neio Decapod Crustacea. -io.j 



\uQ\n'\ci\), strongly genicuhited at a right angle at the third 

 segment. Kostruin sliMuler, ari.siiig with ol>tuse crest at one 

 third of the cjirapaco from its anterior bonier, the free part 

 once and a lialf as lon^ as the remainder ot" the carapace; 

 gently ascending; from the anfeiior tooth of the upper mar^^in, 

 it just reaches beyond the scale?. Up|)er margin with five, 

 rarely fonr teeth, two on the carapace ; terminal half of xipper 

 margin devoid of teeth. Lower lin)b shallow, convex, as in 

 Sjuront. unala.s/censiSf Rathb., and Sja'ront. tridens, Rathb., 

 width of the rostrum at base of lower margin one eighth to 

 one seventh of its whole length ; lower limb gradually 

 diminishing anteriorly, armed with six, seven, or eight, rarely 

 nine teeth. 



No supraorbital spine ; autennal spine moderate, no pterygo- 

 stomian spine. 



Tliird segment of abdomen produced posteriorly into a some- 

 what compressed hump, that is bent at a right though rounded 

 angle; fouith segment rounded at the postero-lateral an-'lc, 

 but the Ht'th terminating in a sharp tooth; sixth segment 

 twice as long as broad. Telson little longer than sixth 

 segment, upper surface carrying four, rarely five, pairs of 

 spinules. 



Styloceiite reaching to the distal end of first joint of an- 

 tennular peduncle ; thickened portion of outer fiagellum 

 leaching somewhat beyond the middle of antennal scale. 

 Antennal scale a little longer than carapace, exclusive of the 

 lostrum, slender, SIS. times as long as broad, hardly narrowiii"- 

 distally; distal spine not nearly so advanced as the mem- 

 branous portion. 



External maxillipedes reaching to only one third of tiie 

 scales ami w ithout exopodite. 



Legs of first pair reaching with their fingers beyond basal 

 joint of outer antt-niifs, those of second pair to the middle of 

 the scales. Carpus 7-articulate, the sixth joint, just half as 

 long as the last, the shortest, the third the longest. 



Following legs slender, e. g., the meropodites of the ante- 

 penultimate pair ten times as long as broad ; dactyli one third 

 the length of the propodites. 



Lcngtii of the largt-st of twelve specimens 3i mm. 



Inland ^^ea of Japan. 



Pala-mon {Parapalcemon?) Ilendersoni, sp. n. 



Related to /'<//. altifrons, Ilend., from Delhi and Laliore, 

 to Pal. scabriculus, Heller, from Ceylon, and to Pal. lati- 

 manus, v. ^lart., from the Lidian Archipelago. 



