Amphipod from New Zealand. 5 



off as a separate joint, the ramus bears a few fine setffi, and 

 at the end two long feathered sette ; the inner ramus also 

 bears two or three long feathered set^e at the extremity *. 



The telson (fig. T) is either double or very deeply cleft, each 

 half about twice as long as broad, narrowing slightly towards 

 the end, and apparently partly rolled up so as to be convex 

 above ; at the end is a stout spine and on the upper surface 

 two smaller ones placed towards the outer margin and at 

 some distance from the distal end. 



The two halves of the telson are separated on my slide, 

 and it is possible that fig. T, PI. V., in which the left half 

 has been restored, does not give a correct idea of their natural 

 position, and that the inner margins should be more closelj^ 

 approximated. 



Remarks. — While the imperfect condition of the specimen 

 described leaves much of its structure still uncertain, the 

 points that can be made out are, perhaps, of some importance 

 in their bearing on the systematic position of the genus 

 Pldtyischnopus. It is evident, too, that in the gnathopoda 

 and in the telson this species differs markedly from P. mira- 

 hilis and also from the characters laid down by Stebbing for 

 the genus ; but the resemblances in other respects are so close 

 that there is no doubt of the near relationship of the two 

 species, and they may as well stand together until the genus 

 is better known and its limits clearly defined. Farther, the 

 points in which P. neozelanicus differs from P. viirabilis 

 bring it more into harmony with other allied species, and 

 seem to show that Stebbing was undoubtedly right in placing 

 his genus in the family Pontoporeiidaj. Stebbing has 

 already pointed out the relationship of Platyischnopus to 

 Urothoe as shown by the per^iopods, and in the present 

 species we find in the gnathopoda also some approximation 

 to Urothoe; this is best seen in the first gnathopod, though 

 the limb appears to be simple instead of subchelate: the second 

 gnathopod differs from that of Urothoe in being chelate, but 

 the chelate character is not very marked, and from the figure 

 given by Stebbing it seems as if we get a slight approach in 

 the same direction in Urothoe pulchella, Costa f ; and it is, 

 perhaps, as well to recall the fact that Costa described and 

 figured the second gnathopod of this species as having the 



* lu the present dissected state of my specimen there is nothing to 

 indicate which is the outer ramus in the uropoda ; but from the analogy 

 of Urothoe &c. I have assumed that it is the outer one that is the longer 

 in each case. 



t Stebbing, "On the Genus Urothoe and a new Genus Urothoides," 

 Trans. Zool. iSoc. London, vol. xiii. pt. 1 (1891) pi. iv. A, </«. 2. 



