146 M. T. C. Winkler on 
nize in the specimens described representatives of the species 
named Glyphea pseudoscyllarus, Schl., Oppel. 
Most of the examples are adult animals; but among them 
are two which are undoubtedly young individuals. It is, 
according to M. Oppel, upon such non-adult individuals of 
Glyphea pseudoscyllarus that von Minster established his 
genus Dubima. 
V. On Areosternus Wieneckei, De Man. 
In order to be able to compare the fossil genus Glyphea 
with the recent genus Araosternus, it is necessary in the first 
place to give a short summary of the peculiarities of the latter. 
We must run through the description of the single species of 
this genus, inserted by Dr. J. G. De Man in the periodical 
work entitled ‘ Notes from the Leyden Museum,’ vol. iii. M. 
De Man says :— 
This new and very interesting form, to which I propose 
to give the name of Arcosternus, in consequence of its narrow 
sternum, belongs without any doubt to the family Loricata 
(Scyllarides, Palinurides). By its generic characters it is a 
very near ally of the genus Falinurus, Fab., the “Palinurt 
communes” of Milne-Edwards; but it differs therefrom so 
remarkably by the structure of the cephalothorax and the 
form of the front and the sternum, that it must represent a 
new subtamily, equal in value to the Scyllarides and the Pali- 
nurides. The family Loricata must therefore be divided 
into three subfamilies, the Scyllarides, Palinurides, and 
Areosternides, the last being characterized by the rectan- 
gular and narrow sternum and by the structure of the cara- 
pace, which is elongated, subcylindrical, and covered with 
hairs, without spines. 
The single specimen, a male, was given to Dr. Wienecke 
when he visited the Isle of Rats, near Bencoolen, in Sumatra. 
The person who presented it to the above-mentioned traveller 
said that he had found the animal in the sea. 
The specitic characters of Araosternus Wienecket are as 
follows :—The ‘cephalothorax is of an elongate rectangular 
form ; its greatest breadth, a little behind the cervical furrow 
is, in proportion to its length, as 5 to 8; the cervical groove 
is situated a little behind the middle; the lateral portions of 
this groove are directed downward and forward towards the 
anterior part of the antennary sternum ; the branchial grooves 
are very shallow; in front of and parallel to the semilunar 
posterior margin of the upper surface of the cephalothorax 
there is a very deep groove. 
The front is separated from the outer angles of the carapace 
by two deep triangular incisions, in which the eyes are situa- 
