FEOM THE INDO-PACIFIC AND WEST AFRICA. 



307 



from Togo Country, however, only one tooth is situated posterior to the orbital margin, 

 the second standing already before it. The second tooth is the longest of all, for tlie 

 distance of its tip from that of the first, 5*5 ram. long, measures just one-third the 

 distance of the tip of the first tooth from the posterior margin of the cephalothorax. 

 The two following teeth are shorter than the second, 3 mm. long, and the fifth and the sixth, 

 each a little more than 2"5 mm. long, are again a little shorter than the two preceding; 

 the sixth is 2 mm. distant from the tip of the rostrum. The teeth of the upper margin 

 are all rather small. In the middle of tlie free portion of the rostrum, immediately posterior 

 to the point of the fourth tooth, that part which is situated above the lateral crest is but 

 very little higher than that below it; the rostrum is not at all high. In the middle of 

 the rostrum the lower margin appears slightly convex ; the two teeth are still smaller 

 than those of the upper margin and are situated, about as in P. jjaiicidens, on the 

 anterior half of the inferior margin. The first is situated a little beyond the middle of 

 the fifth tooth of the upper margin, the second just behind the middle of the sixth ; the 

 distance of the second tooth from the tip of the rostrum is twice as long as the length of 

 that tooth and twice as long as the distance of the sixth tooth of the upper margin from 

 the tip. The hepatic spine is situated below and posterior to the antennal one, exactly 

 below the first tooth of the rostrum. Our specimen also agrees with Hilgendorf's 

 description in this character, that the two pairs of spinules on the upper surface of the 

 telson are situated more backward than in P. macrubrachion, as is represented in my figures. 

 The telson (figs. 31 & 32), which is 11 mm. long and 4 mm. broad at base, ends in an acute 

 median tooth, with two spines on each side as usual, the inner of which extends beyond 

 the median tooth, about as in F. macrobrachlon. The anterior pair of spinules on the 

 upper surface is situated 6 mm. from the anterior end of the telson, immediately behind 

 the middle ; it is 2*25 mm. distant from the posterior pair, and the latter 2-75 mm. from 

 the tip of the median tooth at the end of the segment. In P. macrobrachioii, however, 

 the first pair of spinules is situated just before tlie middle of the telson. The eye- 

 peduncles are a little longer than broad. The short flagellura of the upper antennae, 

 which is distinctly serrated and 12"5 mm. long, is united only for a sixth of its length 

 with the outer one, and is scarcely longer than their peduncle. 



The outer footjaws reach two-thirds of their terminal joint beyond the distal end 

 of the peduncles of the outer antennte. The legs of the first pair (fig. 33) project 

 a fourth of their wrist beyond the distal end of the antennal scales. The slender 

 carpus is 115 mm. long and 0"9 mm. thick at the distal end ; the hands are half as long 

 as the wrist and tlie fingers are just as long as the palm. 



Unfortunately, one of the second legs is lost ; tlie other, 75 mm. long, has almost the 

 same length as the body. It is a rather feeble leg in proportion to the size of this 

 specimen ; but I have shown in the description of P. macrobrachioii that the length 

 and the size of the second legs diller sometimes very much in different specimens : 

 compare, e. g., in the Table on p. 321 the male (No. 1) from Liberia and that from the 

 Congo (No. 1). The second leg (fig. 34) of our specimen from the River Kribi 

 much resembles that of P. macrobrachioii as regards the proportion of the length of 

 the joints, but it differs at first sight in the absence of the looolly felt with which the 



SECOND SERIES. — ZOOLOGr, VOL. IX. 



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