310 DE. J. G. DE ilAN ON SPECIES OF PAL^MON 



is sliglitly more distant from the second than tlie others, and the distance of the foremost 

 tooth from the tip is a little longer than tlie interspace between the preceding teeth. 

 Pive teeth are on the ceplialothorax. The rostrum is slightly convex above the eyes and 

 its distal half is directed downward. 



In young individuals of tbis species (fig. 39) the posterior extremity of the telson 

 ends in an acute triangular point, and of the two spines on eacb side the inner larger 

 one reaches beyond the acute extremity ; the anterior pair of spinules is situated imme- 

 diately behind the middle. In older individuals, however, tbe telson exti-emity is 

 usually more or less worn off, and it is therefore quite erroneous to describe it as 

 largely rounded, as H. Milne-Edwards and Ortmanu have done (Ortmann, in Zool. 

 Jalirb., Syst. v. 1891, p. 729, Taf. 47. fig. 7). In the male from Liberia the 

 extremity of the telson appears still triangular, but the acute point is already 

 w(nn off. 



The outer footjaws of this specimen are just as long as the peduncles of the upper 

 .•intenna?, overreaching those of the lower antennae by tbeir terminal joint. 



The legs of the first pair extend for half their carpus beyond the scaphocerites ; and 

 the hands, Avbich are 11'5 mm. long, and in which the fingers appear a little shorter 

 than the palm, are slightly more than half as long as the wrist, which measures 20"6 mm. 



The larger leg (fig. 10) of the second pair is situated on the left side. The merus 

 reaches almost to the end of the antennal scales. The carpus, which is 10 mm. broad at 

 its distal extremity, is not shoi'ter than the merus when the upper surface is measured ; 

 and an individual of about the same size, in which both joints were also equally long, 

 has been described by Aurivillius from Cameroon {I. c. p. 17). The hand, a little more 

 than half as long as the body, is somewhat more than three times as long as the carpus, 

 and the palm appears almost twice as long as this joint. The palm, somewhat more than 

 three times as long as broad, is a little broader than the carpus and a little less thick 

 than broad, viz. 11'5 mm. thick and 12'5 mm. broad. The fingers, a sixth shorter than 

 the palm, are armed each with a conical tooth, that on the immobile finger is some- 

 what larger and sitviated somewhat closer to the articulation than on the dactylus ; 

 between this tooth and the articulation the dactylus carries in addition three small obtuse 

 teeth, the immobile finger only one. The fingers are slightly curved imvard, and leave 

 therefore a narrow interspace between them when closed. The whole leg is closely beset 

 with small acute denticles, which are larger and less numerous on the inner side. The 

 ri'>ht leg fully agrees with the other, but the carj)us is a little shorter than the merus, 

 the fingers are almost as long as the palm, and the teeth with which they are armed 

 are considerably smaller. 



The Ic'S of the third pair reach as far as the scaphocerites, those of the fourth as far 

 as the external maxillipedes, and the legs of the last pair extend to the end of the 

 peduncles of the outer antennae. The meropodites of the fifth pair are 16 mm. long and 

 225 mm. thick, measured on their lateral side ; the carpopodites 9 mm. long and 225 mm. 

 thick at their distal end; the propodites 15 mm. long and l-4< mm. thick in the middle, 

 measured on their outer side. 



The three males from the lliver Prah are about the same size as that from Liberia ; 



