82 B. N. PEACH ON SOME NEW CRUSTACEANS FROM THE 
fossilized sideways the limbs are not crushed up into the body, and are more 
likely to be preserved in a state fit for studying (figs. 5a, b, and c). This also 
applies to all the other species. 
I have named this species after my friend Ramsay H. Traquarr, M.D., who 
is describing the fishes got from the same beds with the above, and who has 
handed over to the Survey such Crustaceans as he has been enabled to collect 
during his visits to that locality. 
Anthrapalemon Macconochii, R. Etheridge, Jun; Antrapalemon Macconochii, 
Quart. Journ. Geolog. Soc., 1879, vol. xxxv. p. 471, pl. 23, fig. 10, Pl. VIII. 
figs. 6 to 6d. 
The description of the carapace of this species (all of it then known) by 
R. ETHERIDGE, Jun., is so complete that it is unnecessary to add to it. Two 
specimens have recently come to light among those since collected by Mr 
Macconocuigz which exhibit some of the cephalic appendages as well as the 
body segments and telson in place. The study of these entirely confirms 
Mr ErTHERIDGE’S opinion that the carapace he described belonged to a 
macrurous decapod. 
Cephalic Appendages.—The eyes are large and stalked, and placed on each 
side of the rostrum. The antennules consist of two pairs of short conical many- 
jointed sets, each pair supported upon a single peduncle, two joints of which 
appear beyond the apex of the rostrum. The antennz are composed of broad 
peduncles, each of which supports a lash whichis many-ringed. These are very 
thick at the base when the size of the animal is taken into consideration. No 
basal scale observed. 
The abdomen is short compared with the carapace, and made up of six 
segments, the anterior ones being the narrower. The posterior angles of the cara- 
pace project backwards and inwards like horns, and overlap as far as the ante- 
rior margin of the fifth segment, so that all those so confined are necessarily 
narrow. The sixth expands considerably beyond the tips of the horns, and 
supports a joint on either side, to each of which are articulated a pair of broad, 
rounded, and flattened swimming flaps. 
The telson is broad where articulated with the sixth segment, whence it 
tapers rapidly for a little over half its length, and then expands once more into 
a rounded and fimbriated flap. At the narrowest part it has articulated with 
it on each side a pair of small flaps, so that the tail, made up of all the above 
elements, is a most effective paddle. 
Observations.—The tail greatly resembles that of A. gracilis, Meek and Wor- 
then,* but the carapace is sufficient to distinguish it from that species at a glance. 
Locality —Tweeden Burn, Newcastleton, Liddesdale. 
Horizon.—Cement-stone group, Calciferous Sandstone series. 
* Proceedings, Acad. Nat. Science, Philad., May 1865, p. 80. 
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