276 0. 0. SARS; 



densely setiferous, the 2 anterior pairs very robust, with tlie meral and 

 carpal joints lamellarly expanded ; the 3 posterior pairs more slender, basal 

 joint of last pair very large and expanded, with the posterior edge strongly 

 arcuate and fringed with long setpe. The 2 anterior pairs of uropoda with 

 the rami subequal and armed with spines of the usual shape. Last pair of 

 uropoda comparatively short, outer ramus fringed with long ciliated setje, 

 inner ramus small, scale-like. Telsou with the lateral lobes but slightly 

 divergent and obtusely truncated at the tip, each with a row of 5 slender 

 apical spines. Length of adult male 14 mm. 



Remarks. — The present species is allied to N. caspius, but easily dis- 

 tinguishable by the more robust form of the body, the less densely hirsute 

 coxal plates, the rather different shape of the propodos of the gnathopoda, 

 and finally by the greatly expanded basal joint uf the last pair of pereiopoda. 



Description of the adult male. — The length of the largest specimen 

 measures 14 mm., and this form accordingly grows to a considerably larger 

 size than N. caspius. 



The form of the body (see fig. 1) is very robust and tumid, with the 

 dorsal face broadly vaulted, and the species thus fully deserves its specific 

 name corpulentus. 



The cephalou is of a shape similar to that in N. caspius., though ex- 

 ceeding somewhat in length the 1 st segment of the mesosome. The frontal 

 edge is but very slightly produced between the bases of the superior antennae. 

 The lateral lobes are somewhat projecting and obtusely rounded at the tip. 



The anterior pairs of coxal plates are comparatively larger than in N. 

 caspius, being considerably deeper than the corresponding segments, and 

 are fringed on their distal edge with a regular row of bristles, which, how- 

 ever, are not nearly so much elongated and so densely crowded as in the said 

 species. The plates successively increase in size posteriorly, the 1st pair 

 (See iig. 4j being the smallest and of a regular oblong quadrangular form, 

 with the outer part not expanded. The 2nd pair (see fig. 1) are somewhat 

 narrowed distally, whereas the 3rd pair are almost of equal breadth through- 

 out. The 4th pair are rather large, about as broad as they are deep, and 

 are considerably expanded in their outer part, forming below the posterior 

 emargination a rather projecting corner. 



The 3 posterior pairs of coxal plates are, as in N. caspius, small and 

 slightly bilobed, successively diminishing in size posteriorly. 



The epimeral plates of the metasome are well developed, and of a shape 

 similar to that in N. caspius. As in that species, the last pair (fig. 1 0) are 

 provided with an oblique row of densely crowded bristles outside the lateral 

 corners, which latter appear slightly produced. 



$U3.-MaT. CTp. 184. 2 



