STALK-EYED CRUSTACEA 199 



joint is not produced at the antero-internal angle ; the 

 fourth is obliquely truncate at the distal extremity, with 

 the antero-external angle rounded and not at all produced. 

 The legs of the first pair in the adult male are subequal 

 and not greatly elongated, with their fourth joint with 

 spines on the inner margin, and the palms externally 

 more or less distinctly longitudinally costated ; the fingers 

 elongated and armed on the interior margins with large 

 triangular lobes alternating with smaller teeth. The walk- 

 ing legs are of moderate length, with the last joint styliform 

 and compressed. The last pair of legs have their two 

 terminal joints compressed and dilated ; the last joint not 

 lanceolate, but broadly ovate and rounded at the distal 

 extremity. The abdomen is usually seven -jointed, but 

 in P. ocillatus it is five-jointed, with the third to fifth joints 

 consolidated. 



Range. — Western Atlantic, Chili, Patagonia, Aus- 

 tralian and New Zealand Seas, Indo-Pacific region; in 

 shallow and deep water. 



I. Platyonychus ocellatus. 



PlatyonycJiHS occUatus . . Milne Edwards, Herbst. 



Carapace wide, very finely granular, with the regions 

 scarcely indicated. Antero-lateral edges cut into five 

 well separated teeth, sharp and directed forwards. Front 

 straight and divided into three teeth ; the central one long 

 and sharp, the others shorter. The superior orbital border 

 has one fissure. External maxillipedes long ; the fourth 

 joint deeply notched for the articulation of the fifth. 

 Endostome smooth. First pair of legs of moderate size. 

 The fourth joint has five teeth on its anterior edge. The 

 fifth has two spines, one at its antero-internal angle, the 

 other on its external face. Hand, traversed longitudinally 



