Oockerell — Nomenclature of the Hydromedusse. . 81 



Order LEPTOMEDUSjE. 

 Fam. Cannotid/E. 



Subf. Melicertin^e. 



Tetranema Haeck. 



eucopium Haeck. 

 Laodicea Less. 



cruciata (Forsk.). 

 Melicer'um Oken. 



campantda Oken . 

 Melicertissa Haeck. 



clavigera Haeck. 

 Orchistoma Haeck. 



pileus (Less.); syn. steenstrupii 

 Haeck . 

 Timoides H. B. Bigelow. 



agassizii H. B. Bigelow. 



Subf. POLYORCHIDIN^. 



Staurodiscus Haeck. 



tetrastaurus Haeck. 

 Ptychogena A. Ag. 



lactea A. Ag. 

 Poly orchis A. Ag. 



penicillata (Eschsch.). 

 Scrippsia Torrey. 



pacific, a Torrey. 

 Spirocodon Haeck. 



saltatrix Haeck. 



Subf. Cannotin^;. 



Cannota Haeck. 



dodecantha Haeck. 

 Cuvieria Per. 



carisochroma Per. 

 Dichotomia Brooks. 



cannoides Brooks. 

 Dipleurosoma Axel Boeck. 



typicum Axel Boeck. 

 Toxorchis Haeck. 



arcuatvs Haeck. 

 Netocertoides Mayer. 



brachiatum Mayer. 



