t68 
PROCEEDINGS COTTESWOLD CLUB 
1916 
Proetus. From the above considerations we may regard this 
Usk form as at any rate a distinct variety of Pr. Stokesi. if 
not a distinct species. Hall’s^ Proetus (?) Stokesi (Murch.), 
from the Niagara group of New York, is certainly not identical 
with Murchison’s species, so far as we can judge from the 
description and figures. 
Proetus signatus Lindstrom. [PI. VIII., fig. 12]. 
Remarks. — One cast of a complete head-shield of a species 
of Proetus, with the genal angles somewhat imperfect, occurs 
in Mr Gardiner’s Usk collection, .and it appears to be 
indistinguishable from Pr. signatus Lindstrom," from Gotland, 
of which the free cheeks were not figured. The shape and 
length of the glabella, the character of the lateral glabellar 
furrows, the size and position of the eyes, the course of the 
facial sutures, the size of the occipital lobes, and the nature 
of the border and marginal furrow agree precisely with the 
figure and description. The free cheeks are seen to have been 
slightly produced backward at the genal angles, ending in 
short stout spines. 
Dimensions : Length of head shield 8-o% 
Width of ditto . . 17-0 ,, 
Length of glabella. . 6-i ,, 
Width of ditto . . 3-5 ,, 
Horizon and Locality. — Ludlow beds near Hilla Farm, 
one mile North-East of Bettws-Newydd. 
Calymene intermedia, Lindstrom. 
Remarks. — It does not seem to be the case that Cal. 
intermedia has been previously recorded from the British 
Isles, but this fact may be due to the loose way in which the 
name C. Blumenbachi has been used to cover more than 
one species. The Usk specimens which seem to agree with 
Lindstrom's species C. intermedia,^ are of small size, none of 
the head-shields measuring more than 7% in length. In 
the Russian Baltic provinces this species Occurs in Stage K 
(Upper Oesel Stage). 
1 Hall, Palaeont. N. York, vol. ii. (1852), p. 316, pi. 67, figs. 13, 14- 
2 Lindstrflm, Ofv. K. Vet. Akad. Forhandl. (1885), No. 6, p. 80, t. xv., fig. 16. 
3 Lindstrom, Ofv. K. Vet. Akad. Forhiindl. (1885), No. 6, p. 71, t. xv.,figs. 5-12 ; Schmidt, 
Rev. Ostbalt. Silur. Trilob. Abth. iv. (1804), P- 16, t- ii-, figs- 1-3 : Moberg and Granwall, Om Fyle- 
dalens gothlandium, Kungl. Fj-siogr. Sallsk, Hiindl. (1909), Bd. 20, No. i, p. 71, t.iii., figs. 15, 16, 
