50 H. J. HANSEN. 



aud a lialf times longer than deep ; the distal dorsal seta on 

 the tibia is moderately short ; tlie posterior claw (fig. 5 d) 

 very slender, and considerably shorter than the thiclc anterior 

 claw, the front seta longer than the anterior claw, and 

 proximally exceedingly robnst. (The penultimate pair show 

 a transition stage between the two pairs described.) The 

 first pair of legs (fig. 5 e) with a few long or very long sette 

 on the loAver side of the femur; the tarsus with the distal 

 sett\3 unusually long, the anterior claw (fig. 5/) proportion- 

 ately not slender and feebly curveil, the posterior claw scarcely 

 half as long as the other, slender and moderately curved, the 

 front seta long and very robust. (In the specimen with 

 eleven pairs of legs the last pair resembles the tenth one in 

 the adult described.) 



Cerci (fig. 1 (?). — Of moderate length, but unusually 

 slender, nearly six times longer than deep. They are set 

 with a moderate number of seta?, which increase somewhat in 

 length from the base outwards, and the most distal seta) are 

 a little shorter or a little longer than the depth of the cerci. 

 The terminal area looks upwards, and more or less outwards 

 as well ; it is rather short. The apical seta is wanting in 

 my specimens. 



Length. — The adult and rather contracted specimen is 

 4" 7 mm. 



Variation. — A specimen which measures scarcely 3 mm. 

 in length, but possesses the full number of legs, presents 

 some differences from the form just described. On the two 

 anterior scuta the antero-lateral settc are a good deal shorter, 

 but the long lateral pair are somewhat longer than in the 

 specimen figured. The last pair of legs with the distal dorsal 

 spine on the tibia about as long as the depth of the joint; 

 the tarsus is slender, nearly five times longer than deep, with 

 seven dorsal setae, the anterior somewhat longer and con- 

 spicuously less robust than in the main form ; the cerci (fig. 

 I e) are a little more than five times longer than deep, with 

 the sctic less numerous and conspicuously longer in propor- 

 tion to the cerci; the terminal area is proportionately longer 



