- i; — 



not give the length of his spécimens, and his représentation of 

 the antennula is defective, but the front part of the carapace is 

 so much expanded and covers so much of the eye-stalks that I 

 — at least provisionally — must consider E. brevis as distinct 

 from E. diomedeœ. 



Euphausia gibba, G. O. Sars 



Euphausia gibba,G. O. Sars, op. cit., p. 91, Pl. xvi, figs. 1-8. 

 — pseudogibba, Ortmann, op. cit., p. 12, Pl. 1, fig. 6. 



In my former paper I referred a large number of spécimens 

 from 12 stations to E . pseudogibba, Ortm., being sure that this 

 référence was correct, but not investigating the question whether 

 E. pseudogibba can be maintained as a species distinct from 

 E. gibba, G. O. Sars. The Copenhagen Muséum possesses a 

 large material from the Atlantic, the Indian Océan, etc., and 

 I have now arrived at the resuit that the two species are iden- 

 tical. Sars has drawn the sixth abdominal segment a little too 

 long; the process from the end of first antennular joint varies a 

 little in shape, being sometimes as described by Ortmann, but 

 in other spécimens with a small or nearly rudimentary tooth 

 at the base on the outer side, as the right antennula in Sars' 

 fig. 2 (while the process of the left antennula in the same figure 

 is erroneous). The other différences mentioned by Ortmann are 

 of no value. 



Genus THYSANOPODA, H. Milne-Edw. 



Numerous species belonging to this genus live in the 

 Atlantic Océan. In my former paper I enumerated 10, 5 of 

 which were described as new; to day I am able to add 2 further 

 species. While several of thèse 12 forms are very easy to 

 distinguish and détermine with absolute certainty, others are 

 rather difficult : the descriptions and figures hitherto given of 

 some of the species inhabiting the Atlantic or the Pacific are 

 scarcely sufficient for récognition with absolute certainty. 



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