630 TAGE SKOGSBEFiG 



Fifth limb: — Protopodite: The longer of the two tube-bristles on the 

 second endite always seems to be furnished with rather long and stiff secondary bristles at the 

 middle. Endo'podite: Very like that of C. oblonga. In exceptional cases there were in 

 the specimens investigated by me two, not one as is normal in this genus, tube-bristles dorsally 

 of the short, dorsal claw; one of these two tube-bristles was rather short. Exopodite: First 

 joint: This has two medio-ventral bristles, which are in most cases subequal and about as long 

 as the proximal height of this joint, both with short hairs. The proximo-ventral group of bristles 

 has three or four bristles in it; these vary somewhat in length, the longest often being about 

 as long as the medio-ventral ones, the shortest about half as long; one of the longest of these 

 bristles usually has long secondary bristles, the others usually have short hairs. The disto- 

 ventral group of bristles usually contains two or three bristles, all usually with short hairs, the 

 longest in most cases about as long as the medio-ventral bristles, the two others usually consid- 

 erably shorter and weaker. The dorso-lateral bristle is most frequently somewhat shorter 

 than in my fig. 27 of C. symmetrica and is furnished with long hairs; in one specimen 

 I observed on one fifth limb two such bristles situated close together. End joint: The middle 

 claw is in most cases somewhat longer relatively than in my fig. 27 of C. symmetrica; the dorsal 

 bristle is about a third or a quarter shorter than the middle claw. Pilosity: The protopodite 

 and the first exopodite joint are often furnished with sparse hairs. 



Sixth limb: — The two bristles of the endopodite most frequently have 

 short hairs. Exopodite: First joint: The ventral bristles are in most cases relatively 

 shorter than in my fig. 29 of C. symmetrica; most or all of them have short hairs. One of the most 

 distal of these bristles is often absent. The dorso-lateral bristle of this joint usually has long 

 secondary bristles. 



Penis (fig. 12) : — This is somewhat S-shaped ; its distal part is bent ventrally. Somewhat 

 distally of the middle it has from about four to six oblique transverse muscles, distally of which 

 there are no muscles. It has a moderately large and distally rounded copulatory appendage. 



F u r c a : — There is no unpaired bristle behind the claws. 



Rod-shaped organ: — The capitulum, which points forward, reaches with its 

 point to about the point of the first antenna and is about as long as the height of the second 

 joint of this limb; its shape is about the same as in pi. XIII, fig. 20, G. W. MUller, 1906 a; 

 cf. the adjoining fig. 14. 



Upper lip: — The part between the combs on the postero-ventral edge of this 

 lip is in most cases of about the type reproduced in my fig. 37 of C. symmetrica, but slight 

 variation was found. The paragnates are of about the same type as in the species just 

 mentioned. 



Female: — 



Shell: — Length: G. W. MOller gives this (1906a) as: 1,1—2,1 mm. „die groBen 

 Individuen iiber 1,9 ... . stammen aus der Arktis" (the same author, 1912). The specimens 

 Investigated by me had the following lengths: Skager Rak and Cattegat: 2,0 — 2,15 mm.; 

 Lofoten, 1,95 — ^2,25 mm.; Arctic Ocean: 1,8 — 2,2 mm.; Atlantic Ocean: 1,15 — 1,6 mm.; 

 Antarctic Ocean: 1,5 — 1,85 mm. The females from both the Arctic (with Skager Rak and Catte- 



