750 TAGE SKOGSBERCx 



Seventh limb: — The longest end bristle is about a quarter of the length of the 

 shell. The end joint is furnished with short, fine hairs. 



Penis: — This has a marked cv-shape. The part proximally of the contraction is 

 almost as large as the distal part. It is rounded distally. There is no copulatory appendage. 

 For further details see figures 31 and 32. 



Furca (fig. 30): — This has seven claws; the armature of the claws is very weak. 

 Between the first and second claw a rounded, verruciform process seems always to be developed. 

 Behind the claws there is always an unpaired bristle, about as long as or somewhat shorter than 

 the posterior claw. The lamellae are furnished with groups of rather short, stiff hairs, in most 

 cases on both the medial and the lateral sides. 



The r o d - s h a p e d organ is pointed distally (sometimes it has two points) and reaches 

 about as far as the dorso-distal boundary of the third joint of the first antenna (fig. 12). 



Upper lip: — This projects rather decidedly and is rounded anteriorly. It is pro- 

 vided anteriorly with two low, rounded protuberances, one on each side, at some distance 

 from the middle line (one of these protuberances is indicated in the adjoining figure 10), but 

 apart from these it is smooth. The glands of the upper Up open out on two moderately large 

 and somewhat rounded fields, one on each side, at some distance from the middle hne and from 

 the posterior ventral edge of this lip (one of these fields is shown by a weakly undulating line 

 on the adjoining fig. 10). The posterior ventral edge of the upper lip is rounded (see fig. 11); 

 its combs project rather decidedly and are furnished with numerous rather fine hairs. No 

 glands have their exits on these combs. The part between these combs is about as broad as 

 each of the latter and is weakly and uniformly convex. 



The paragnates are of about the type reproduced by me for Conchoecia rotundata, 

 p. 650 above. The chitinous lists behind the lower lip are of quite the same tvpe as is reproduced 

 for Conchoecia symmetrica. 



Female: — 



Shell: — This dift'ers rather considerably from that of the male. Length, 1,10 to 

 1,3 mm. Length : height about 2,3 : 1; length : breadth about 2,75 : 1. Seen from the 

 side (fig. 6), it is elongated, with its greatest height at about the middle and the anterior 

 and posterior parts of about the same size or the posterior part slightly larger than the anterior 

 part. The ventral margin is hke that of the male; the posterior margin, which is somewhat 

 more weakly curved than in the male, forms, together with the dorsal margin, an angle that 

 is rather considerably less than 90°. The posterior dorsal corner is of the same type as in the 

 male, i. e. the right valve is always furnished with a spine, the left valve has in most cases an 

 extremely small spine, which is sometimes quite absent (cf. fig. 8). The rostrum is bent some- 

 what more ventrally than in the male, and is rather narrow and imsymmetrical; the left rostral 

 process is longer than the other and is drawn out distally in a more or less long point; asym- 

 metry varies somewhat; it is seldom more distinct than in the adjoining figure 9, sometimes 

 it is rather weak. The shoulder vault is not distinct. Seen from below (fig. 7) 

 the shell is lentil-shaped, with its greatest breadth at or just behind the middle, the posterior 

 part slightly or not at all larger than the anterior part, with pointed anterior and posterior 



