54 ZOOLOGY OF THE VOYAGE OE H.M.S. SAMAKANG. 



1. LEUCOSIA, Fabricius. 



1. LEUCOSIA HCEMATOSTICTA, Adams 8f White. (Tab. XII. Kg. 2.) 



Thorace trapezoidali supra valde convexo, post angulum latero-anteriorem inscissura, profunda, maculis 

 multis sanguineis rotundatis obsito. 

 Hab. Maria Orientalia. 



Carapace trapezoidal, very convex, of a light yellow, covered with numerous small 

 round blood-red spots, fewer posteriorly, and in the middle line a deep notch behind the 

 latero-anterior angle. 



Front obtuse. 



Fore-legs with round, scattered, blood-red spots, and a large quadrate mark of the same 

 colour on the outer surface of each claw. 



Hind-legs with a blood-red band on the upper half of each joint. 



Hab. Eastern Seas. 



2. OREOPHORUS, Euppell. 



1. OREOPHOBUS BETICULATUS, Adams $ White. (Tab. VI. Eig. 1.) 



Thorace subtrigono, reticulato, fossis subdivisis duabus latero-anterioribus, postice fossa profunda, in 

 medio tuberculo clypeoformi, regionibus lateralibus valde elevatis. 

 Fronte rotundata, antice subernarginata supra exsculpta. 

 Chelis reticulatis. 

 Hab. Maria Orientalia. 



Carapace subtrigonal, covered with a net-work of beaded lines, the intermediate areas 

 finely granulated ; a long semilunar, irregularly-shaped cavity extending along the latero- 

 anterior margin on each side, separated by a strong post-frontal septum, each lateral cavity 

 divided in two portions by two over-arching processes, which unite above, leaving a round 

 foramen of communication ; the posterior sublongitudinal portion partially divided by a 

 conical projecting process ; a small hole in the floor of the hind portion of the latero-anterior 

 fossa ; a cavity at the hind part of carapace nearly divided in two by a granulated tongue- 

 shaped tubercle, and bounded posteriorly by two-obtuse tubercles of the hind margin ; a solid 

 shield-shaped reticulated process arising out of the hind part of the cavity ; a beaded line 

 around the margins of both fossae ; lateral regions convex, elevated into large obtuse promi- 

 nences ; lateral edges coarsely tuberculated. 



Front thick and rounded, slightly emarginate, rather deeply excavated on the upper 

 surface. 



Fore-legs covered with coarse reticulations, formed of granulated lines. Upper claw 

 spatulate, slightly curved downwards, flattened above, narrow beneath, a row of pits on the 

 outer and inner margins, under edge tuberculiferous ; upper surface with several rows of 

 beaded lines. Under claw horizontally inclined, slightly curved upwards, elongately conical ; 



