599 

 11 Janassa capillata, (Rathke). 



(PI. 214). 



Fodocenis capillatus, Rathke, Nova Acta Csesar. Lcop. Carol. Nat. Cur. XX, p. S9. 



PI. IV, fig. S. 



Syn. : Jassa capillata, Bruzelius 

 > Janassa variegata, Boeck. 



Body very strongly bnilt and rather tumid, especially in the female, 

 with broadly vaulted back. Cejthalon comparatively small, not nearly attain- 

 ing the length of the first 2 segments of mesosome combined, anterior part 

 greatly narrowed, with the lateral lobes very minute and narrowly rounded- at 

 the tip. Coxal plates scarcely deeper than the corresponding segments; 1st 

 pair subquadrangnlar, with the anterior corner somewhat more projecting in 

 male than in female; 2nd pair in both sexes less deep, and transversely ellip- 

 tical in form; the 2 succeeding pairs considerably larger, and nearly equal; 

 5th pair with the anterior lobe almost as deep as the preceding pair. Epimeral 

 plates of metasome not very large, but rounded at the lateral corners. Eyes 

 small, roiinded, with dark pigment. Superior antennae exceeding in length 

 Va of the body, the last 2 joints of the peduncle nearly equal-sized, and each 

 much longer than the 1st, all o being densely setiferous posteriorly, and 

 having anteriorly scattered tufts of stiff bristles, flagellum scarcely as long 

 as the last peduncular joint, and composed of only 3 articulations, the 1st 

 of which is very large, the other 2 extremely minute; accessory appendage 

 only represented by a minute nodule carrying 2 slender bristles. Inferior 

 antennae much stronger than the superior, especially in the male, and also 

 longer, exceeding, in that sex, half the length of the body, both the peduncle 

 and the flagellum densely clothed with stiff bristles arranged in numerous 

 brush-like wreatiis, tlagellum, as in the superior ones, Sarticulate, but some- 

 wiiat larger, equalling in length the last peduncular joint. Anterior gnatho- 

 poda of nearly same shape in the two sexes, carpus well developed, and 

 triangiilar in form, propodos somewhat expanded in the middle, with the 

 palm straight and rather oblique, being defined below by an obtuse angle 

 armed with 2 or 3 spines. Posterior gnathopoda in female very powerfully 

 developed, with the carpus extremely short, and the propodos large and broad, 

 having the upper edge boldly curved, and the lower produced to a triangular 

 projecting corner defining the palm posteriorly, this being deeply excavated and 

 angularly projecting in front, dactyhis strong and curved; posterior gnathopoda 

 in male still more strongly developed, with the propodos exceedingly large, and 



