420 CRUSTACEA. 



is nearly acute in front and truncate behind. Outer antenna some- 

 what longer than the body, flagella nearly naked. 



b. Carapax tomenfosus ant pubescent, et non nudus. [From f< re triloba**.] 

 PORCELLANA TOMENTOSA. 



Carapax pedesque sparsim tomentosi Carapax panic tfkmgu*, paulo 

 pone oculos spina Jateraliter in sir actus , f route subito angmtwre quam 

 latitude interoroitalis, eoque trilobato, lobo mediano triangulato, ro- 

 tundato, externa redangidato obtuso ; superfieie carapctcis anterhis 

 colliculo transverse utrinque notatd, regione mcdiand postice circum- 

 scripta. Pedes antiei parti, carpo oblongo, into* acute tenuiterque 

 i-5-dentato; manu elongate triangalatd, valde depressd. 



Carapax and feet sparsely tomentose. Carapax oblong, having a 

 short spine a short distance behind the eyes; front abruptly nar- 

 rower than interorbital breadth, and hence trilobate, median lobe 

 triangular, rounded, the outer rectangular, and not projecting for- 

 ward, obtuse; surface of carapax having a transverse prominence 

 either side of median line, just posterior to line of orbits, median 

 region circumscribed behind. Anterior feet small ; carpus oblong, 

 and having four or five slender acute teeth on inner margin ; hand 

 long triangular, and very thin. 



Plate 26, fig. 10, animal, enlarged two diameters. 



Raraka Island, Paumotu Archipelago. 



Length of carapax, 3'2 lines; breadth, 2*7 lines. From the lateral 

 spine of the carapax a depression passes inward and backward, and 

 a connecting line forms at middle the posterior limit of the median 

 region. The hands are about as long as the breadth of the carapax. 

 and very thin. The orbit makes a semicircular depression in the 

 margin of the carapax. Of the five teeth of the carpus in our speci- 

 men, the middle one is much smaller than the others, and the fifth is 

 next smallest; there are six teeth, counting the one at the apex on 

 the same margin. 



