— 4ö - 



T. macrura as interpreted by me than with T. vicina, and 

 the latter species in more fragile than T. macrura and 

 most or all thoracic legs are most frequently lost. The 

 statements of localities for T. macrura in the literature 



from the « Challenger » to 1910 are unreliable, because it 

 is impossible to decide whether the specimens seen belong 

 to T. vicina or to T. macrura ; the only exceptions are a 

 few of the « Discovery » localities enumerated by Tatter- 

 sall (77), as it is certain that his specimen measuring 28 mm. 

 from lat 72 0 2g 1 27" S., long. 168 0 5f 46" E. belongs to 

 T. macrura, that his specimens seen by me from lat. 

 6i° 1 3 1/2 1 S., long. 1 73° 33 1 E. are T. vicina, while in all 

 probability at least some of his specimens from the winter- 

 quarters of the « Discovery » and from his two first stations 

 from the journey belong to T. macrura ; besides his 

 Fig. 1 1 on Pl. m represents the copulatory organ of 

 T. macrura. 



Rostrum is a small, very short triangle much broader 

 than long and badly defined. First and second pairs of 

 legs very elongate, completely similar and showing in the 

 main the same shape and furniture as first pair in a long- 

 legged Thysanoëssa. The remaining legs and all other 

 characters as in Thysanoëssa, 



Fig. 17. Thy s a n o es sa 

 macrura G. O. S. 

 Inner and median 

 lobe of left copu- 

 latory organ, from 

 behind. 



Tessarabrachion n. gen. 



