.KM lAdlo si\(Kisiti':ii(i 



K i r s t a II t CM II a: Tin- lil'lli and sixth iuinls. altlmu^li still lice, scciii to show 



a cfrtjiiii tendt'iU'V to liocoinc joined t<) cacli other. The approxiiuute proportions lietweeii 

 tlie joint.'' arc ns follows: 



I '': ll'-: III ;; l\ : ; \ •; VI :;; \ II ; ; \ III (>.:!. 



Tht> nn»st strikinji fart is perhaps the Lrreat rediu tion ot the third joint; this joint has. however. 

 no marked tendoncv to l)eeonie joined to the neigh bouring joints. 'Plie posterior bristle ol I he 

 third joint and the postero-distai bristle of th(> fouiih joint are about suber|iial and almost 

 completely rediu-eil; their |en<j;th corresponds to about the breadth ol' the sensory bristle ol 

 the Hfth joint proximally. The anterior bristle of the third joint, the antero-distal bristle of 

 the fourth joint, the medial-distal bristle of the sixth joint and the a-bristle of the seventh joint 

 are all subequal. of about the total length of the fifth and sixth joints and have short, fine hairs. 

 The sensory bristle of the fifth joint is .somewhat longer tliaii thi' anterior side of the seven 

 distal joints (the proportion is about 57 : 50) and has eleven sensory filaments. The seven 

 proximal ones of these are fixed between about a tliird and a quarter of the distance along the 

 bristle, are rather thick and long, being about a third of the whole length of the bristle, and are 

 liare. The three following ones are considerably shorter, about a fifth to a sixth of the total 

 length of the bristle, and narrow; they are furnished with a few, about one to three, weak second- 

 ary spines, and are separated from the others by a decided gap. The most distal of these 

 filaments is quite short and bare, and is fixed near the point of the bristle. Of the bristles on 

 the two distal joints the b-bristle is not quite as long as the five distal joints, and has four short 

 filaments which are almost quite bare; the f-bristle is about as long as the anterior side of the 

 seven distal joints and is characterized by eight or nine filaments, the c- and g-bristles are 

 subequal and about a third longer than the last-mentioned one and have ten filaments. Some 

 of the proximal filaments on the three last- mentioned bristles, the c-, f- and g-bristles, have 

 a few (about one to four) short, weak secondary spines. The two simple sensory bristles d and 

 e are subequal and almo,st as long as the anterior side of the second joint. Pilositv: The second 

 joint is rather well furnished with hairs, especially postero-distally; otherwise this lindj is smooth. 

 Second antenna: — Protopodite: Length, about 0,6 mm. The medial- 

 distal bristle is relatively long, of about the same length as the longest of the bristles of the 

 first endopodite joint; it has short, fine hairs (fig. 10). The e x o p o d i t e (fig. 9) has abo\it 

 the following proportions between the joints: 



I : If : III : W : V : VI : VII : VIII : IX =-- .30 : (> : 3 : 3 : .3 : 3 : .S : 2 : 2. 



In other words 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 two following joints, the other joints 

 are subequal. The bristle of the second joint is about as long as or somewhat longer than the 

 total length of the eight distal joints; it is furnished ventrally with a few — in the two cases 

 investigated there were eight — smooth, powerful secondarv spines, sparsely placed, and dorsally 

 it has a corresponding number of short, rather fine, bristles, situated opposite the ventral spines. 

 The proportion between the length of the longest natatory bristles and the whole exopodite 

 is about five to three. The natatory bristles have broad natatory hairs jilaced close together. 



