H, Woodward—EKEurypterus Lanceolatus. 107 
III. On a Nearty PERFEcT SpecIMEN oF EuryPreRuUs LANCEO- 
LATUS (SALTER) FROM THE Urrer Luptow Rock at Lesma- 
HAGOW, LANARKSHIRE. [Plate V. figs. 7-9. | 
By Henry Woopwarp, F.G.S., F.Z.5, 
HIS species (under the generic name of Himantopterus) 
was first noticed by Mr. J. W. Salter in the Quarterly 
Journal of the Geological Society for 1856 (vol. xii. p. 28, 
fig. 5); but only the penultimate segment and telson* were 
then known. 
In vol. xv. of the same Journal (1859), Mr. Salter described 
eight species of Lurypterus, from the Upper Ludlow Rocks 
and the Old Red Sandstone; but he did not refer to EL. lanceo- 
latus in that paper. Of these eight species of Lurypterus, 
LE. pygmeus, from its smaller size, is the best preserved species. 
It occurs in the Downton Sandstone of Kington, in the Base- 
ment-beds of the Old Red Sandstone at the Ludlow Railway, 
and in the Upper Ludlow Rock of Ludford; and I have lately 
seen an entire specimen (in the cabinet of Mr. Jas. Powrie, 
F.G.S.), only one inch in length, from the Old Red Sandstone 
of Petterden in the Sidlaw Hills, Forfarshire. 
EE. acuminatus, linearis, and abbreviatus are still only known 
to us by their telsons or tail-joints. &. chartarius Mr. Salter 
is now inclined to consider only an obscure specimen of £. lan- 
ceolatus; but the original specimen I have never seen. £. 
Symondsit is now known to belong to a distinct genus (Stylo- 
nurus, Page), upon the evidence of more perfect specimens 
discovered by Messrs. J. Powrie and R. Slimon.f Probably 
E. megalops may also be shown to be distinct from L'urypterus. 
These two last-named species are only known by their cara- 
paces; but they are well-marked forms. 
In the ‘ Memoirs of the Geological Survey’ (1859), Mono- 
eraph I., ‘On the Genus Péerygotus, by Prof. Huxley and 
Mr. J. W. Salter, the entire body, with the swimming-feet, of 
a specimen of Hurypterus lanceolatus is described and figured 
(p. 65, pl. 1, fig. 17); but, owing to the imperfect state in 
which the fossil is preserved, it was impossible to give a very 
detailed description of the separate parts, or even to be quite 
certain (except from the spine-like form of the caudal joint) 
that it was a true Lurypterus, as it was the only specimen 
then known. 
Mr. Slimon, of Lesmahagow, from whom all the Lanarkshire 
* Terminal joint, or tail-plate. 
} To be described and figured in a future Number. 
