516 B. N. PEACH ON FURTHER RESEARCHES AMONG THE 
antennules, antenn, and tail, show them to have been lowly decapods in which 
the parts have not been so much specialised as in their neighbours the Anthra- 
paleemons. om 
Dr. Woopwarp has described another species of this genus in the interval 
between the reading and publishing of my former paper. As his specimens 
were obtained in 1876, they bear away the priority which I supposed the 
Eskdale fossils to have enjoyed as having been the first of the genus found 
in Britain. 
Class I]. ARACHNIDA. 
Under this class I propose to rank a set of animals which have usually been 
placed among the Crustacea, by what I consider a straining of the comparatively 
few analogies which exist in common with them and undisputed orders of that 
class, while the eyes have been shut to the more numerous and conspicuous 
affinities with the Arachnida through the scorpions. In this I only follow 
StrAus- DurcKkHEIM, VAN BENEDEN, RAy LANKESTER, and many other 
naturalists. 
Order MEROSOMATA. 
Suborder EURYPTERIDA. 
Numerous specimens, which would certainly have been ascribed to 
Eurypterus, have been unearthed by the Survey Collectors from the Carboniferous 
rocks of the Borders within the last year or so. These, though fragmentary, 
are sufficient to add some small items of positive evidence in support of the 
inference that the ancestry of our recent scorpions was through the Eurypterids, 
and that the Carboniferous Eurypterus was probably a land animal, and. there- 
fore distinct from the discovered Silurian and Old Red members of that genus 
which were aquatic. As some at least of the Carboniferous Eurypterids were 
supplied with combs and walking feet ending in two claws, undistinguishable 
from those of scorpions, I propose to erect a genus for the reception of such 
as bore them. 
Genus G'lyptoscorpius, gen. nov. 
Segmented animals with horny integuments sculptured as in Eurypterus, 
composed of carapace with sub-central simple eyes, and twelve other body 
segments, and provided with comb-like appendages, as in scorpion, the walking 
legs having bi-ungulate tips. 
