92 



According to the Table of measurements on p. 89 in Nemat. undulatipes Bate the 

 I*' pair of legs are shorter than twice the length of the carapace, the rostrum excluded, 

 in Nemat. gracilis^ however, longer than twice the length of the carapace without the 

 rostrum and, while in the former these legs reach only by one-third of the car])us or still 

 less beyond the antennal scale, in Nemat. gracilis one-half to more than two-thirds 

 of the carpus extend beyond the scaphocerite. In the two males from Stat. 262 two-thirds of 

 the carpus reach beyond the antennal scales, in three females three-fifths, in the fourth female 

 and in the female from Stat. 300 one-half the length of the carpus. The spinulation of ischium 

 and merus is the same as in Nemat. vndiilatipes. 



Owing probably to the specimens from Stat. 262 being not yet full-grown, the legs of 

 the 2""^ pair are still distinctly shorter than the entire body, while, according to Col. Alcock, 

 whose largest female measured 84 mm., they should be nearly as long as it; these legs project, 

 in the ova-bearing females from Stat. 262, by the chela, carpus and about one-third of the 

 merus beyond the antennal scale. The chela measures one-sixth the length of the carpus, but 

 for the rest the relative measurements agree with those of Nemat. undulatipes \ the spinulation 

 of the ischium is the same as in this species, the merus, however, is not only armed with 4 

 or 5 spinules on the posterior border, liut the opposite border bears also 3 or 4 similar spinules, 

 besides the somewhat larger spine at the thickened distal extremity. 



Quite characteristic are the legs of the 3''^' and 4"' pair. The peraeopods of the 3'''^ pair 

 are in our specimens nearly as long as the entire body, while in full-grown individuals they 

 are very much longer than it; they project by the chela, the carpus and two-thirds of the 

 merus beyond the antennal scale. The proportion between the length of merus, carpus and 

 propodus is the same as in Nemat. U7idulatipcs, but the dactyli, in stead of being longer, are 

 in Nemat. gracilis distinctly shorter than the propodi, measuring only two- 

 thirds or three- fifths of these joints; the dactyli have a characteristic, waved form. 

 Spinulation like in Nemat. undulatipes., but the proximal spinule of the ischium seems to 

 be wanting. 



The legs of the 4"' pair are about as long as the 3'''^ and project in the male by two- 

 thirds, in the female by three-fifths of the merus beyond the antennal scale; these legs are in 

 our specimens comparatively shorter than in Nemat. undulatipes and, like in the 3''^ pair, 

 the dactyli measure only two-thirds of the propodi, while they show the same form as in 

 these legs. Spinulation like in the 3''' pair. Unfortunately the legs of the 5"^ pair are only 

 complete in the larger male from Stat. 262, they are here a little shorter than the body and 

 project by about one-third of the meri beyond the antennal scale; the ischium is unarmed and 

 the spinules of the merus are also less in number than in the two preceding legs. Terminal 

 joints like in Nemat. undulatipes. 



Like the typical specimens collected by the "Challenger", also the specimens from 

 Stat. 262 were taken together with the numerous individuals of Nemat. undzilatipes Bate. 



