400 MR B. N. PEACH ON SOME 
specimens collected by J. BENNtn, Fossil Collector to the Survey. The first and 
best specimen (fig. 8), was obtained from the Coal-measures at Blair Point, 
near Dysart. The others, with one exception, were obtained by him from the 
Calciferous Sandstone series from Redhall and Cramond, in the vicinity of Edin- 
burgh. The specimen from which figs. f and g were taken was got by Mr THomas 
JARDINE from Redhall, during one of Professor GEIK1z’s class excursions. 
This species has been purposely described first because the carapace and 
eyes have been found together in the same specimen with the comb-like organs. 
It will be necessary to refer to this again when the genera Hoscorpius and 
Mazonia of Meek and Worthen come to be discussed. 
Eoscorpius glaber, n. sp. (Plate XXII. figs. 2 to 2/). 
Body, without the tail and appendages, about 13 inches long. 
Cephalo-thorax.—The inner surface of portions of the carapace only is seen. 
It appears to be smooth and not tuberculated. Eyes not observed. Falces: a 
pair of stout chelicere, having the biting edges denticulated. Palpi cheliform, 
the biting portions being remarkably long compared with the rest of the limb. 
The basal joints of the palpi are strongly tuberculated and act as jaws. Walking 
limbs: four on each side, the foremost being short and directed forwards, the 
next even shorter, and the last two pairs being much longer than the rest and 
directed backwards, the hindermost being the longest, though they do not extend 
beyond the fifth abdominal segment. The basal joints or the coxee of these 
limbs in their present flattened state appear as triangular plates, which converge 
upon the thorax, those of the first pair probably acting with the palpi as maxillz. 
The other three almost meet near the middle line, and enclose some small 
plates, the number and arrangement of which are not shown. The second joints 
are short and subquadrate, the third joints are longer and flattened laterally ; 
the fifth short, with the under margin gibbous, making it easily recognisable. 
The tarsi are each composed of one joint, somewhat narrower at the base than 
the extremity (which is the case with all the limb joints) where it is produced 
beneath into a strong spine. The manus is supplied with a stout fixed spine and 
two movable hooks, which do not seem to be toothed on their lower margins. 
The abdomen, exclusive of tail, consists of seven segments, the dorsal por- 
tions of which are represented by seven subovate plates, the front ones being 
not so deep as those farther back. The first six are all of nearly equal breadth. 
The seventh narrows so suddenly that its posterior margin is only half the 
breadth of the anterior one, which is as broad as the posterior margin of 
the sixth segment. All the segments have a broad marginal band in front. 
Five ventral plates are visible, each corresponding in shape and breadth to 
the dorsal plate from the third to the seventh segment inclusive, except the 
foremost which is much deeper. Slit-like spiracles, surrounded with a raised 
