91 



i" by the larger number (14 — 22) of teeth on the upper margin of the rostrum, 2" by the 

 longer legs, especially those o f the i ^' pair that extend by half or more than half 

 the carpus beyond the antennal scale, being a little more than one and a halfas long 

 as the carapace, rostrum included, 3" by the dactyli of 3"' and 4"' pair of legs 

 which are not longer, but distinctly shorter than the propodi. 



The largest of the 7 specimens is the female from Stat. 300, which is 114 mm. long: 

 unfortunately the legs are wanting, e.Kcept the i^' pair. The rostrum (Fig. 2 i^/), gently ascendant, 

 reaches almost to the middle of 3^'' antennular article; the upper margin, that is slightly concave 

 above the eyes, is armed with 14 close-set teeth, 7 of which stand on the carapace, while the 

 foremost is placed, in front of the eyes, just beyond the middle of the rostrum proper, between 

 this tooth and the apex the upper margin runs cjuite straight. The lower tooth, directed forward 

 and downward, is situated about midway between the foremost tooth and the tip of the rostrum. 

 In the two males from Stat. 262 the rostrum runs straight forward to a little beyond 2"'' anten- 

 nular article and is -\--dentate; 6 teeth stand on the carapace, the anterior tooth just beyond 

 basal antennular article, so that the, slightly upturned, distal unarmed part of the upper margin 

 appears rather short. The lower tooth which is directed horizontally forward, is placed, in the 

 larger male, just before the foremost tooth of the upper border, in the other midway between 

 this tooth and the tip. In the egg-bearing female the rostrum is horizontal and extends a little 

 beyond 2"<i antennular article; the upper border is armed with 14 teeth, 7 of which stand on 

 the carapace, while the foremost is implanted just on the middle of the rostrum proper, so 

 that the distal unarmed part appears just as long as the distance between the foremost tooth 

 and the orbital margin. The lower tooth is placed twice as far from the foremost tooth as 

 from the apex of the rostrum. In the second female the rostrum, of which the unarmed distal 

 part is slighdy upturned, extends a little beyond 2"*^ antennular article and bears i6 teeth, 7 

 of which stand on the carapace, while the anterior tooth is implanted above the far end of 

 basal antennular article; the two anterior teeth are a little larger, i.e. longer, than the preceding 

 and the unarmed distal part measures one-third the length of the rostrum proper. The well- 

 developed lower tooth is directed horizontally forward and placed midway between the anterior 

 tooth and the tip. The rostrum of the third ova-bearing female resembles that of the second, 

 but of the 1 6 closely-set and equally long teeth 6 stand on the carapace and the tip is hardly 

 upturned. The female without eggs belongs no doubt to this species, because the legs of the 

 1*' pair reach about by two-thirds of the carpus beyond the antennal scale, but the rostrum 

 that extends horizontally to the far end of 2"'^ antennular article, seernc to bear only i 2 teeth, 

 for the 3 anterior are broken oft"; 6 stand on the carapace and the unarmed part of the upper 

 border is almost half as long as the rostrum. 



For the rest the carapace of this species resembles that of Xcmat. undulatipes Bate 

 and the abdomen does also not appear to differ, the posterior border of the 3'''^ abdominal 

 tergum being as much produced in the middle line and the telson presenting the same form 

 and length. 



Also as regards the eyestalks and eyes and the two pairs of antennae both species 

 apparently resemble one another. 



