514 B. N. PEACH ON FURTHER RESEARCHES AMONG THE 
incurved horns much beyond the middle line of posterior margin. Cervica 
groove deep. Carapace ridged into three longitudinal crests, besides the 
thickened margins, all tuberculated. Abdomen short, composed of six narrow 
highly faceted segments with pointed recurved pleure. Telson wide at base, 
suddenly narrowing, expanding into a rounded and fimbriated termination and 
supporting two flattened lobes at narrowed part. Swimmerets of tail ovate 
and directed inwards, so that tail is broader at base than extremity. Body 
much depressed, so that fossils belonging to this genus are invariably exposed 
“back up.” Test of considerable consistence. 
Pseudo-Galathea rotunda, nov. sp., Pl. XXVIII. figs. 6-6a. 
Small species nearly as broad as long. Length, including rostrum and telson, 
2 cm., of which the abdomen only makes up 8 mm. Breadth across widest 
part of carapace 1°4 cm. 
Carapace: almost discoid, produced anteriorly into short rostrum and 
posteriorly into horn-like processes, so that the posterior margin is deeply 
concave. A deep cervical groove proceeds from near the antero-lateral angles, 
and passes backwards to near the mid line of the back, dividing off the 
carapace into two unequal areas. Three lines of ridging, one mesial and 
two lateral, traverse both areas, being gapped only by the cervical groove. 
These hear numerous tuberculations, as in P. Macconochii, while the thickened 
lateral margins only bear small tubercles, and are further ornamented by lon- 
gitudinal lines. Cephalic appendages, as in P. Macconochii, consist of large 
eyes, antennules with broad conical two or three jointed propodites, supporting 
double short tapering many-jointed set, and antenne made up of long-jointed 
lashes very thick at base. The nature of the propodite not observed. No 
basal scale seen. None of the other cephalo-thoracic appendages observed. 
Abdomen short and narrow between the horns of carapace, and suddenly 
expanding beyond it, made up of six well-faceted very small terga, which give 
off small-pointed pleurze directed back at a considerable angle from the line of 
the tergum. The telson is broad at base, tapers very suddenly, and again 
expands into a fimbriated lobe, and supports a small lobe on each side. The 
appendages of sixth segment in the form of two flattened elongated swimmerets, 
on each side supported on single propodites. These are usually found in the 
fossil state with the points directed inwards. 
Locality.—River Esk, 4 miles south of Langholm. 
Horizon.—Calciferous Sandstone Series. 
Collector.—A. MAcCONOCHIE. 
ie min i oe be i 
