764 TAGR SlCOOSHRnCi 



Polycope setigera n. sp. 



Description: — Shell: — Length: (l,70 mm. S e e ii i r o m t h e side it is almost 

 circular (see the appended fig. 1) and has an extremely small ventrally pointing spine at about 

 the middle of the anterior side. Seen f id m b e 1 o w it is lentil-shaped, about the same as 

 in pi. 8, fig. 29, (1. W. MULLER, 1894. Th(> s u r f a c e of the shell has small foveolae situated 

 close togetlier and has a scarcely perceptible reticulation. 



First antenna (see the appended fig. 2) : — This has four joints; the first and the 

 second joints are rather closely joined to each other, the former, asG. W. Mliller pointed out, 1894, 

 p. 23.3. being situated laterally of the latter. The proportion between the joints is about as follows: 



I:II:III:IV = :i::;;: 1:1 

 The first joint has no bristles. At the middle of the dorsal side of the second joint there is a 

 short-haired or almost bare bristle, which is about half as long as the dorsal side of this joint. 

 The third joint has dorsally a plumous bristle, which is somewhat longer than this joint. The 

 end joint has five narrow natatory bristles, the four longest of which are about twice as long as 

 this limb, the remaining one about a third shorter; they are all furnished proximally with rather 

 short natatory hairs and are bare distally. The wall of the second joint grows very much thicker 

 dorsally, distally of the bristle. Pilosity: The first joint has some oblique longitudinal rows 

 of short, fine hairs on the inside. Second joint: Proximally of the bristle this joint is furnished 

 dorsally with a dense mass of rather long hairs and has moderately long hairs scattered medially. 

 Distally of the bristle this joint is furnished with short, stiff hairs, placed close together dorsally; 

 similar hairs are also found along the distal edge of this joint. There is a collection of rather 

 long hairs ventrally on this joint just in front of the ])oint where the bristle is fixed. The third 

 joint has short, fine hairs ventrally. 



Second a n t e una: — P r o top o d i t e: This is about a quarter of the length 

 of the shell and is of tlie type reproduced by G. ^^^ ML'LL,ep,, 1894, pi. 7, fig. 5; it has no 

 bristles or appendages. E x o p o d i t e (see the appended fig. 3) : This is somewhat more than 

 half the length of the protopodite and is of about the same type as in the figure of G. W. Muller's 

 just mentioned. It has nine joints; the first joint is not quite so long as the total length of the 

 eight following j oints. Unlike in the C y p r i d i n i d s and H a 1 o c y p r i d s, there is a long natatory 

 l)ristle ventero-medially on each of the firat eight joints (the branch in thought of as pointing 

 forward as in fig, 6. pi. 7, G. W. MULLER, 1894); these bristles are furnished with more or less 

 long natatory hairs along the greater part of their length (they have no spines, unlike in 

 a number of C y p r i d i n i d s) ; the distal part of these bristles is not widened or specifically 

 differentiated in any other way. The bristles on the first to the eighth joints are subequal, 

 about as long as or even somewhat more than twice the length of the protopodite. The end 

 joint has three lu'istles. The ventral one of these three is about two and a half times the length 

 f)f the exopodite; one of the two others is about as long as this branch, the other is about as long 

 as the total length of the 3 — 5 distal joints. The shortest of these three bristles is almost bare, 

 the two others are birnished with rather short natatorv hairs. At the middle of the ii\side tliere 



