4-72 fi. o SARS, 



of coxal plates of moderate size and only fringed thwi rather short bristles. 

 Last pair of epimeral plates of metasome acutely produced at the lateral 

 corners, and having a few short bristles along their ])osterior edge. Urosome 

 with small, scattered spiuules on the dorsal face of the last 2 segments. Eyes 

 oval reniform. Antennae very short and stout, equal -siied, basal joint of the 

 superior ones exceedingly large, flagellum of the inferior one very small, 

 3-articulate. Gnathopoda very unequal in size, the posterior ones being 

 nearly twice as large as the anterior, projjodos in both pairs gradually 

 widening distally, palm well defined and armed at the inferior corner with 

 a remarkably elongated spine. The 2 anterior pairs of pereiopoda nearly as 

 in N. caspius; the 3 posterior pairs somewhat more slender and less densely 

 setous, basal joint of penultimate pair remarkably narrow, that of last pair 

 very much expanded, with the posterior edge strongly curved above the 

 middle, and densely fringed with very short bristles. Last pair of uropoda 

 with the outer ramus conically tapering, and fringed with scattered setae, 

 inner ramus nearly half the length of the outer. Telson with the lateral 

 lobes sub-linear, and armed each with 4 slender apical spines. Length 8 mm. 



Remarks. — The present species, which was confounded by Dr. Grimm 

 with his N. caspius, may, on a closer examination, be easily distinguished 

 by the far less hirsute coxal plates, the rather different shape of the pro- 

 podos of the gnathopoda, the more slender and less densely setous posterior 

 pairs of pereiopoda, and especially by the very much expanded basal joint 

 of the last pair. 



Description. — The length of fully adult specimens does not exceed 

 8 mm.," and this form is accordingly rather inferior in size to N. caspius. 



The general form of the body (see fig. 1 ) resembles that in A'', caspius, 

 being rather robust and tumid, with the back broadly vaulted. 



The cephalon does not nearly attain the length of the fii'St 2 segments 

 of the mesosome combined, and has the lateral lobes somewhat prominent 

 and narrowly rounded at the tip. 



The anterior pairs of coxal plates arc somewhat deeper than tlie cor- 

 responding segments, and have their distal edge fringed with comparatively 

 short bristles. The 1st pair (see fig. 4) are not expanded distally, and are 

 nearly transversely truncated at the tip. The 4th pair (see fig. 6) are some- 

 what deeper than they are broad, and exhibit a distinct angular corner 

 below the posterior emarginatiou. The posterior pairs (see figs. 7 — 9) are 

 very small. 



The epimeral plates of the metasome are well developed, and rather 

 unequal in shape, the 1st pair being rounded, the 2nd nearly rectangular, 

 whereas the last pair are considerably produced at the lateral corners, form- 



*ii3.-MiiT. CTp. 303. 52 



