi. (1854) p. 650, and Palaeonto- 
graphica, vol. iv. (1855), p. 72, pi. xiii. : Archceoteu ^ 
dunensis , E. Roemer, in Bronn’s Leth. GeoguosGX^ 
p. 520, and Heues Jahrb. 1858, p. 55 : ? Scaphcispis bon- 
nensis, C. Schliiter, Sitzungsb. niederrhein. Ges. Bonn, 
1887, p. 125. [Imperfect shield ; University of Bonn.]— 
Lower Devonian ; Eifel. [Imperfect shield, wanting 
__external layer.] ^ ^ 
Scciphaspis elongata , A. von Alth, Abhandl. k. k. geol. Reichs- 
/?&* p. 
anst. vol. vii. no. 1 (1874), p. 51, pi. ii. fig. 4.—Upper 
Silurian (red sandstone); Wojskie, Galicia. 
/Scaphaspis haueri, A. von Alth, ibid. p. 50, pi. iv. figs. 6, 7.— 
// L tfCjfi * Upper Silurian and Lower Devonian; Iwanie, Galicia. 
^ [Imperial Geol. Survey, Vienna.] 
Scaphaspis Jcneri , E. R. Lankester, Eishes Old Red Sandst. pt. i. 
t (Pal. Soc. 1868), pp. 2,19, 20, woodc. fig. 9, and Geol. Mag.^ 
jey>, //»' ^ vol. vii. 1870, p. 398; A. von Alth, Abhajicll. k; kr'gdoi. 
pj. IQj*a** { ( Reichsanst. vol. vii. no. 1 (1874), pp. 48, 75, pi. ii. figs. 3, 
- - —* . OjvAsurft, 7,8: Pteraspis sp.,R.Kner, Haidinger’sNaturw. Abhandl. 
jQ ‘ j t vol. i. (1847), p. 160, pi. v. figs. 1, 2 (?4) : Paiceoteuthis 
2 .k - av- l f s i Jcneri , E. von Eichwald, Analecta Zool. u. Palaeont. Russ- 
/ *** 1 j. j ii'k • lands (1871), p. 5 : Pteraspis Jcneri , A. Ilunth, Zeitschr. 
j r deutsch. geol. Ges. vol. xxiv. (1872), p. 7 ; E. Schmidt, 
Verhandl. russ.-kais. mineral. Ges. St. Petersburg, [2] 
vol. viii. (1873), pi. v. figs. 1-8 (doubtfully assigns to this 
species portions of the dorsal shield of a typical Pteraspis , 
compared with P. croucJii by E. R. Lankester, Geol. Mag. 
[2] vol. i. 1874, p. 288).—Upper Silurian ; Galicia. [Im¬ 
perial Museum, Vienna.] 
Scaphaspis nathorsti, E. R. Lankester, Kongl. Svenska Vetensk.- 
Akad. Handl. vol. xx. no. 9 (1884), p. 5, pi. i. figs. 1-3.— 
/c&faj Lower Devonian; Dickson Bay, Spitzbergen, [Royal 
State Museum, Stockholm,] ^ PP 
XX /./is . 4-/KA- ^ ■ 
