482 Dr. H. Woodward—Synopsis of the Species of 
General form ovate-oblong; head-shield arcuate, glabella large, 
gibbous, over-hanging the anterior border; basal lobe pyriform ; 
neck-lobe broad, separated by a wide furrow above and below; eyes 
small, reniform, smooth ; raised portion of free cheek, glabella, and 
neck-furrow coarsely and irregularly granulated, margin of free 
cheeks smooth, lateral angles not produced into cheek spines, tho- 
racic segments nine, axis wider than pleure, only diminishing very 
slightly towards the pygidium; each segment ornamented by a 
single row of coarse granules (about eight on each side and ten on 
the axis); axal furrows strongly marked; segments arched, ends 
of pleuree rounded, faceted portion smooth ; pygidium composed of 
twelve coalesced somites, axis tapering gradually to an obtuse ex- 
tremity; side ribs about nine, ornamented each by a single row of 
tubercles eight to ten on axis, about eight on each pleura; margin 
of pygidium narrow, edge bevelled. 
Hypostome, Pl. XII. Fig. la, broad and short, wings not distinct 
from central lobe; obliquely striated, free extremity rounded and 
emarginated. 
Formation.—“ Rotten-stone Band,” Carboniferous Limestone. 
Localities.—Matlock, Derbyshire; Settle, Yorkshire; and Black- 
rock, near Dublin. 
Specimens have been examined from the British Museum, the 
Woodwardian Museum, and the collection of Joseph Wright, Esq., 
F.G.8., of Belfast. 
GRIFFITHIDES GLOBICEPS, Phillips, sp., 1836. Pl. XII. Fig. 2 
Asaphus globiceps, Phillips. 1836. Geol. Yorks, vol. ii. p. 240, pl. xxii. figs, 16-20. 
Griffithides globiceps, Portlock. 1843. Rept. Geol. Londonderry, p. 311, t. xi. figs. 
9a, . 
Phillipsia globiceps, De Koninck. 1844. Anim. Foss. Terr. Carb. Belgique, p. 599, 
tab. lin. fig. 1. 
Grifithides globiceps, M‘Coy. 1844. Synopsis Carb. Foss. Ireland, p. 160. 
—_—___— _ —_———— Oldham. 1846. Journ. Geol. Soc. Dublin, vol. ili. pt. 3, p. 
188, pl. 2. 
Morris. 1854. Cat. Brit. Foss. p. 109. 
Salter and Woodw. 1865. Cat. and Chart. Foss. Crust. p. 
16, fig. 117. 
H. Woodw. 1877. Cat. Brit, Foss. Crust. Doig 
H. Woodw. 1883. Pal. Soc. Mon. Carb. Trilob. part i. p. 
29; pl. vi. figs. 1, 3, 4, 5, 6. : 
General form ovate-oblong, head elevated, glabella very gibbous, 
overhanging the anterior border of shield, contracting rapidly to 
about half the width behind, where it unites with the neck-lobe ; 
basal lobes prominent, triangular, to which the eyes seem to be 
united without the intervention of any fixed cheek; but there is a 
very narrow border united to the glabella forming the palpebral lobes 
which join the lateral lobes, or nearly so; neck-lobe moderately 
broad, axis strongly arched : lateral portion crossed by cheek-suture 
obliquely ; eyes very small but exceedingly prominent ; cheeks very 
narrow and compressed, ending in short, blunt spines; margin of 
head striated longitudinally ; eyes very minutely faceted; thoracic 
