MAIOIDEA. 97 



post-orbitalibus omnino integris nunquam constrictis, cornubus rostri 

 ovatis, acutis, margine pubescentibus et subtiliter erosis. Psdes antici 

 pertenues; 8 postici marginibus hirsuti, articulo quinto vix duplo 

 longiore quam latiore. 



Pubescent, unarmed, depressed, subpyriform, breadth just behind the 

 eyes much greater than half the greatest breadth ; margin of cara- 

 pax behind the eyes entire, without any constriction ; horns of 

 rostrum ovate, acute, pubescent, and irregularly denticulate or 

 uneven at margin. Anterior feet very slender; posterior eight with 

 the two opposite margins very hairy, fifth joint scarcely twice as 

 long as broad. 



Plate 2, fig. 3 a, animal, enlarged. 



Feejee Islands or Tongatabu ; there is some uncertainty as to 

 which of these neighbouring groups afforded the specimen. 



Length, one-fourth of an inch. The eight posterior legs are sub- 

 equal, and the tarsus is naked or nearly so. The fingers of the hand 

 are tapering and acute, and the hand narrows towards its extremity. 



SUBFAMILY MITHRACINJE. 

 MITHEAX ASPER (Milne Edwards). 



Rostrum usque ad diametrum orbitalem divisum, carnubus bilobatis, 

 divergentibus ; carapace pubescente, granuloso, super fide plerumque 

 inermi, tuberculis parmdls paucis ornatd; marginibus lateralibus valde 

 7-spinoso-dentatis, dentibus duobus posticis min&ribus et sub-dwsalibus. 

 Pedes antici mediocres, bracliio carpoque spinulosis; 8 postici apice 

 articuli tertii uni-spinigeri. Antennce externce interdum sub rostro 

 partim celatce, articulw 2do ?>tioque subcequis. Margo orbitalis infe- 

 rior unidentatus. Regio pterygostomiana margine spimdosa. 



Rostrum divided to orbital line, horns divergent, deeply two-lobed 

 at apex ; carapax pubescent, granulous, mostly unarmed with spines, 



25 



