726 TAGE SKOGSBERG 



Maxilla (see the appended figs. 23 — 26) : — The end joint of the endopodite is rela- 

 tively long, about the same length as in C. horealis. 



Fifth limb: — ■ This is of about the same type as in my fig. 27. P r o t o p o d i t e: 

 The longer of the two tube-bristles on the second endite has long secondary bristles. Endo- 

 podite: One of the three ventral anterior bristles is of about the same length and type as 

 the long bristle on the first endite. The two others are somewhat shorter; one of them has short 

 hairs, the other usually has rather long secondary bristles. On the outside the endopodite is 

 furnished anteriorly with a number of short spines. Exopodite: First joint: The ventero- 

 medial group has two bristles, the proximo-ventral one has four or five bristles and the disto- 

 ventral one three or four bristles. One or two of the proximo-ventral ones and the same number 

 of the disto-ventral ones are usually furnished at the middle with long hairs. This limb is some- 

 times bare, sometimes the protopodite and the first exopodite joint are partly furnished with 

 moderately long hairs. 



Sixth limb (see the appended fig. 29): — The ventral bristle on the end joint has 

 short hairs. 



Seventh limb: — The end joint has spines; see the appended fig. 31. 



Penis: — This is of about the type reproduced in the appended fig. 32. It has about 

 six to eight oblique transverse muscles at the middle, distally of which there are no muscles. 

 The copulatory appendage is well developed and varies somewhat in type; in most cases it is 

 rather wide and rounded as in the figure just mentioned. 



F u r c a (see the appended figs. 33 and 34) : — Behind the claws there is an unpaired 

 short-haired bristle, about as long as the sixth or seventh claw. 



Rod-shaped organ: — • The shaft reaches to about the distal boundary of the 

 second joint of the first antenna or to the point of this limb. The capitulum (see the appended 

 figs. 6 and 7) is of about the type reproduced by G. W. MULLER, about as long as or somewhat 

 shorter than the second joint of the first antenna. 



Upper lip (see the appended figs. 35 — 37) : — The part between the combs on the 

 postero-ventral edge of this lip is only sUghtly concave in the middle. The paragnates 

 are of about the type reproduced in the appended fig. 38. 



Female: ^ 



Shell: — Length: According to G. W. MULLER, 4,1 — 4,4 mm. Of the specimens 

 investigated by me one (abnormal) measured 4,0 mm., 32 were 4,4 — 4,6 mm. and one was 

 4,7 mm. long. Seen from the side it is almost entirely of the same type as the male shell; 

 it differs by having the rostrum somewhat longer and perhaps somewhat straighter and by 

 being in most cases relatively somewhat higher posteriorly. Seen from below it is also 

 of about the same type as in the male, but the anterior part is not or is at least scarcely percept- 

 ibly larger than the posterior part and the side contours are more evenly curved. 



First antenna (see the appended fig. 10) : — The division into joints is fairly distinct. 

 The dorsal bristle on the second joint is about as long as the a — d-bristles and has short hairs. 

 The e-bristle is about twice as long as this limb; it is only slightly sword-shaped distally and 

 its anterior side is bare. The a-b-c-d-bristles are subequal, about a third of the length of the 



