MONOGRAPH OF THE LEUCOSIADJE. 301 
opening a little expanding forwards. Anterior legs in the male robust, rather more than 
twice the length of the carapace; the arm cylindrical, entirely smooth ; the wrist and 
hand smooth and polished; the latter somewhat tumid; the fingers as long as the hand, 
longitudinally grooved, armed with tubercles on the opposing edges, with a hiatus at 
their base. The anterior legs of the female much shorter and smaller than in the male. 
The remaining feet quite smooth and polished, the penultimate joint flattened, and with 
sharp edges; the nail long and styliform. Abdomen in the male with the first two 
segments waved, the third, fourth, fifth and sixth united, and forming, with the seventh, 
an elongated triangle somewhat hastate at the base, where there are two large elevations, 
and there is a broad groove along the centre. In the female the second to the sixth joints 
are united, forming a large, very convex shield, and the seventh joint, which is very 
narrow, is produced almost to the edge of the buccal orifice. 
— Colour brown, with several small yellower spots placed symmetrically, four of which 
are constant, and occupy the same situation as those which so distinctly characterize 
Leucosia, and which do not, I believe, exist in any others of the family. 
Length of carapace 0°9 in. i 
I have received a large number of this interesting species from Port Adelaide in South 
Australia. The males and females were nearly equal in number. It may be at once 
distinguished from every other hitherto known, by the absence of all appearance of granu- 
lations on every part of the body, and even on the arms. There are also some specimens 
in the British Museum, from Van Diemen’s Land, which differ from mine only in the 
less degree of prominence of the tubercles on the male abdomen. 
PurLyra Avansıı, mihi (Tas. XXXIII. fig. 1). Testå glabra, regionibus partìm et 
line longitudinali granulatis; margine posteriore utrinque bituberculato, 
Hab. —? Mus. Brit. | 
The carapace of this little species is depressed, glabrous, with a granulated longitudinal 
line and patches upon several of the regions, which are separated by shallow sulei; front 
emarginate, posterior margin with two or three small tubercles on each side. External 
edi i i i i length of 
dipalos with the palp not much dilated. Anterior legs more than twice the 
‘id ape ae tuberculated above and below; a line of small granules 
a slight external and internal carina granulated ; 
by the union of the second, 
the carapace; arm subttiedrous, 
on the outer side of the wrist; hand with i 
fingers sulcated. Male abdomen composed of four pieces, 
third and fourth and of the fifth and sixth segments. 
Length of carapace 0°4 in. > 
Obtained during the voyage of the Samarang, by Mr. Adams, after which indefatigable 
and intelligent naturalist I have named the species. | 
PuiLYRA PUNCTATA, mihi (Tas. XXXII. fig. 2). Testa orbiculari, levi, punctatà ; 
angulo pterygostomiano obsoleto ; brachiis triquetris. 
Hab. ad oras Africe occidentalis. Mus. Brit. 
smooth, punctate in every part; the margin distinct, with a 
2R2 | 
Carapace nearly orbicular, 
