CRUSTACEA CASl'IA. 349 



api)eudage equals iu length % of the flagellum, and is comi^osed of 3 distinctly 

 defined articulations. 



The inferior ant^nuse (fig. 3) are a little shorter than the superior, and 

 have the antepenultimate joint of the peduncle rather thick, and projecting 

 posteriorly as an angle tipped by several slender bristles. The penultimate 

 joint forms likewise posteriorly a slight angular expansion provided with 

 a number of slender bristles, and is somewhat longer than the last one. 

 The flagellum is about half the length of the peduncle, and is composed of 

 only 4 articulations. 



The gnathopoda (figs. 4, 5) are rather small, and almost exactly of same 

 shape, the propodos being in both pairs of an oval quadrangular form, with 

 the palm rather short and almost transverse. 



The 2 anterior pairs of pereiopoda (fig. 6) are rather densely supplied 

 with slender bristles, and have the meral joint comparatively large and 

 expanded distally. 



The 3 posterior pairs of pereiopoda (figs. 7- — ^9) are moderately slender 

 and but little different in length, having their outer part edged with fas- 

 cicles of slender bristles. The basal joint of the antepenultimate pair (fig. 7) 

 is rather broad and subquadrangular in form, with the infero-posteal corner 

 nearly rectangular; that of the penultimate pair (fig. 8) is considerably 

 narrower, though somewhat expanded in its proximal part. The last pair 

 (fig. 9) differ considerably from the others in the unusually large size of the 

 basal joint, which forms posteriorly a very broad and evenly rounded expan- 

 sion edged with a few small hairs, and projecting below as a broadly rounded 

 lobe reaching somewhat beyond the ischial joint. 



The 2 anterior pairs of uropoda (fig. 10) have the rami quite smooth 

 except at the tip, which carries the usual fascicle of spines. 



The last pair of uropoda (fig. 11) are of moderate size, with the iuner 

 ramus very small and tipped by a single minute spinule. The outer ramus 

 is narrow linear in shape, and only provided with a single lateral fascicle of 

 spines occuTring somewhat beyond the middle of the outer edge. The terminal 

 joint is very small, narrow conical in form, aud tipped by 3 small bristles. 



The telson (fig. 16) has the lateral halves rather narrow and each armed 

 on the obtusely pointed tip, with 2 small spiuules. The cleft, which, as 

 usual, extends to the base of the telson, gradually widens distally. 



The adult male (fig. 1 2) is a little larger than the female, attaining a 

 length of about 5 mm. 



It resembles the female in the general form of the body, but is easily 

 recognized by the somewhat shallower coxal plates, and especially by the 

 structure of the gnathopoda. 



$u3.-MiiT. cTp. 329. 7 



