406 TAGE SKOGSnEHG 



First antenna: — ■ The sensory bristle of the fifth joint has seven sensorial fila- 

 ments. Its end joint has seven bristles, as both the d- and the e-bristle are well developed (the 

 d-bristle is, however, distinctly weaker than the e-bristle). 



Mandible: — Protopodite: First joint: The rod-shaped process of the endite has 

 three or four short, powerful spines distally. Second joint: The backward pointing process: 

 The triaena bristles have relatively numerous (:> — 15 pairs) secondary spines proximally of tlie 

 distal pair of spines. Two dwarf bristles are developed on this process. On the middle 

 of the dorsal side of this joint there are a number of bristles. Endopodite: The second 

 joint has from two to four proximal bristles and one long, narrow bristle, with short, 

 tine hairs, between the b- and c- main bristles. 



Seventh limb: — This has rather numerous cleaning bristles. The teeth of the 

 end combs are finely and evenly pectinated. 



The m e d i a n e y e is bare. 



The m a 1 e is unknown. 



To this group belong — at least with complete certainty — only two of all the species so 

 far described; these are described by me below: 



A. quinquesetae and 



,, sfinifera. 



For A. mistralis, G. S. Brady, 1890, cf. remark under A. sfinifera, p. 483 below. 



Mulleri group: 



Female: — Shell: — Seen from the side, this is rather high and short, somewhat 

 pear-shaped, with the posterior part rather strikingly larger than the anterior one. 



First antenna: — The sensory bristle of the fifth joint has six sensorial filaments. 

 Its end joint has only six bristles, as of the d- and e-bristles only the latter is well developed, 

 the former being represented by a very small verruciform process. 



Mandible: — Protopodite: First joint: The rod-shaped process of the endite 

 is furnished distally with three short, fine points. Second joint: The triaena bristles of the 

 backward pointing process have rather few (from one to six pairs) of secondary spines 

 proximally of the distal pair of spines. Only one dwarf bristle is developed on this 

 process. There are no bristles at oil on the middle of the dorsal side of this joint. Endopodite: 

 The second joint has one proximal bristle and one long, narrow bristle, with short, fine hairs, 

 between the b- and c-main bristles. 



Seventh limb: — This has twelve cleaning bristles, six of which are situated near 

 the point of the limb, three on each side and six somewhat proximally of these. The teeth of 

 the end combs are variouslv equipped, the most distal oii(>s having considerably stronger ami 

 fewer secondary teeth than the proximal ones. 



The m e d i a n e y e has short, fine hairs. 



The males are practically unknown. According to a statement of (!. S. BiiADV's. 

 however, at least one species has abundant sensorial filaments on the sensory bristle of the tittli 

 joint of the first antenna. 



The following species of those investigated by me belong to this grou]): 



