184 ' TAGE SKOGSBERG 



more or less clearly in wreaths and are more or less strongly pectinated distaUy. Proximally on 

 the outside of the third masticatory process there is usually a single bristle. The coxale often 

 has dorsally a lamelliform e p i p o d i a 1 appendage, often fine-haired, and distally of 

 this often a single bristle. On the boundary between the protopodite and the endopodite there 

 are often some bristles to be found: one placed just close by the exopodite, one at about the 

 middle of the inside of the endopodite and one on the anterior edge of the latter; sometimes 

 a somewhat larger number of bristles is developed at this place. Exopodite: This branch 

 is most frequently to be found at its original place, distally-laterally on the basale, seldom (in 

 the sub-genus C i/pridmodes) displaced distally. Endopodite: The first joint is generally 

 of moderate length, but very broad and rather strongly compressed laterally-medially (the 

 limb is thought of as turned straight outwards). Its posterior edge is most frequently more 

 or less strongly chitinised distally, often more or less projecting and forming a sort of cutting 

 edge; the shape of this part varies somewhat both indifferent species and within each species, 

 so that it is scarcely suited for the characterization of species. Distally this joint has some 

 bristles both on the anterior and the posterior edge, often two on the anterior and two or three 

 on the posterior. The small end joint is often rather strongly chitinized and armed with a rather 

 large number of bristles. In most of the species of this group that I have had an opportunity of closely 

 investigating these bristles showed such strong agreement both in number and situation that it 

 ought to be possible to carry out a pretty certain homologization of them in the difierent forms. 

 In most species 13 bristles were found, placed as follows: One group, whose bristles (often four 

 in number) form a transverse row, is found on the outside of the joint, somewhat towards the 

 back; its bristles are most frequently of moderate strength and diminish somewhat in length 

 towards the anterior edge of the joint; they are also but weakly or else not at all armed. The 

 other bristles are situated more or less distinctly along the distal edge of the joint and are very 

 different from each other in size and type in the different species; within each species they show, 

 however, a rather great constancy, so that fairly good classificatory characters may be obtained 

 from them. In most species some of them at least are developed into very powerful masticatory 

 bristles. A grou.p of these bristles is placed distally-anteriorly on the joint; it consists most 

 frequently of three bristles. Distally-medially on the joint somewhat behind this group there 

 is another group; it too has in most cases three bristles. Finally, posteriorly-distally on the 

 joint, usually somewhat laterally to the last-mentioned group, there is a third group of three 

 bristles, generally including the most powerful masticatory bristles of this joint. While the first group 

 mentioned is comparatively isolated, the three latter groups are at no great distance from each 

 other, on the contrary they are in most species rather close to each other, sometimes (as, for 

 instance, in the sub-genus Cypridinodes, see below) even so close to each other that I could 

 carry out homologization only with the greatest hesitation. 



Fifth limb*: — A\'ithout sexual dimorphism or at least the dimorphism is extremely 

 weak, scarcely noticeable. — • The protopodite: The first masticatory process is armed 

 with a somewhat varying number of bristles: 5 — 14 (generally 7—9) were found in the species 



* It is lo be noted that in the description, for practical reasons, this limb is always thought of as pointing straight 

 outwards, whereas in the natural position of rest it points obliquely outwards and backwards. 



