M A I I D E A. 



97 



post-orbitalibus omnino integris nunquam constrictis, cornubus rostri 

 ovatis, acutis, rnargine pubescentibus et subtiliter erosis. Pedes 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 MITHRACIRZE. 

 Mithrax ASPER {Milne Edwards). 



Rostrum usque ad diametrum orbitalem dwisum, cormibus bilobatis, 

 diver gentibus ; carapace pubescente, gramdoso, super jicie plerumque 

 inermi, tubercidis parvulis paucis ornatd; marginibus lateralibus valde 

 7-spinoso-dentatis, dentibus duobus posticis minoribus et sub-dorsalibus. 

 Ped.es antici mediocres, bracliio carpoque spinulosis; 8 postici apice 

 articuli tertii wii-spinigeri. Antenna externw interdum sub rostro 

 partim celatw, articulis 2do §tioque subo3quis. Mar go orbitalis infe- 

 rior unidentatus. Regio pterygostomiana rnargine spinidosa. 



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

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



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