CRUSTACEA. 



.nine subacute, posterior margin entire, medial region with three 

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

 ders very widely apart except at tips, moveable finger with a single 

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



Plate G, fig. 3 a, male, enlarged two diameters; b 7 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. 



HUENIA BREVIROSTRATA. 



Feminaa :— Carapax latus, pernio oblongus, breviter rostratus, utrinque 

 2-angulatus, angulis saMentibus, lateralis inter angulos la Urates valde 

 excavatis; superficie carapacis breviter i-iuberculatd, rostro ad basin 

 valde angustiore quam frons, acuta, nan longwre qiiam latitudo tram- 

 orbitalis, dente prmorbitali vix salknte, obtttso. Manas tenuis, digitis 

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

 corum penultimus subeylindricus. 



Female: — Carapax broad (a little longer than breadth), brevi rostrate, 

 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; prseorbital 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. 



