:^S(; TACK SKOCSliF'iUC. 



se^•eutll joint the b-bristle is moderately long, about equal to the length of the anterior sides 

 of the second to the fourth joints (about 19 — 20 mm. in specimens with a length of shell of about 

 6.7 mm.); it has five scattered, moderately long, sensory filaments- its distal third is without 

 an\' sliort sensory filament such as is found on most of the other end bristles. The c-bristle is 

 somewhat longer than the former one, about 2,S--3.1 mm., i. e. not quite so long as the whole 

 antenna; it has ten sensory filaments, nine rather l<mg ones and a very short distal one. The 

 f- and g-bristles of the end joint are subequal, very greatly lengthened, being about as long as 

 the whole shell or even somewhat longer (on specimens with a shell about 6,7 mm. long these 

 bristles had a length of from 6,8 to 7.1 mm.); with scattered and moderately long filaments 

 varying somewhat in number, sometimes similar on both sides, sometimes different, different 

 l)oth on the right and the left antenna and from one specimen to another; the number observed 

 was 18 — 21, the distal one of which was exceedingly short. The sensory filaments on all the 

 bristles of the seventh and eightli joints are bare. The simple sensory bristles d and e are 

 subequal and almost as long as the third to the eighth joints. Pilositv : The second and third joints 

 are only weakly furnished with hairs, the rest of the joints seem to be quite smooth. 



Second antenna: — Protopodite: Length about 2 mm. in specimens 

 about 6.5 mm. long. The medial-distal bristle is almost completely reduced and is considerably 

 shorter than the proximal bristles on the first joint of the endopodite. E x o p o d i t e (fig. 11): 

 The first joint is somewhat longer than the total length of all the following joints; the second 

 joint is about as long as the total length of the third and fourth joints, the third is about equal 

 to the total length of the fourth and fifth or a little shorter, the remaining joints are subec^ual. 

 The bristle of the second joint is very weak, quite bare and only about half the length of the 

 third joint. The proportion between the length of the long natatory bristles and the total length 

 of the exojjodite is about three to two. The former have very wide natatory hairs (cf. 

 fig. 12), which issue along the whole length of the bristle and even near the point where the 

 bristle is attached. The end joint has four bristles, of which even the two dorsal ones are 

 well developed; the shortest dorsal one, which, like the three others, has wide natatory 

 hairs situated close together along its wholi' length, is about as long as the total length of the 

 eight distal exopodite joints. The third to the ninth joints have short, conical and almost 

 reduced basal spines; that of the end joint especially is extremely weak, sometimes even difficult 

 to verify with certainty; the basal spines are sometimes provided with fine secondary teeth. The 

 e n d o p o d i t e (fig. 13) is small, verruciform and more or less distinctly two-jointed. Proximally 

 on the first joint there are four subequal, moderately long, bare or almost bare bristles. Distallv 

 on this joint there is a single bristle, in most ca.ses somewhat shorter than the four ])n)ximal 

 ones and ol the same type as these. The bristle of the end joint is rather long, about a (juarter 

 of the length of the protopodite of this limb. 



M audible: — Pro t o p o d i t e: Tlu^ endite on the coxale has over the greater 

 ])art of the dorsal-lateral and dorsal-medial sides only a few short and ratlu>r weak spines; 

 ventrall)' and distally, on the other iumd, the spines are numerous aiul father long and [)owerful. 

 Uistally it is weakly l)ifurcateti; tlie two points are a good deal more powerful than the other 

 spines and are lurnished with a few secondarv s))ines; between these two points there is a h)W 



