i8 



outer margin is serrated near the base and the inner margin bears a series of about lo strong 

 spiniform teeth. The propodus is a Httle more slender than the carpus and the dactylus is much 

 more slender and % the length of the propodus. It bears a long slender curved terminal spine 

 and several setae on the inner margin. All the other segments of the limb carry long plumose 

 hairs. The exopod is a little shorter than the basis. The proximal segment of the exopod and 

 all the segments of the endopod except the dactylus have the surface roughened with closely 

 set sharp points becoming squamiform in some places and spiniform in others. 



The first legs (PI. II, Fig. 21) are "/^ of the total length of the carapace and a little 

 longer than the third maxillipeds from which they differ little in the proportions and shape of 

 their segments. The basis is a little more slender distally and does not bear any very long 

 setae at its distal end. The merus is not produced externally. The carpus is dentated on the 

 inner edge but the teeth are not so large and spiniform as on the maxilliped. The dactylus is 

 about -/.-i the length of the propodus. 



The second legs (PI. II, fig. 22) are long and rather slender. The basis is a little more 

 than two thirds the length of the remaining segments together. The ischium is distinct though 

 short. The carpus is longer than the propodus and dactylus together. It bears a series of 

 seven long and slender spines on its inner edge and a single spine on its outer edge. The 

 propodus is half as long as the dactylus which is slender and has a long and very slender 

 apical spine. 



The remaining pairs of legs diminish successively in length, the fifth (PI. II, fig. 24) 

 being four-sevenths the length of the second pair. The third (PI. II, fig. 23) and fourth pairs 

 carry a very minute vestige of the exopodite consisting of two segments tipped with a few 

 setae (fig. 23rt;). In the second pair the basis is longer by one-third than the remaining segments 

 together, in the fifth pair it is only two-thirds of that length. On all the legs the surface, 

 especially of the proximal segments, is rough with close-set granules. 



The uropods are long and slender. The peduncle is longer by one quarter than the 

 telson and is beset with minute granules which appear as serrations on its outer edge. The 

 inner edge bears seven or eight small spines on its distal half. Both rami are broken in the 

 single specimen but their basal portions show them to have been rather long and slender and 

 armed with slender spines. 



Occurrence. Station 211, 1158 metres, i specimen. 



Remarks. As I did not wish to dismember completely the solitary specimen of this 

 remarkable form I am unable to give details as to the structure of the mouth-parts which might 

 have thrown light upon its systematic position. In the general form of the body, the large and 

 tumid carapace, the well-marked pseudorostrum, the slender abdomen, the narrow telson, and the 

 long and slender uropods it agrees with most of the Diastylida. It differs from that family 

 hoewever in possessing three instead of two terminal spines on the telson. In this respect it 

 agrees better with the Lampropidcp , a family which, notwithstanding the considerable differences 

 of general form, appears in most other characters to be not distantly related to the Diastylidce. 



