plumes they form the "Knieformige Ausftiegung an der 

 Basis", as stated toy Nordmann (p*122) and portrayed 

 in nis magnified figure,and which according to our 

 interpretation shows that the feather plumes on his 

 speeimen, which he said were only "ausnahmsweise ge- 

 spalten",in time would all oecome ftranched. 



First then we may call attention to the faet that 

 many or the plumes usua^ly toecome shriveled or fall 

 off ,and are replaced. with new ones,which grow ©ut as 

 "branches from the old toase or come directly from ths 

 axis of the aTDdomen,,and frequently with a more ad- 

 vameed age plumés al so grow out from the adjacent 

 portions of the do dy, so that two,three,or more of 

 the plumes are attached at the sides of the sex 

 openings and conceal them. In such a new growth 

 the difference in nuurt) er for one portion has its 

 origin. To Nordmann's description and figure 

 of the four pairs of swimming legs we have to add, 

 as we have shown in our f igures,that. in reality they 

 are more than rudimentary ,since part of them show a 

 division into two raml and segmentation of each rami; 

 af ter careful removal of the overlying slime, and the« 

 al so oear set ae. However we are unwilling t® 

 assign to these appendages,or to the similar ones ir 



