159 



The anterior portion of the pleon, with its two trans- 

 verse sutures, are well seen at the sides. The posterior 

 portion has three lobes, the middle one slightly projecting 

 behind more than the others; below these the surface ia 

 slightly excavated medianly, and then descends obliquely to 

 the posterior notch. The posterior notch is shallow, the 

 channel becoming deeper inwardly ; there is a median triangu- 

 lar process which over-reaches the sides, is oblique in direc- 

 tion, and subacute. 



The first peduncular joint of the antennule has the 

 usual distal notch, the posterior limb of which is longer than 

 the anterior, but does not reach the end of the second joint. 

 The third joint is longer and narrower than the second. The 

 flagellum has 14 joints. 



The antenna has the last peduncular joint longer than 

 the one which immediately precedes it; its flagellum has 16 

 joints. 



The epistome shows very slight projections in the cor- 

 responding positions as in Circeis trilohata. 



Mandibles well developed, with the usual features well 

 marked. 



The first gnathopods are shorter and stouter tnan any 

 of the legs which follow, though not markedly so; the basis 

 is thickened, the ischium subequal in length to the three suc- 

 ceeding joints taken together, these are posteriorly spined; 

 the dactylus is moderately developed. 



The following pairs of legs are moderately long, and 

 differ only in the relative length of the joints; they are poorly 

 or scarcely at all spined. The furry pads are present on the 

 usual joints. 



In the first pleopods the endopod is much broader than 

 long. The exopod has 6-7 marginal teeth; both rami are 

 areolate. The exopod of the second pleopod has areolate 

 markings, and the row of setules near the outer margin ; 

 on the same margin there are 12 teeth. The appendi.r mas- 

 cuUna is short and thick, and is attached to about the middle 

 of the inner margin of the endopod. The endopod is broader 

 than long, and has a few areolate markings. The third 

 pleopods are larger than the two pairs which precede them 

 without marginal teeth on the exopod, but with the row of 

 setules as in the others. The division is near the end, and 

 there are indistinct areolae. The endopod is distally trun- 

 cate. The exopod of the fifth pleopod has three lobes, the 

 two distal ones well developed and well apart, the third on 

 the inner margin also well marked. 



The uropods have the inner ramus much reduced, the 

 outer one strongly developed, subcylindrical, curved inwards, 



