470 PROCEEDINGS: BaSTON SOCIETY NATURAL HISTORY. 
Among the Rensselaeriae described by Clarke from the Moose 
River sandstone are three short, wide forms, R. callida Clarke, 
R. diania Clarke and R. cf. crassicosta Koch, all of which have 
few and strong plications, and almost no characteristics of Rens- 
selaeria. The figures suggest that they are Pcntameroids. 
Horizon and locality. — The specimen was collected from the 
Chapman sandstone at Edmunds Hill, Chapman Plantation, 
Aroostook County, Maine. A single pedicle valve of Spirifer 
sparsa Clarke is on the same fragment. 
Family Calymenidae Milne-Edwards. 
Genus Calymene Brongniart. 
Calymene wigglesworthi, sp. nov. 
PI. 6, figs. 1, 2. 
Type, no. 15077, collection Boston Society of Natural History. 
Description. — Cranidium of average size for the genus, narrow, 
and strongly convex. Glabella high, elongate, nearly parallel- 
sided in front of the eyes, with three pairs of furrows. The an- 
terior glabellar lobes are small, the second pair isolated and oval, 
the posterior pair nearly isolated and subcircular. The dorsal 
furrows are deep and narrow, joining in front and separating the 
glabella from the narrow, upturned rim. Fixed cheeks narrow, 
sloping abruptly at the sides. Palpebral lobes small, opposite 
the second glabellar lobes, and close to the dorsal furrows. Oc- 
cipital furrow narrow on the axial and wide and shallow on the 
pleural lobes. Surface somewhat sparsely covered with small 
rounded granules and small sharp spinules. These are particu- 
larly abundant on the anterior rim. 
Measurements. — Length of cranidium 15 mm. ; width at palpe- 
bral lobes 18 mm.; at genal angles, about 28 mm. (specimen im- 
perfect); length of glabella with the nuchal ring 13.5 mm.; width 
at basal lobes 11.5 mm.; at anterior end 9 mm. 
Comparisons. — But few species of Calymene have as yet been 
described from the American Devonian. Calijmene platys Green 
(Hall, 1888, pi. 1) from the Schoharie is a large form and differs 
from the present species in many respects, the most important 
being the lack of the anterior lateral glabellar lobes. 
Calymene camerata Conrad, from the Cobleskill limestone, as 
