Palaeraon/row near Sydney. 367 



the upper border, where they are much smaller and rare. 

 The upper border of the ischium-joints (fi^. 2) is quite smooth, 

 but the lower border and the sides are rather sparsely covered 

 with subacute spiuules. The second legs are glabrous, except 

 the fingers. 



The third legs (fig. 7) project with three-fifth parts of 

 their propodites beyond the antennal scales; the propodites 

 (16*5 mm.) are three times as long as the dactyli (5 mm ) 

 and little shorter than the mero]iodites (17*5 mm.). The 

 fourth legs are little shorter and extend with two fifths 

 of their propodites beyond the scaphocerites ; those of the 

 fifth pair with one third of the penultimate joints. These 

 legs are rather slender. The meropodites of the third legs, 

 which are 17*5 mm. long, are 15 mm. broad in the middle, 

 measured on their outer side, so that they are nearly twelve 

 times as long as broad ; the propodites, 16'5 mm. long, are 

 1 mm. broad, sixteen and a half times as long as broad. 

 Along their lower margin the propodites of the third legs 

 bear a row of eleven or twelve spinules which are 0"42 mm. 

 long, whereas their upper border appears a little hairy and 

 covered, not very thickly, with small stout spinules only 

 0-12 mm. long, the acute tip of which is curved forward. 

 The carpi and tlie meropodites are also covered with similar 

 microscopical spinules, except on their outer surface, which 

 is nearly smooth. 



Pal. {Eupalcemon) loncf>'pe.<>, de Haan {confer de Man, in 

 Zoolog. Jahrb. ix. Ahth. f. Syst. 1897, p. 770, and x. 1898, 

 pi. xxxvii. fig. 69), diff'U-s from our species in the following 

 characters : — The carapace of de Haan's species is almost 

 everywhere covered with thickly crowded acute spinules ; 

 the rostrum is shorter, more strongly convex above the eyes, 

 and the lower edge bears only two or three teeth, which are 

 placed on the distal half. The carpus of the second legs 

 appears shorter in j)roportion to the nierus, being little more 

 than once and a half as long ; the carpus appears quite 

 straight and less slender^ for it is only nine or ten times as 

 long as thick at the distal end. The proportion between the 

 length of the chela (which, like the Citrpus, has also a less 

 slender .«hape than in our Sydney species) and the length of 

 merus and carpus is nearly the same in both species, but the 

 fingers of Pal. longxpes are slightly longer, not shorter (J)ut 

 a Utile longer)^ than half the length of the palm. Both species 

 are, however, easily distinguished by the three posterior legs, 

 which in the Japanese species are shorter and with less slender 

 meropodites ; the third legs of Pal. longipes, e. g., project 



