ASTACIDEA. 



527 



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

 tion. 



Paranephrops tenujcornis. 



Rostrum elongatum, acuminatum, tenue, bases antennarum hngitudine 

 superans, utrinque i-sjmiosum et posterius super carapacem utrinque 

 aJiis spinis duabus. Pedes 8 posiiei gracilUmi. Pedes antici longi, 

 manu vix crassiore quam carpus, margine super no biseriatim spinoso, 

 superficiebus interna extemdque uniseriatim spinosw, margine infe- 

 riore et superficie proximd spinuli-scabris et non seriatim spinosis. 



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

 antenna), 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. 4a, 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 bv 

 the fringe of plumose setae, 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 antennae is remote 



