206 ('■ 0. SARS, 



and each tipped by a dense fascicle of unequal spines. The last pair (tig. 19) 

 are very small, scarcely at all reaching beyond the others, and of a rather 

 different structure. They consist each of a rather thick and massive basal 

 part armed at the end with several spines, and of 2 very unequally deve- 

 loped rami. The inner ramus is extremely small and scale-like, whereas the 

 outer is somewhat longer than the basal part and of a rather narrow, sub- 

 linear form, having a distinctly defined terminal joint setiferous at the tip. 

 The proximal joint of this i-amus carries on each side a single fascicle of 

 spines intermingled with delicate bristles, and from its tip also issue several 

 spines and fine bristles. 



The telson (fig. 20) is rather broad in proportion to its length, and 

 nearly semicircular in outline. It is divided by a deep and narrow cleft into 

 two halves, each of which carries at the outer edge, near the base, a small 

 spinule and at the tip another spinule accompanied by a few tine hairs. 



The adult male (PI. VI, lig. 1), as usual, attains a somewhat larger size 

 than the female, its length amounting to nearly 15 mm. 



The fonn of tlie body is not very much difterent form that in female, 

 though perhaps a little more slender and compressed. The dorsal projections 

 generally ai)]ienr somewhat larger and more prominent, being more pronoun- 

 cedly lamellar in character. In the specimen here figured there was a distinct 

 attempt to such projections even in the 3rd and 4th segments of the meso- 

 some, a case rather rarely met with, the projections being, as a rule, not 

 distinctly developed in front of the 5th segment. 



The antennae (see fig. 1) appear somewhat more elongated than in the 

 female, es])ocially the inferior ones, which however still are C(insideial)ly 

 shorter than the supei'ior. 



The gnatho])oda (figs. 3 and 4) are very str(mgly developed and nearly 

 equal in size, with the propodos rather large and of an oblong clavate form, 

 being somewhat expanded distally, especially in tlie jiosferior (ines (fig. 4). 

 The palm is distinctly concave, and defined below by a projecting, nearly 

 rectangular corner armed with 2 sjjines. Another rather strong spine occurs 

 on the outlier side of the palm below the middle, and is accompanied by a 

 fascicle of slender bristles. 



The pereiopoda appear a little moi-e elongated than in the female, and 

 the basal joint of the 3 posterior pairs is comparatively narrower. Especially 

 is this the case with the last pair (fig. 6), where that joint appears much 

 less expanded than in the female (comp. PI. V, fig. 16) and thereby acquire 

 a rather different form. 



The last pair of ui'opoda (fig. 7) and the telson (fig. 8) do not differ 

 much from those pai-fs in the female. 



^us.-MaT. CTp. "Oi5. 28 



