1885.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 399 



vicinity of its attachment. The question suggests itself whether this 

 abnormal position of the oral arm implies a beginning of a fission or a 

 wound in the body of the Cassiopea. There is nothing to throw any 

 light on either of these explanations or to definitely answer either 

 question. 



Family VELELLID^. 

 Velella mutica, Bosc. 



Specimens examined. 



Eataria, sp. (Young Velella or Porpita). 

 Specimens examined. 



Family ABYLID^. 

 Abyla TKiGONA, Quoy and Gaimard. 



(Plate XX.) 

 Specimens examined.* 



* This description is made from a specimen taken outside the areas treated of in the 

 present report. The posterior uectocalyx only is found ia the specimen from Station 

 2352. 



