292 DB. J. G. DE MAN ON THE PODOPHTHALMOUS 



the outer auteunse, concealed, in a dorsal view, by the much 

 longer antennal scales, are a little shorter than the eyes ; the 

 naked flagella are nearly twice and a half as long as the cepha- 

 lothorax, the rostrum included. 



The strongly compressed postabdomen is nearly three times as 

 long as the cephalothorax ; the slightly impressed parts of its 

 outer surface are pubescent, like those of the cephalothorax, 

 whereas the slightly elevated parts are smooth and glabrous. 

 The first three or anterior segments are smooth and glabrous on 

 the dorsal median Hue ; they are not at all carinate, though a 

 longitudinal pubescent impression is observed on each side of the 

 smooth and glabrous dorsal median line. The lateral surfaces of 

 the postabdominal segments present other and similar impres- 

 sions, some of which are longitudinal or oblique, whereas others 

 are transverse. The fourth segment is slightly dorsally cari- 

 nate, but its carina is rather obtuse; the fifth and sixth seg- 

 ments, however, are sharply keeled, and the carina of the sixth 

 segment terminates posteriorly in a short acute angle or tooth, 

 whereas the carinse of the fourth and of the fifth segments are 

 not at all toothed posteriorly. The posterior borders of the 

 postabdominal segments are entire and smooth ; those of the first 

 and second segments present a small notch on each side, those 

 of the fourth and of the fifth a similar somewhat deeper notch. 

 The strongly compressed sixth segment is marked on each side 

 with four longitudinal impressions. The terminal segment is 

 scarcely longer than the sixth, narrow and acuminate ; it is dor- 

 sally canaliculated along its whole length, and its lateral margins, 

 which are fringed with some hairs, are quite unarmed and not spini- 

 ferous ; in P. Biclitersii the lateral margins are each armed with 

 three mobile spines, and the telson is dorsally canaliculated only 

 in its proximal half. 



The outer maxillipeds have the same length ia the male and 

 female; they are rather short and are quite as long as the ros- 

 trum, and somewhat shorter than the peduncles of the external 

 antennae. 



The anterior legs reach only to the distal end of the penultimate 

 joint of the external maxillipeds and of the antennal peduncle ; 

 the second joint of these legs, the basipodite, is armed with a 

 spine, but the third is unarmed. The hands are a little shorter 

 than the carpopodites, and the fingers are a little longer than 

 the palm. The legs of the second pair are a little longer than 



