544 Dr. H. Woodward—On Arthropoda of Coal-measures. 
of the head-shield, occupying a raised, heart-shaped area encircled 
by a depression, outside which is a rounded, raised, laterally encircling 
border divided posteriorly down the centre line by a narrow groove. 
The hinder border of the head is narrower and more angular than the 
anterior, which is slightly rounded. Hach segment of the pre-abdomen 
has a narrow raised ridge along both its anterior and posterior border, 
and there is evidence of a thinner and more membranous wrinkled 
integument uniting the stouter chitinous dorsal plates of the several 
segments together. The two most anterior body-rings are narrower _ 
than the hinder segments, and were perhaps ornamented by one or two 
tubercles upon their surface, in addition to the two raised ridges 
already mentioned on the anterior and posterior border. 
Breadth of head-shield in front, 8mm. ; behind, 7mm.; length, 10 mm. 
Length of chelicere, 24mm. ; of walking-legs, 21mm. 
Breadth of orbital prominence, 5mm. 
Breadth of the 1st segment of the pre-abdomen, 9!mm.; length, 2mm. 
49 2nd i) ” 81 ” ” 3 ” 
29 3rd 99 9 10! ” ” 5 ”? 
oy) 4th Ue) 29 13 De) ue) 6 29 
Ue) 5th ” oe) 14 oe) oe) 6 ” 
The form which most closely resembles this scorpion from Sparth 
(but which unfortunately is also imperfect) was made known by 
Messrs. Meek & Worthen in 1868, from the Carboniferous formation 
of Mazon Creek, Illinois, U.S.A. (see Geol. Surv. Illinois, vol. iii, 
pp- 563-565, figs. A-D), under the name of Mazonia Woodiana. It has 
since been figured in many works, and another example has been 
described from the Carboniferous series of Joggins, Nova Scotia (see 
Scudder, Phil. Trans., 1882, p. 650). It has been relegated by 
Scudder and other subsequent writers to the genus Hoscorpius (see 
Peach, 1882, Thorell, 1885, and Scudder, ‘‘ Fossil Insects, Myriopods, 
and Arachnids,’”? Washington, 1891, United States Geological Survey, 
pp. 25 and 27). Professor Dr. Anton Fritsch, of Prague, in his 
recent work (‘‘ Palaeozoische Arachniden,” Prag, 1904, p. 77), re- 
figures it under the old name of Mazonia Woodiana, M. & W.., fig. 96 
in text, but mentions that Scudder in Zittel (Hastman’s edition) had 
adopted Hoscorpius as the generic name. Jazonia had been repre- 
sented in the figure as having nine segments in its pree-abdomen, but 
that most probably was an error due to some obscurity in its 
preservation or to the duplication of the folds of the integument 
already referred to, which may have looked like additional segments. 
We may rely fully upon Mr. 8. H. Scudder’s determination that only 
seven segments are really present in the pree-abdomen of Mazonia, and’ 
as our specimen has only the five anterior segments preserved we need 
not discuss this point more fully. 
There is sufficient distinctive character in the Sparth specimen, 
when compared with Mazonia, to justify us in giving it a specific 
name, and I gladly comply with the desire of my friend Mr, W. H. 
Sutcliffe to identify it as LHoscorpius (Muzonia) Wardingleyi, after 
Mr. Charles Wardingley, F.G.S., of Edinburgh, who carried on 
1 The true breadth of the 1st, 2nd, and 3rd segments is uncertain, as a part of the 
left side is buried in the matrix, and the nodule resists development. 
