480 fi. 0. SARS, 



The superior antennae (fig. 2) are rather slender, somewhat exceeding 

 iu length Yg of the body, and have the peduncle comparatively short, with 

 the 1st joint much the largest. The flagellum is fully twice as long as the 

 peduncle, and composed of about 1 7 articulations. The accessory appendage 

 is well developed, and 4-articulate. 



Th(! inferior antennae (fig. 3) are shorter than the superior, but some- 

 what more strongly built. The last 2 joints of the peduncle are about same 

 length, and both provided with scattered fascicles of slender bristles. The 

 flagellum is nearly as long as the peduncle, and composed of 10 articulations. 



The oral parts (figs. 4 — 9) are on the whole of quite normal structure, 

 and need not therefore be described iu detail. 



The gnathopoda (figs. 10, 11), on the other hand, are rather anomalous. 

 They arc very unequally developed, the anterior ones (fig. 1 0) being much 

 more powerful than the posterior (fig. 11), and rather densely setiferous. 



The anterior ones (fig. 10) have the carpus rather short, whereas the 

 propodos is exceedingly large and oval triangular iu form, with the palm 

 somewhat oblique, and about the length of the hind margin. The palmar 

 edge has iu front of the middle a strong denticle, and on the lower, ob- 

 tusely rounded corner 2 similar denticles are affixed. The dactylus is rather 

 elongated and falciform. 



The posterior gnathopoda (fig. 11) are extremely slender, and also con- 

 siderably more elongated than the anterior, with the carpus much longer. 

 The propodos somewhat exceeds the carpus in length, and is very narrow, 

 sub-linear in form, with the palm extremely short and transverse. It is, like 

 the carpus, provided with numerous fascicles of rather elongated bristles, 

 which are more crowded on the lower edge. 



The 2 anterior pairs of pereiopoda (fig 1 2) are exactly alike in structure, 

 and rather slender, being edged with scattered fascicles of delicate bristles. 



The 3 posterior pairs, unlike what is generally the case, are shorter 

 than the anterior, being nearly of uniform length. They are rather robust, 

 and have their outer part armed with fascicles of strong spines. The basal 

 joint is about same size in all 3 pairs, though differing somewhat in shape, 

 that of the 2 anterior ones (fig. 13) being oval quadrangular and somewhat 

 broader in its proximal part, whereas in the last pair (fig. 14) this joint is 

 obliquely expanded, so as to form at tlie infero-posteal corner a rather pro- 

 jecting rounded lobe. 



In all the pereiopoda the propodal joint exliibits a rather anomalous 

 structure (see fig. 14ffl), being somewhat compressed, and gradually widen- 

 ing towards the end, where it forms a short, but well-defined palm, armed 

 with a number of strong denticles, against which the strongly curved, ungui- 



■tii3.-M;ii'. ci'i). 810. 6o 



