482 G. 0. SARS, 



in female, penultimate joint of the peduncle produced at the end to a long, 

 tliumb-like projection having a ver}' small secondary denticle inside near the 

 base, the projection, being in female rather narrow, spiniform. in male much 

 broader, lanceolate, and extending to the end of the last peduncular joint; the 

 latter without any lateral protuberance, but produced at the end to a some- 

 what blunted projection, which, however, in female is quite rudimentary. 

 Posterior gnathopoda witli the dactylus not denticulate inside. Anterior 

 pairs of pereiopoda rather slender, with the meral joint but slightly ex- 

 panded. Last pair of pereiopoda witli the outer joints narrow and partly 

 edged with strong spines. The 2 anterior pairs of uropoda very densely 

 spinous. Last pair of uropoda with the outer joint carrying several spines 

 in addition to the setae. Telson with an erect spine on each side of the base. 

 Length of adult female oy^ ram. 



Bemarks. — The present new species is prominently distinguishable by 

 the spinous armature of tlie urosome, not found in any of tlic otlier species, 

 and also some of the appendages, wliich are generally without spines, are 

 in this species provided with such, for instance the last jiair of pereiopoda, 

 the telson and the last pair of uropoda. Its nearest ally would seem to be 

 C. chelicorne, but it also differs in several other points from this species, 

 for instance in tlie much more elongated superior antenna', and tlie likewise 

 more slender antei'ior pairs of pereiopoda, as also in the fact of tlie dacty- 

 lus of the posterior gnatliopoda not being denticulated. 



Description. — The length of a fully adult, ovigerous female measures 

 about O'/g mm. and this form accordingly grows to a somewhat larger size 

 than C. chelicorne. 



The general form of tlie body (see fig. 18) is that cliaracteristic of the 

 genus, though perliaps somewhat more slender than in G. chelicorne. 



The cephalon about equals in length the first 2 segments of the meso- 

 some combined, and has the frontal margin not at all produced in tlie middle, 

 but only slightly arcuate. The lateral lobes are not very prominent, and are 

 narrowly rounded at the tip. 



The 1st pair of coxal plates exhibit the usual triangular forni, and carry 

 on the tip 4 slender seta*, and along the anterior edge a number of much 

 smaller bristles. 



The epimeral plates of the metasorae, as in the other species, are ex- 

 tended laterally, and densely fringed with bristles. 



The urosome (fig. 22) has all its ?> segments very distinctly defined, and 

 armed dorsally, at some distance from the posterior edge, with a transverse 

 row of spines, their number on the 2 anterior segments being from 6 to 10, 

 on the last, only 2. Besides these, each of the 2 anterior segments is armed 



<^|]3.-MnT. crp. 312. 62 



