28 G. O. Sars. 



PI. II. 



Apus trachyaspis, G. O. Sars. 



Fig. 1. Adult female, dorsal view, magnified about 3 dia- 

 meters. 

 » 2. Posterior part of body, ventral view, showing the 

 extent of the caudal part (caudal filaments not fully 

 drawn). 



Streptocephaliis Purcelli, G. O. Sars. 



Fig, 3. A very large male specimen, viewed from right 



side, magnified about 7 diameters. 

 » 4. Right prehensile antenna, viewed from the outer 



surface. 

 » 5. Extremity of tail, with the caudal rami, dorsal view. 



Streptoceplialus Dregei, G. O. Sars. 



Fig. 6. Adult male, viewed from left side, and represented 

 in the natural attitude of the animal, the belly 

 turned upwards; magnified about 8 diameters. 



» 7. Outer part of left prehensile antenna, viewed from 

 the inner side; magnified about 16 diameters. 



» 8. Leg of 6th pair. 



» 9. Part of terminal lobe of endopodite of same leg,, 

 more highly magnified. 



» 10. Extremity of tail, with the caudal rami, dorsal view» 



