CRUSTACEA. 33 



1. GONATCHNTOTUS PENTAGONUS, Admits Sf White. (Tab. VI. Fig. 7.) 



Thorace supra confertim verrucoso, verracis depressis ; robusta carina dorsab, ab uno laterali angulo 

 ad alterum pertinente, duobus tuberculis in medio. 



Fronte medio sulcata, medio dorsi duabus longitudinalibus impressionibus ; ultimo articulo abdominis 

 in femina verrucoso. Primo pedum pari verrucoso, digitis sulcatis. 



Hab. Oram Brunensem. 



Gonatonotus jyentagoniw, Adams and White, Proc. Zool. Soc. 



Carapace above closely verrucose, the warts depressed ; a rather strong ridge across the 

 back, extending from one lateral angle to the other, with two tubercles in the middle ; the 

 front grooved down the middle ; the centre of the back with two longitudinal impressions ; 

 terminal joint of abdomen, in the female, verrucose. 



Hab. Coast of Borneo. 



When alive, this species is of a brick-red colour, with the chela? crimson, and the under 

 surface rufous. 



4. CEKATOCARCINUS, Adams §r White. 



Thorax subpentagonalis ; latera supra insertionem cbelarum in magnam spinam paululum prorsum 

 directam producta. 



From lata et prom in ens, cornibus conicis inter se valde distantibus utrinque eminens; oculi 

 parvuli, pedunculis brevibus, sulcis in lateribus rostri aptatis. Exteriores antennae perniagnse, termi- 

 nales appendices certe dimidia longitudine antennarum, et ultra cornua rostri prominentes. 



Clielm valde elongatae; latera fere parallela, carpus subpyriformis, sine spinis in parte interiore; 

 aeies digitorum convenientes et serratse. Secundum par pedum longius et gracihus quam postrema tria 

 paria ; articulus tarsalis gracilis et elongatus ; quartum et quintum sequalia longitudine ; quintum par, ut in 

 Eumedono, tarn alte positum ut quarti paris insertionem fere celet ; tarsales articuh horum pedum crassi ; 

 unguis ad extremitatem translucidus. 



Abdomen maris ut in Eumedono : femina incognita. 



Hab. Maria Orientalia. 



Carapace somewhat pentagonal ; the sides, over the insertion of the first pair of legs, 

 produced into a large spine directed slightly forwards. 



Front wide and prominent, projecting on each side in the form of conical horns, widely 

 separate from each other. Eyes rather small, peduncles short, the eye fitting into a groove 

 on the side of the front ; outer antennas considerably developed, the terminal appendages at 

 least half the length of the whole antenna?, and projecting beyond the horns of the front. 



First pair of legs much elongated, the sides nearly parallel, the wrist somewhat pear- 

 shaped, without spines on the inside, the edges of the pincers meeting and serrated. Second 

 pah of legs longer and more slender than the last three pairs ; the tarsal joint slender and 

 elongated ; fourth and fifth pairs of legs of equal length ; the fifth pair, as in Fumedonm, 

 placed so high as nearly to conceal the insertion of the fourth pah ; the tarsal joints of these 

 legs thick ; the claw at the end translucent. 



K 



