280 G. 0. SARS, 



The anterior pairs of coxal plates are comparatively large, beiug fully 

 twice as deep as the corresponding segments, and ai'e fringed on their distal 

 edges with a regular row of moderately long bristles. The 1st pair are, un- 

 like what is the case in the 2 preceding species, considerably expanded in 

 their outer i)art, beiug accordingly much broader than the succeeding pair. 

 The latter are, like the 3rd pair, obliquely rounded at the tip, both pairs 

 being almost exactly of the same shape, though somewhat differing in size. 

 The 4th pair are very large and expanded, being somewhat deeper than 

 they are broad, and exhibit the usual irregular, angular shape, with a 

 distinctly projecting corner below the posterior emarginatiou. 



The 3 posterior pairs of coxal plates are comparatively small, though 

 a little larger than in the 2 preceding species. 



The epimeral plates of the metasome exhibit almost exactly the same 

 shape as in N. corpiilentus, and the last pair have a similar oblique row of 

 bristles outside the lateral corners as found in the 2 preceding species. 



The urosome is somewhat less robust than in N. corjmlentiis, but other- 

 wise exhibits a very similar appearance. As in that species, there is a small 

 dorsal spinule on the 2nd segment, and on the last segment (see fig. 19) 

 2 similar spinules are found on each side of the dorsal face. 



The eyes are well developed and of a form and size similar to those in 

 N. corpulentus. 



The antenn;c are short and subequal in length, being about twice as 

 long as the cephalon. They are rather richly supplied with bristles, generally 

 arranged in distinct fascicles, especially along the outer edge. The superior 

 ones (fig. 15) have the 1st joint of the peduncle large and somewhat flattened, 

 the second much narrower and rather elongated, whereas the 3rd joint is 

 extremely small, scarcely exceeding y^ of the 2nd. The flagellum is likewise 

 unusually small, not even attaining half the length of the 2 last peduncular 

 joints combined, and is composed of 9 articulations. The accessory appendage 

 is about half as long as the flagellum, and 4-articulate. The inferior antennse 

 (fig. 16) have the 2 outer joints of the peduncle comparatively more slender 

 than in the 2 preceding species, and densely clothed posteriorly with slender 

 bristles. The flagellum is extremely small, being ranch shorter than the last 

 peduncular joint, and is composed of 6 articulations. 



The gnathopoda (figs. 17 and 18) are very powerfully developed and 

 rather unequal in size, the posterior ones being much the stronger. The 

 propodos in both pairs, but especially in the posterior one, is very large 

 and greatly tumefied at the base, nearly obpyriform in shape, with the palm 

 very oblique and much longer than the hind margin. The defining angle is 

 on the posterior pair (fig. 18) greatly projecting and, as in the anterior 



'lH3.-MaT. CTp. 18S, 6 



