ASTACIDEA. 527 



a lateral profile view, is broad and long, and nearly vertical in direc- 

 tion. 



PAKANEPHROPS TENUICORXIS. 



Rostrum elongatum, acuminatum, ienue, loses antennarum longitudine 

 superam, utrinque k-spinosum et postering super carapacem utrinque 

 aliis spinis duabus. Pedes 8 postici gracillimi. Pedes antici longi, 

 manu vix crassiore quam carpus, margins superno biseriatim spirtoso, 

 superficiebus internd externdque uniseriatim spinosis, margine infe- 

 riore et superficie proximo, spinuli-scabris et non seriatim spinosis. 



Beak elongate, acuminate, slender, reaching beyond the bases of the 

 antennae, on either side armed with four spines, and posteriorly on 

 the carapax, other two spines. Eight posterior feet very slender. 

 Anterior pair long, hand hardly stouter than carpus, upper margin 

 with two unequal rows of spines, outer and inner surface each with 

 a single row, lower margin and surface adjoining spinuli-scabrous, 

 and not seriately spinous. 



Plate 33, fig. 4 a, animal, natural size ; b, under view of head, en- 

 larged four diameters ; c, outer maxilliped. 



Fresh-water streams of New Zealand, about the Bay of Islands. 



Length, three to four inches. Colour, olive-green to brown. Body 

 smooth ; a little hirsute on upper surface of beak. Two small spines 

 near either lateral part of transverse suture. Anterior prolongation 

 of epistome oblong triangular, acute, and distant from base of outer 

 antennae. The basal scale of outer antennae with outer apex acutely 

 prolonged ; also a short point at inner apex, though mostly concealed by 

 the fringe of plumose seta?, which extends along the inner margin, 

 even to the outer apex. Four or five spines on side of carapax about 

 the latero-anterior angle, two of them being on the margin. No ap- 

 pendages to anterior abdominal segment in male, and those of the fol- 

 lowing segments similar to one another, quite small and slender. 



Unlike species of Astacus, the base of the outer antennas is remote 



