256 TAGE SKOGSBERG 



Bristles nos. 1, 2 and 4 are rather strongly pectinated distally; on the two latter ones the points 

 seem, however, to be always smooth. Bristles nos. 3 and 5 are finely serrated distally. Bristles 

 nos. 6 and 7 are bent somewhat into an angle distally of the middle and very strongly pectinated 

 distally, especially the latter one. The distal chitinous tooth of the protopodite is of moderate 

 length, and irregular in form, varying to some extent. Epipodial plate: This has 

 from about fifty-five to sixty bristles, all with long hairs almost right out to the points. The 

 exopodite is five-jointed (fig. 22): First joint: The main tooth has seven constituent teeth 

 all well defined proximally; the secondary teeth on the latter are of about the same type as is 

 reproduced in the adjoining figure, but there is, however, some variation. The bristle near the 

 main tooth on the posterior side of the joint is about as long as the anterior constituent tooth 

 of the main tooth and is famished at the middle with a wreath of long, stiff secondary bristles 

 and a few secondary spines; distally it is bare. On the anterior side of this joint there are 

 usually four bristles; sometimes, however, five or six were found. Of these four bristles three 

 are situated in a close row near the main tooth, the fourth at a short distance from these three, 

 farther out on the joint. The two nearest the main tooth are of about the same type as each 

 other, subequal, rather long and powerful, strongly pectinated distally and furnished at the 

 middle with a number of long, stiff secondary bristles. The two others, of the same type as 

 each other, are subequal, somewhat shorter than the two former ones, and have at the middle 

 long and rather soft secondary bristles, and short, fine hairs distally. In those cases where 

 a greater nvimber of bristles were found on this joint, the extra bristles were of the same type 

 as the two last-mentioned bristles and were situated between these. Second exopodite joint: 

 This has four or five, usually four, rather powerful a-bristles, equipped rathfer strongly, eight 

 b-bristles and one c- and one d-bristle. The c-bristle is of moderate length, either with short 

 hairs or with short hairs distally and furnished at the middle with some long hairs. 

 The d-bristle is of about the same type and length as the outer anterior bristle on the first 

 exopodite joint. The inner and outer lobes of the third joint are rather small. The inner lobe is 

 furnished distally with two or three rather strong and moderately long bristles, with short hairs 

 and somewhat different in length from each other. Posteriorly-proximally there is on this 

 lobe a moderately long bristle, with long, soft hairs at the middle and short ones distally. The 

 outer lobe of this joint has two moderately long bristles distally; these are either both of the 

 same type, with long hairs at the middle and short ones distally or else one of them is of this 

 type and the other has only short hairs. On one specimen three distal bristles were found 

 on this lobe on the limb of one side. The fourth exopodite joint, which is rather large and square, 

 has distally and inwards four or five rather short and weak bristles of somewhat different lengths 

 and with short, fine hairs, and somewhat proximally of these there is a group of two or three 

 similar bristles; the hairs on the latter bristles are, however, somewtat stronger 

 than those of the former. The end joint is quite small, fixed distally and outwards on the 

 preceding joint, and is moved by special muscles. It has two or three, usually two, distal 

 bristles of moderate lengths with short hairs. Pilosity: The outer lobe of the third exopodite 

 j(jiiit and the two distal exopodite joints are partly furnished with fine hairs, placed close together. 

 The (>n(l joint has short, stiff hairs distally. 



