CRUSTACEA AND ARACHNIDA OF THE CARBONIFEROUS ROCKS. 515 
Pseudo-Galathea ornatissima, mihi, Pl. XX VIII. figs. 7-70. 
Anthrupalemon ornatissimus, ante p. 83, Pl. XXVIII. fig. 7. 
The description of this species was obtained from two fragments of carapaces, 
the anterior portions of which were only visible. From what I saw I presumed 
they were nearly allied to P. Macconochii, and several specimens have been 
recently added to the Survey Collection, and these fully bear out the surmise. 
The carapaces are much more elongated than in the P. rotunda, and are in most 
respects like those of P. Macconochii, save that the ridges, instead of bearing a 
single row of large bosses, each carry several rows of minute tuberculations. 
Eyes and antennules much as in P. Macconochit. No basal scale to antennse 
observed. The abdomen is intermediate in length between that of the other 
two species, while the tail is much as in P. Macconochiz. 
As no basal scale has been observed attached to the antenne of any species 
of this genus, there is a strong presumption that it never existed, for in those 
of the carboniferous decapods, which are known to bear it, that part is oftener 
preserved than the more fragile lash. In this character, and the general 
arrangement of the tails, these species are similar to Anthrapalemon gracilis of 
Meek and Worthen, though the posterior angles of the carapace of their species 
are rounded off, and not produced backwards as in ours. 
Genus Paleocrangon, Salter, 1861. 
Paleocrangon elegans, nov. sp., Pl. XXVIII. figs. 8-8a. 
A very graceful shrimp-like form, 2-3 cm. in length. 
In most respects this species resembles the P. Eskdalensis, but differs from 
it in its more elongated form, and in the pleuree of the second abdominal somite, 
which are not so much enlarged, nor do they extend so far forwards. The 
tergum of the last thoracic somite is not covered by the carapace. 
This species occurs sparingly at Langholm along with P. Eskdalensis, but at 
Pathhead Mill, near Dunse, Berwickshire, whole shoals of it are found em- 
bedded in the same slab. 
Horizon.—Calciferous Sandstone Series. 
Collector.—A. MAccONOCHIE. 
Genus Paleocaris, Meek and Worthen, 1865. 
Paleocaris Scoticus, mihi, ante. 
A further contingent of these pretty little fossils from Langholm shows 
that the eyes were supported on long movable stalks much as in the recent 
Mysis. One or two specimens show them as bent off at right angles to the 
direction of the body. This fact, coupled with the arrangements of the 
