THE PLUMTLARID/F,. 



Distribution of American f/eneni of Eleutheroplean Plumuiaridee. 



(The figures in the columns ilenute. (.lie number of .species. ) 



The above table shows clearly the great preponderance of the West Indian region over all others 

 ill its Eleutkeioplenn fauna. The paucity of forms from the South Atlantic and Pacific, though 

 partly due to lack of research in those regions, is nevertheless remarkable. In the Australian 

 region, however, there is a wealth of Plumularida' comparable with that found in the West Indies; 

 but there is only one American species among them. 



KEY TO THE UENERA OF ELEUTHEROPLEAN PLl'MI'LARIANS. 1 



Hydrocladia pinuately disposed, each bearing more 



than one hydrothera I'lumularia. 



Each liearing a single hydrothera ..Monot/ieca. 

 Hydrocladia arranged ill verticils, or scattered 

 on all sides of stem; cienosarc canalicu- 



lated Anieniiularia. 



Co'nosarc uot canaliculated Anl?.innipxin. 



Hydrocladia apparently springing from root stalks, 



divided into iuteruodes Intennella. 



Not divided into interuodes [Acladia.] 



Hydrocladia all springing from upper side of 



branches Monostcechas. 



Hydrocladia replaced by thorny processes on distal 



ends of branches [.IcantheUa.'] 



Hydrocladia bearing a jointed neniatophorons 

 branchlet at base of each hvdrotheca. .. Calcinia. 



Both lateral and mesial nema- 

 tophores, free and present. 



Gonangia not protected by 

 special ramuli or modifica- 

 tions of hydrocladia. 



Gonangia protected by special 

 ramuli or modifications of 

 hydrocladia. 



Some of the nematopbiiivs 

 either fixed or wanting. - 



Hydrocladia branched, some of the branchlets 

 assuming the function of phylactogonia; gonau- 

 gia borne on hydrocladia Sell izotricha. 



Hydrocladia branched, lateral nematophores in 

 more than one pair Diplopteron. 



Hyilrocladia with accessory ramuli; gonangia borne 

 on stem or main branches Polyplumularia. 



Hydrocladia scattered over stem; gouangia pro- 

 tected by symmetrically disposed horny pro- 

 cesses [Sciurt'Ua.~\ 



Hydrocladia on distal portion of branches modified 

 into verticillate, neniatophorous branchlets in- 

 i-losiug gonangia Hippurella. 



Gonaugia borne on special branches and inclosed in 

 verticils of neniatophorous branchlets. Callicarpn. 



Mesial nematophores fixed Hydrothecal margin toothed Gattya. 



Mesial uematop bores fixed Hydro thecal margin entire [Heteroi>loti.] 



Lateral nematophores fixed, borne on long processes Halopleris. 



Lateral iiematopliores wanting [Azygopltm. ] 



Lateral iiematopliores wanting and replaced by naked sarcostyles, mesial nemato- 

 phores monothalamic [Kirchenpauffria.'] 



1 The genera whose names are inclosed in brackets are uot represented in American waters. 



; Under certain conditions specimens will be found from which the nematophores, or the greater fart of tin .in, 

 have been removed by accident, or perhaps on account of the approaching dissolution oftlir colony. The key is, of 

 course, based on the characters of normal spedim-ns. 



