288 ` MR. BELL, HORÆ CARCINOLOGICÆ ; 
LEUCOSIA BREVIMANA, mihi (Tas. XXX. fig. 7). Testà subrhomboidali, fronte emar- . 
ginato, margine laterali vix granulato; manibus æquè longis ac latis, interne sub- 
carinatis, lzevibus. 
Hab. ad insulas Philippinas. Mus. Bell. | 
Carapace somewhat rhomboidal, rounded behind ; front rather prominent, slightly emar- 
ginate; lateral margin scarcely granulated; thoracic sinus deep, narrow, extending back 
to the posterior part of the branchial region, its inferior boundary granulated, and con- 
tinued into the posterior margin. External foot-jaws with the stalk longitudinally convex. 
Arms with the upper side bordered by a row of large tubercles on each side, and an inter- 
mediate one, consisting of not more than three or four at the base, the inner side present- 
ing à smooth triangular area bounded by large tubercles; wrists smooth, short and 
small; hands as broad as long, smooth, slightly carinated on the inner side; fingers as 
long as the hand, the moveable one rather the longer. Abdomen (female) broad oval, the 
first and second joints with a broad carina in the middle. 
Colour brownish-grey. . 
Length of carapace 0*8 in. 
Brought from the Philippines by Mr. Cuming. 
Distinguished from most other species by the absence of conspicuous granulations on 
the lateral margin of the carapace, by the equal length and breadth of the hands, and by 
the paucity of tubercles at the base of the arm. — | 
À single female specimen is in my collection. 
/ 
LEUCOSIA MARGARITACEA, mihi (Tas. XXX. fig. 8). Testa multó longiore quam latiore, 
kevissimá, margaritaceà; sinu thoracico margine levi; brachiis suprà tuberculis 
albis, rubro cinctis. — | j 
Hab. in Oceano orientali. Mus. Brit. 
Carapace about one-fifth longer than it is broad, somewhat rhomboidal (much resem- 
bling L. punctata and affinis in general form), extremely smooth and polished, and of à 
pearly lustre; front prominent, obtuse ; thoracie sinus short, deep, with the margins not 
granulated; pedipalps and sternum smooth; arms covered, excepting at the distal extre- 
mity, with large granulations, which are ocellated, being white in the centre, surrounded | 
by a red ring; wrist rounded, and wholly smooth; hands longer than they are broad, 
a ie only along the inner margin. Abdomen similar to that in L. punctata and 
18. | 
Length of the carapace 0-7 in. | 
A single specimen, probably from the Indian Ocean, is in the British Museum. 
This species exceedingly resembles Z. punctata and affinis. From the former it may 
be at once distinguished by the absence of all punctures on the surface of the carapace, - 
and from both by the absence of granulations on the margins of the thoracic sinus, and : 
by the red and white ocellated tubercles on the arm. The pearly glance on the whole | 
surface of the carapace is peculiar to this speci | 
cies, and d nan 
change from external causes. pe and appears not to depend upon any 
