CRUSTACEA. 
33 
1. GONATOAOTUS PENTAGONUS, Adam White. (Tab. VI. Pig. 7.) 
Thorace supra confertim verrucoso, verrucis depressis ; robust^ carina dorsali, ab uno laterab angulo 
ad alterum pertinente, duobus tuberculis in medio. 
Fronte medio sulcata, medio dorsi duabus longitudinalibus impressionibus ; ultimo articulo abdominis 
in feminfi verrucoso. Primo pedum pari verrucoso, digitis sulcatis. 
Hab. Oram Brunensem. 
Gonatonotus pentagons, 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 chelae crimson, and the under 
surface rufous. 
4. CERATOCARCINUS, Adams 8f White. 
Thorax subpentagonalis ; latera supra insertionem chelarum in magnam spinam paululum prorsum 
directam producta. 
Frons lata et prominens, cornibus conicis inter se valde distantibus utrinque eminens ; oculi 
parvuli, pedunculis brcvibus, sulcis in lateribus rostri aptatis. Exteriores antennae permagnae, termi- 
nales appendices certe dimidia longitudine antennarum, et ultra cornua rostri prominentes. 
Chela valde elongatae; latera fere parallela, carpus subpyriformis, sine spinis in parte interiore; 
acies digitorum convenientes et serratae. Secundum par pedum longius et gracilius quam postrema tna 
paria ; articulus-tarsalis gracilis et elongatus ; quartum et quintum fequalia longitudine ; quintum par, ut m 
Eumedono, tarn alte positum ut quarti paris insertionem fere celet ; tarsales articuli horiun 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 antennae considerably developed, the terminal appendages at 
least half the length of the whole antennae, 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 
pair 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 Fumedonus, 
placed so high as nearly to conceal the insertion of the fourth pair ; the tarsal joints of these 
legs thick ; the claw at the end translucent. 
K 
