70 G. 0. SARS. [No. 8. 



laterally (fig. 5) the dorsal face of this division appears far 

 less vaulted than in B. orientaUs and more evenly tapering an- 

 teriorly. The tail (fig. 10) is rather short, scarcely exceeding 

 Va of the length of the anterior division. Its 1st segment is 

 comparatively very large, considerably exceeding the remaining 

 part in length, and has the distal part nearly cylindric, whereas 

 the proximal part is rather expanded and provided on either 

 side with a small but distinct spine pointing straight outwards. 

 The 2nd segment, though very short, is rather well defined from 

 the two succeeding, which are fused together and only indicated 

 by a slight indentation of the lateral edges. The furcal lobes 

 are still somewhat shorter than in the preceding species and 

 very little longer than they are broad, for the rest nearly 

 agreeing in structure with those in D. orientaUs. 



The anterior antennae (see figs 5, 6) are exceedingly slender 

 and elongate, even considerably longer than the whole body, 

 and taper successively to the end. They are composed of the 

 same number of joints as in the preceding species, but towards 

 the end the joints become relatively much more slender (see fig. 

 7), and also the setae attached to them are considerably longer 

 than in that species. During the movements of the animal 

 these organs are borne in a similar manner as in D. orientate, 

 being rather abruptly curved at the base, whereby the remain- 

 ing part points somewhat obliquely posteriorly. When reflexed 

 along the sides of the body (see fig. 5) they considerably extend 

 even beyond the tips of the caudal setae. 



The last pair of legs (fig. 8), though of a similar structure 

 as in the preceding species, are comparatively smaller, and both 

 rami exhibit moreover well-marked differences. Thus the inner 

 ramus is very short, not reaching beyond the middle of the 1st 

 joint of the outer ramus, and exhibits a simple conical form, 

 without any distinct apical spines. The unguiform expansion oi 

 the 2nd joint of the outer ramus is relatively shorter and 

 broader than in D. orientaUs, and does not attain the length 

 of the preceding joint. Finally the terminal joint (see fig. 9) 18 



