134 CRUSTACEA. 



spine subacute, posterior margin entire, medial region with three 

 tubercles, cardiac region with a single tubercle. Hand stout, fin- 

 gers very Avidely apart except at tips, moveable finger with a single 

 tooth near base ; penult joint of eight posterior feet subcylindrical. 



Plate 6, fig. 3 a, male, enlarged two diameters; b, side view of beak, 

 ibid.; c, abdomen, ibid. 



Sandwich Islands (Oahu or Maui). 



Length, nine and a half lines; greatest breadth, six lines; part pos- 

 terior to cardiac tubercle, about one-fourth as long as part anterior to 

 the same. The absence of all teeth or spines on the sides, and the 

 nearly straight line from the tip of the beak to the cardiac lateral 

 spine, mark at once this species. The beak, or part anterior to the 

 eyes, is longer than one-fourth the whole length of carapax. In a 

 lateral view, the sides of the beak are seen to be excavate from just 

 anterior to the eyes, and the front margin is rounded and entire. 



H0ENIA BREVIROSTRATA. 



Feminse: Carapax lotus, paulo oblongus, breviter rostratus, utrinque 

 2-angulatus, angulis salientibus, lateribus inter angulos laterales valde 

 excavatis; superfaie carapacis breviter k-tuberculatd, rostra ad basin 

 valde angustiore quam fmns, acuto, non longiore quam latitudo trans- 

 orbitalis, dente prceorbitali vix saliente, obtuso. Manus tennis, digitis 

 versus basin paulo hiantibus, carpo imrmi; articulus pedum 8 posti- 

 corum penultimus subcylindricus. 



Female: Carapax broad (a little longer than breadth), brevirostrate, 

 two-angulate either side, the angles salient and separated by con- 

 cave intervals; surface of carapax with four low tubercles; beak 

 abruptly narrower than part of carapax posterior, acute and quite 

 short; praeorbital tooth, hardly salient, obtuse. Hand slender, 

 fingers towards basin somewhat separate. Carpus unarmed. Penult 

 joint of eight posterior feet subcylindrical. 



Plate 6, fig. 4 a, female, enlarged two diameters ; b, side view of 

 anterior portion, ibid. ; c, extremity of abdomen, ibid. 



