526 CRUSTACEA. 



ASTACOIDES NOBILIS. 



* 



Rostrum sat longum,fere integrum, apice obtusum, utrinque obsolete uni- 

 dentotum, basi antennarum externarum puulo brevius. Carapax 

 lateraliter infra rostri basin obsolete utrinque armatus. Abdominis 

 segmenta utrinque paulo uni-tuberculata, junioris tuberculis obsolescen- 

 tibus ; segmentum 2dum prope marginem lateralem spinis brecibus ar- 

 matum; segmentum caudale jxiulo oblongum. Pedes antici cequi, crassi. 

 carpo intus elongate trispinoso, manu infra supraque marginatd et 

 breviter dentatd, superftcie fere Icevi, nudd. Epistomatis processus 

 medianus anticus triangulatus et elongatus, et perangustus. 



Beak rather long, nearly entire, apex obtuse, and either side having 

 an obsolete tooth, a little shorter than base of outer antennae. 

 Carapax obsoletely armed on either side below base of beak. Seg- 

 ments of abdomen more or less distinctly uni-tuberculate, the 

 tubercles on younger individuals obsolescent ; second segment 

 with short spines near lateral margin ; caudal segment a little 

 oblong. Anterior feet equal, stout, carpus very prominently three- 

 spinous, hand above and below with a prominent margin, which is 

 short dentate, surface nearly smooth, naked. Anterior median pro- 

 cess of epistome triangular, very narrow and elongate. 



Plate 33, fig. 3 a, animal, natural size ; b, anterior part of epistome, 

 with base of outer antennae either side. 



New South Wales ? 



Length of body to extremity of beak, five inches. In a younger 

 specimen, three inches long, the segments of the abdomen have but a 

 faint tubercle on upper surface either side, while in the large one, the 

 same surface is quite prominent in a transverse line somewhat oblique, 

 and there is a more prominent point constituting the tubercle. 

 The anterior triangular part of the epistome is quite oblong in the 

 large specimen, and but little so in the smaller; it projects in both 

 nearly to apex of second basal joint. In both, the base of the outer 

 antennae is close alongside of this part of the epistome, and beneath 

 the other pair of antennae. The head is narrow, and the epistome, in 



