290 TAGE SKOGSBERG 



long and powerful, the middle one being somewhat longer than the two others; they are furnished 

 at the middle with from two to five wreaths of long, stiff secondary bristles and are rather strongly 

 pectinated distally. Of the two bristles in the posterior group the anterior one is generally 

 somewhat shorter than the posterior one in the anterior group, powerful, furnished at the middle 

 with a few wreaths of long, stifi secondary bristles, and very strongly pectinated distally. The 

 posterior bristle is considerably shorter, usually rather weakly pectinated distally and furnished 

 at the middle with a wreath of long, stiff secondary bristles. Of the five inner bristles on the 

 second endite (fig. 2(»), all rather powerful and moderately long, all except the middle one have 

 one or more wreaths of long, stiff secondary bristles at the middle. Bristles nos. 1, 2 and 3, 

 counting from the anterior side of the limb, are rather strongly pectinated distally, nos. 4 and 5 

 are somewhat angular and very powerfully pectinated distally. The single bristle on the anterior 

 side of this endite is very short and weak and has short, fine hairs or is almost bare. Third 

 endite (fig. 21): All the seven bristles of this process are rather long, except no. 6, counting 

 from the anterior side of the limb, which is relatively short; no. 5 is also a good deal shorter 

 than the others, but not so short, however, as no. 6. Of these bristles no. 1 is furnished 

 proximally of the middle with one or a few wreaths of rather long, stiff secondary bristles and 

 bristle no. 7 also has a few such secondary bristles at the middle (sometimes they are absent 

 in the latter bristle; perhaps broken off?); the other bristles, on the other hand, have no such 

 secondary bristles. Bristle no. 1 is rather weakly pectinated, bristles nos. 2, 3, 4 and 5 have 

 rather strong pectination distally; bristles nos. 6 and 7 are somewhat angular distally and very 

 strongly pectinated. The distal chitinous spine of the protopodite is rather long, narrow and 

 bent. Epipodial plate: This has about 55 bristles, all with long hairs, their points 

 being, however, bare. Exopodite: First joint: The main tooth (fig. 22) has seven constituent 

 teeth all well defined proximally, whose secondary teeth are usually of the type reproduced in 

 the adjoining figure. The bristle close to the main tooth on the posterior side of this joint 

 is rather short, with sparse, short hairs. On the anterior side of the joint, near the main tooth, 

 there are four rather powerful bristles, arranged in a close row, the one nearest to the main 

 tooth jjeing rather long, the rest decreasing rather rapidly in length the farther towards the 

 outside of the joint they are situated. The two longer ones of them are rather strongly pectinated 

 distally, but usually have no long, stiff secondary bristles, the two shorter ones are weakly 

 pectinated distally and usually have a wreath of long, stiff secondary bristles at the middle. 

 The second joint has four a-bristles. Of these the three larger ones are of about the type that 

 has been reproduced in fig. 23 of C. ( Siphonostra) spinifera, very powerful and furnished with 

 very strong but rather few secondary teeth; the number and strength of the secondary teeth 

 of these bristles seem, however, to be subject to rather great variation. The smallest a-bristle, 

 the posterior one, is quite short and rather weak, usually bare but sometimes, however, furnished 

 with some relatively coarse secondary teeth. There are also seven or eight b-bristles; only in 

 one specimen was tlie latter number observed on the limb of one side; these bristles are moderately 

 strong and of about the tyj)e reproduced in fig.22 of C. ( Vargula) norvegica. This joint has, in addition, 

 one c- and one d-hristle, subequal and somewhat shorter than the longest b-bristles; the c-bristle 

 has shoit hairs, the d-bristle has long, fine hairs at the middle and short hairs distally or is almost 



