Dr. Strahl on new Thalassinee from the Philippines, 387 
but the brachium is smooth, slender, and destitute of hooks at 
its inferior sharp margin. The fingers are acute, about as long 
as the hand, which is nowhere granular or tubercular, ‘The 
margin of the fingers is finely denticulated at the base. 
Axzius plectrorhynchus, n. sp. 
The only species of this genus hitherto known, Avius sti- 
rhynchus, is European: the species now to be described has been 
sent from Luzon by M. Jagor: it is represented, unfortunately, 
only by a single female specimen ; but this is sexually mature, 
It measures about 9 lines in length. 
The cephalothorax is laterally compressed and quite unarmed; 
it has posteriorly an emargination for the reception of the abdo- 
men; on each side of this emargination there is a small process 
for the reception of the articulation of the first abdominal seg- 
ment ; the frontal rostrum, which is not laterally compressed, is 
not acute, but terminates in two small points, which lie close 
together side by side, and are a little turned up in front; the 
two lateral margins of this process, which gradually approach an- 
teriorly, are each armed with four similar, small, slightly turned- 
up points (the apical points being included). On each side, near 
the frontal process, there is a similar spine, which projects in the 
middle above the eye-peduncle. In the middle of the base of 
the frontal process, at the commencement of the stomachal re- 
gion, there stands another equally small and similarly formed 
spine; so that the forehead bears eleven spines in all, 
The eye-peduncles are cylindrical and but small, not reaching 
quite to the apex of the frontal rostrum; a little before the 
commencement of the cornea they are somewhat constricted, 
and then swell out again into a globular form, as in Gebia 
hittoralis. 
The inner antenne are cylindrical, and have two flagella ; 
the junction of the second and third joints reaches to the apex 
of the rostrum; the first jomt is the longest, as long as the 
second and third together. The anterior extremities of the joints 
are beset with a few hairs, The two flagella are nearly of equal 
length, about half as long as the carapace. The external antenna 
has only one flagellum, which is about as long as the carapace. 
The tuberculum is placed about in the middle of its proper 
piece. The first antennal joint is the shortest of the three; it 
bears a spine on the inside in front, and reaches as far forwards 
as the piece which lies on the outside of it, the armiger, which 
emits forwards and outwards, near the second joint of the an- 
tenna, two horizontal approximated points, of which the inner 
may perhaps be the scale: from the smallness of the object, and 
the necessity of handling the unique specimen with care, I found 
