390 TAGE SKOGSBERG 



outer lobe has two subequal bristles of moderate length and strength, sometimes furnished with 

 some wreaths of long, stiff secondary bristles, sometimes with dense, long, soft hairs along the 

 greater part of their length, and with short hairs distally. The end joint is moderately 

 large and has in most cases six, sometimes seven, bristles distally. These are somewhat different 

 in length and all moderately long and strong; at the middle they have one or more wreaths 

 of long, stiff secondary bristles, distally they are finely pectinated. Variation was observed 

 with regard to the length and equipment of the bristles, but this was rather slight. The end 

 joint of the exopodite is partly furnished with soft hairs, especially on the outside. 



Sixth limb: - — P r o t o j) o d i t e: The first endite has two rather short medial 

 bristles and one moderately long and strong distal bristle; the medial bristles have soft hairs, 

 the distal bristle has two or three wreaths of long, stiff secondary bristles placed obliquely, 

 continuing in most cases right to the point of the bristle. The second endite has one medial 

 bristle and three, exceptionally four, distal bristles. The third endite has one medial bristle 

 and seven to nine distal bristles. The endite on the first exopodite joint has one, rarely 

 two, medial bristles and seven to nine distal bristles. The medial bristles on the three last- 

 mentioned endites are moderately long, in most cases with long, soft hairs at the middle or 

 sometimes with rather stiff, long secondary bristles; distally they are bare or finely pectinated. 

 The distal bristles on these processes are of slightly different types, subequal or differing rather 

 slightly in length, moderately long and strong; all or almost all of them are furnished at the 

 middle with long, stiff secondary bristles and have moderately strong pectination distally. 

 The length, strength and equipment of these bristles are subject to some, though only rather 

 slight, variation. The e p i j) o d i a 1 appendage of the protopodite is represented by 

 four, very rarely three or five, short bristles with soft long hairs. The second joint of the exo- 

 podite is about twice as broad as it is long; distally it has twenty to thirty bristles differing 

 somewhat in length. This joint has fine, short hairs both on the medial and on the lateral side; 

 hairs may also be observed on the protopodite. 



Seventh limb (fig. 16): — This is of moderate length, being a little more than 

 half the length of the shell (in some specimens with shells about 3 mm. long this appendage 

 was from 1,7 to 1,9 mm. long). Cleaning bristles: Situated close together distally there are 

 from six to nine dorsal and four to five ventral bristles; proximally of these there are from nine 

 to thirteen dorsal and seven to twelve ventral bristles scattered irregularly. These bristles are 

 of moderate and of somewhat different lengths, varying somewhat both from individual to indi- 

 vidual and on the right and left limbs of the same individual. They are furnished with from three 

 to nine bells cut off transversally distally; the tongue of the distal bell is also cut off rather 

 transversally ; proximally to the bells there are scattered irregularly on the cleaning bristles 

 a moderate or rather small number of rather weak secondary spines. The end comb consists 

 of about seven to nine moderately long teeth, decreasing somewhat in length the more proximally 

 they are situated. These teeth, some of which are reproduced in figs. 17 and 18, are furnished 

 proximally with from one to three rather strong secondary teeth on each side; in addition they 

 are provided on l)oth sides with thin wing-like processes, which often continue with a free point 

 to some distance beyond the central point, which is often well-rounded, of the tooth (fig. 17); 



