580 CRUSTACEA. 



reaching beyond apex of arm of second pair, and much beyond apex 

 of beak. Tarsus slender and but little curved. 



Anchistia ensifrons. 



Rostrum ensiforme, valde recurvatum, squama antennali non longius, 

 apice bifidum, supra 6-7 '-dentatum, infra paulo dilatatum et 3-den- 

 tatum. Carapax super orbitafn spina, armatus, infra orbitaM spinis 

 duabus in eddem lined liorizontali. Antenna? internal rostrum parce 

 superantes. Pedes antici graciles, apicem carpi 2di non attingentes ; 

 2di crassiusculi, subcylindrici, per carpxim manumque rostrum super- 

 antes, carpo longo, apice inermi, obtuso, manu p>rcelongd, lineari, digitis 

 dimidio manus paulo bremoribus. Pedes 6 sequentes gracillimi, longi, 

 fere nudi. 



Beak ensiform, much reflexed, not longer than basal scale of outer 

 antenna?, bifid at apex, above six or seven-toothed, below somewhat 

 dilated and three-toothed. Carapax above line of orbit bearing a 

 spine, below orbit two spines in nearly same horizontal line. Inner 

 antennas extending but little beyond apex of beak. Anterior feet 

 slender, not reaching to apex of carpus of second pair. Second pair 

 rather stout, subcylindrical throughout, exceeding the beak by the 

 carpus and hand, carpus long, not armed or acute at apex, hand 

 very long linear, fingers not half as long as hand. Six following 

 pairs very slender, long, nearly naked. 



Plate 38, fig. 1 a, animal, enlarged Hve diameters; b, inner antenna? 

 and eye, more enlarged ; c, outer antenna?, ibid. ; d, d' , mandible in 

 different positions, ibid. ; e, second pair of maxillipeds, ibid. ; /, outer 

 maxilliped, ibid. ; g, extremity of leg of third or fourth pair. 



Straits of Balabac, north of Borneo. 



Length, eight to nine lines ; a female, with eggs under the abdo- 

 men, eight lines. The form of the beak and of the body is wholly 

 that of a Pala?mon. Yet the mandible has no palpus, and the inner 

 antenna? have properly but two flagella, one being only slightly bifid 

 at tip. 



