vol. xx. (3) THE SILURIAN ROCKS OF MAY HILL 
22 1 
Calymene papillata, Lindstrom, var. nov. puellaris. 
This species, described by Lindstrom from beds in Gotland, 
equivalent to the Wenlock Shales has not been described 
from England previously, and I am only acquainted with 
Lindstrom’s 1 figures of an imperfect middle-shield and free- 
cheek and a complete pygidium for its identification. But 
the characters are so remarkable that a description of our 
specimen from M. 24, though it is only in the state of an internal 
cast, is desirable, particularly as it consists of a complete indi- 
vidual and shows some features which suggest that it belongs to a 
distinct variety. The head-shield is not quite perfect and the 
glabella is partly broken away, thus showing a portion of the 
underlying hypostome. The pygidium is somewhat distorted by 
being partly bent under the end of the thorax. It occurs 
associated with C. intermedia. 
Description. — Head-shield parabolic, with genal angles 
rather suddenly bent down and backwards at fulcrum and 
somewhat produced into bluntly-pointed extremities. Glabella 
oblong, rather less than two-thirds the length of the head- 
shield, with anterior end truncated abruptly and its lateral 
angles formed by small papillate projections. First lateral 
lobes very small and indistinct ; second lateral lobes having the 
form of pointed conical papillae directed laterally ; basal lobes 
sub-rhomboidal, rounded, with a slight prominence at the 
anterior outer angle. Pre-glabellar area large, long, slightly 
bent up, gently concave, with indistinctly marked border. 
Axial furrows deep, gently sigmoidal. Cheeks swollen, narrow, 
with inflated portion not reaching, as far forward as front end 
of glabella. Free-cheeks imperfectly known. Border of cheek 
thickened at genal angle, which is pointed, the outer and 
posterior margins being inclined at less than 45 0 . Surface of 
head-shield granulated. Thorax of 12 segments ; axis sub- 
cylindrical, less than one-third the width of thorax ; pleurae 
strongly bent down and curved backwards at half their length, 
having inner portion flattened and nearly horizontal ; tips of 
pleurae rounded, flattened and somewhat expanded ; pleural 
furrow strong. 
1 Lindstro.ii, Ofver. Kongl. Vet. Akid. Forhandl. (1885), No. 6, p. 73, woodcut on p. 74. 
