288 MR. BELL, HOILE CARCINOLOGIC^E ; 



Leucosia brevimana, milii (Tab. XXX. fig. 7). Testa subrhomboidali, fronte emar- 

 ginato, margine laterali vix granulato ; manibus seque longis ac latis, interne sub- 

 carinatis, lsevibus. 

 Hab. ad insulas Philippinas. Mus. Bell. 



Carapace somewhat rhomboidal, rounded behind ; front ratber 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 a 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. 



A single female specimen is in my collection. 



Leucosia margaritacea, mihi (Tab. XXX. fig. 8). Testa multo longiore quam latiore, 

 lsevissima, margaritacea; sinu thoracico margine hevi; brachiis supra tuberculis 

 albis, rubro cinctis. 

 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 a 

 pearly lustre ; front prominent, obtuse ; thoracic 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, 

 granulated only along the inner margin. Abdomen similar to that in L. punctata and 

 affinis. 



Length of the carapace 07 in. 



A single specimen, probably from the Indian Ocean, is in the British Museum. 



This species exceedingly resembles L. 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 species, and appears not to depend upon any 

 change from external causes. 



