496 



Specimen no. 5. Right mandible 



Left 



„ 6. Riglit 



Left 



TAGE SKOGSBERG 



7 bristles in a distinct lower row. 



5 ,. ,, ,. ., upper ,. 



1 bristle above bristle no. 5 of the latter row. 



2 bristles close to the main bristle b. 



1 bristle between the main bristles a and b. 



7 bristles in a distinct lower row. 



6 M ,, „ „ upper „ 



3 .. inside the main bristle b. 



1 bristle between the main bristle a and b. 



7 bristles in a distinct lower row. 

 7 ,, „ „ ,, upper „ 



1 bristle above bristle no. 3 of the latter row, 

 1 .. close to the main bristle b. 



7 bristles in a distinct lower row 



,, „ ,, upper ,, 

 inside the main bristle b. 



The end claw very powerful, about as long as the anterior side of the second endopodite 

 joint, finely pectinated. 



Maxilla (fig. 8): — P r o t o p (j d i t e: Tlie distal endite is armed with three bristles, 

 the middle one of which is somewhat shorter than the other two. The dorso-proximal bristle 

 is moderately long. The basale has one ventral bristle, of about the same length as the dor o- 

 proximal bristle and with the short ventero-distal bristle developed. In addition this joint has 

 one relatively long dorso-distal bristle, of about the same length as the postero-distal bristle 

 of the first endopodite joint. Endopodite: The postero-distal bristle of the first joint 

 is somewhat shorter than the bristle of the end joint. 



Sixth limb (fig. 9) : — The posterior edge is straight or sometimes even weakly 

 concave; the posterior ventral corner is unusually sharply defined, but is rounded. This limb 

 has 21 — 24 jjosterior and two anterior ventral bristles. Two bristles are developed on the 

 anterior edge. 



Seventh limb (fig. 10): — This is very like this appendage in the preceding species; 

 on one specimen thirteen cleaning bristles were observed on the limb of one side. Each end 

 comb has 12 — 14 teeth. The teeth have a somewhat varying number of secondary teeth, some- 

 times as in fig. 8 of /I. Mulleri var. longiseta, sometimes as described for the tyjie species of this form. 



F u r c a: — This has nine claws; only in one specimen were ten claws observed on one 

 lamella. The six or seven anterior of these claws may be called main claws. The two anterior 

 nrain claws have no basal ventral teeth. The secondary claws are more or less distinctly annulated. 



The 1 a t e r a 1 eyes and the median eye are about the same as those of the 

 preceding species. 



The m a 1 v is unknown. 



