218 DESCRIPTION OF THE SPECIES OF PTERYGOTUS 
fig. 4a. [It is desirable to find out the post-oral plate of Eurypterus ; 
which is probably very similar. ] 
The sculpture is very conspicuous over the upper half; it consists. 
of nearly straight or very slightly curved plice arranged in arched 
lines and ending abruptly against the outer margin. In the sand- 
stone specimens the sculpture does not extend so far down, but it 
is identical in structure. 
Localities —UPPER LUDLOW Rock, Ludlow Lane, Whitcliffe (and 
Batchcot? fig. 46); Parlan, exterior slope of the Woolhope Valley 
(Mus. P. G.); Kington, Herefordshire (Mr. R. Banks’ cabinet). 
PASSAGE-BEDS, Ludlow Railway cutting (Cabinets of Messrs. Light- 
body and Marston, at, Ludlow; Museum Pract. Geol.), &c. 
PLATE NII. [PLATE 23] Fic. 47. 
P. StTyLops. 
P. parvulus, capite (parte anticd solum asservata) 9 lineas lato, convexo, 
guadrato, fronte (fracto) producto ? lateribus rectis, oculis ad angulos externos 
fixts, magnis, turgidis. 
This remarkable small carapace, the anterior part of which only 
is preserved, has occurred to the assiduous search of Mr. R. Banks, of 
Kington. 
Only the anterior part is preserved, and even of this the frontal 
portion between the eyes is broken off; it was perhaps less _pro- 
minent than the dotted lines indicate. The forward position and 
round form of the great eyes very much assimilate the species to: 
P acuminatus, and without doubt it belongs to the same section, or 
the true Prerygotus. 
The eyes are remarkably prominent and turgid, a slightly raised 
fold of the carapace encircling them. A small tubercle, like that on 
the same part in P. gigas, Plate XII. [Plate 23], occurs on the 
median line of the head, and rather nearer to each eye than their 
distance from one another. As only a single broken specimen has 
occurred it is useless to describe it further. There can be no doubt of 
the distinctness of the species. 
Locality.—Kington. (Coll. Mr. R. Banks, of Kington.) 
