12 TAGE SKOGSBERG, A NEW FRESH-WATER OSTRACOD. 
stripes on the proximal articulations I have always found to agree closely with the 
type represented in the drawing, only slight variations being found. (The stripes of 
the inner as well as those of the outer side are shown in the drawing.) 
Second antenna: Five-jointed, two basal joints and a three-jointed endopodit; 
the second endopodit joint without sign of further segmentation. The first basal joint 
has three subequal bristles of moderate length furnished with short and fine second- 
ary hairs, one situated laterally somewhat behind the middle of the joint, the two 
others ventrally somewhat in front of the middle. Second basal joint: with a single 
very long short-haired seta originating ventero-distally on the medial side. The exo- 
podit provided with three bristles, the ventral of which is naked and very short, 
hardly longer than the scale-like stem; of the two others which are short-haired the 
dorsal is somewhat longer than the anterior side of the first endopodit joint, the 
other hardly a third of this length. The posterior sensorial bristle of the first 
endopodit joint is somewhat longer than a third of the posterior side of this joint; 
it is baculiform and composed of three segments; the proximal segment, the manu- 
brium, about two to three times the length of the middle one, and these two seg- 
ments taken together are about as long as the end-segment; middle segment pro- 
bably flexible, end-segment distinguished from the two proximal by numerous very 
small foramina arranged in dense longitudinal parallel rows; postero-distally, moreover, 
this joint carries a short-haired long and rather strong bristle and, anteriorly, inside its 
distal edge a transverse series of six bristles originates; of the latter the five poste- 
rior, the natatory set&e, are subequal and extend considerably beyond the tips of 
the long terminal claws; they carry ventrally rather long fine secondary hairs; the 
anterior bristle of this series is short-haired and only about a third of the length of the 
others. Second endopodit joint: at about the middle of the anterior side two sub- 
equal short-haired bristles of moderate length and, just opposite, on the posterior 
edge, five bristles; the lateral of the latter is very short, almost quite rudimentary, 
the other four of somewhat different lengths, the longest extending somewhat beyond 
the end-joint; the two posterior of the four last-mentioned carry short secondary 
hairs, the two anterior — evidently representing the »Männchenborsten» (G. W. MULLER, 
1900, p. 10) of other genera — are quite naked, not, however, as far as I have been 
able to find, differentiated into specific sensorial bristles; from the distal extremity 
of this joint seven bristles originate; the two anterior are developed as powerful 
claws, strongly pectinated and slightly arched, subequal and almost reaching the length 
of the anterior edge of the first endopodit joint; two of them are attached laterally 
at about the middle height of the joint, one somewhat proximally to the other; the 
proximal is naked and a little longer than the two anterior end-claws, but very thin; 
the distal is somewhat shorter and stronger than the proximal and slightly pecti- 
nated; two of them are medial, one, about opposite to the two last-mentioned, claw- 
shaped, extending to less than half the length of the two powerful anterior claws, 
rather weak, pectinated; the other originates just within the end-joint, is weak, naked 
and about twice the length of the latter; the last of these seven bristles is fixed 
