346 



HYDROID^. 



Part IV. 



Eudora Per. and LeS. (not Lesson). 



E. undulosa Per. and LeS.; Cm., Regn. An., 111. ed., PI. 54. fig. 5. 

 — DeWiifs Land (Peron and LeSueur). 

 Proboscidactyla Br. — P. tiavicirrhata Br., PI. 19. — Petropolawsbj 



(Mertens) ; Gulf of Georgia (A. Agassiz). 

 Willia Forhes? (Spelled Willsia by Forbes.) 



W. stellata Forbes, Nak. Med., PI. 1, fig. 1 ; Gosse, Devon., PI. 20, 



figs. 1-5. — Bai/ of Oban and Penzance (Forbes). 

 W. ornata McCr., PI. 9, figs. 9-11. — Charleston Harbor, South Car- 

 olina (McCrady) ; Naushon, Massachuseiis (A. Agassiz). 

 12th Family. Nucleifer.e Less. — Oceanidse Esch. (p. p.), Gcgenb., McCr. 

 Conis Br. — C. mitrata Br., Mem. Acad. St. Petersb., 1838, PI. 2. — 



Bonin Lslands (Mertens). 

 Turris Less. — Oceania (Auct. p. p.).^ — Hydra: Clavula Wnght. 



T. papua Less. ; Eyd. and Soul, Bonite, Zoopli., PI. 2, figs. 1-3. — 



Wttigiou (Lesson). 

 T. digitalis Forbes, Nak. Med., PL 3, fig. 1. — Medusa digitalis 

 0. F. 31idl. — Melicerta digitalis Per. and LeS. — Eirene dig- 

 italis Fsch. — Turris borealis Less. — German Ocean (0. F. Mid- 

 ler); British Seas (Forbes). 

 T. neglecta Less. ; Forbes, Nak. Med., PI. 3, fig. 2. — Clavula Gossii 

 Wright, Edinb. Phil. Journ., 1859, Vol. X. p. 105; Gosse, 

 Devon., PI. 13, figs. Q-IQ. — British Seas (Forbes). 



' Dedicated to Dr. Will, by Prof. Forbes, and 

 should, therefore, be written Willia, and not Willsia. 



^ As characterized by the French naturalists, 

 the genus Oceania does not at all correspond to 

 the genus Oceania of Forbes and the modern Ger- 

 man zoologists. Eschscholtz does not seem to have 

 observed a single species himself, and adopts nearly 

 the same limits for it as Peron and LeSueur. So 

 does also DeBlainville. Moreover, Peron and Le- 

 Sueur unite the Oceanian of modern writers with 

 the species which Lesson has i-etained in this genus, 

 after restricting it so as to exclude the Forskalian 

 species. The result of all this is, that the Les- 

 sonian Oceania; are united with some of the ^Eqiio- 

 ridse of Eschscholtz, even though Eschscholtz had 

 already proposed the name Oceanidas for a family 

 which is entirely different from the ^quoridse. As 

 there are types of several distinct families united 



at the outset under the name Oceania, by Peron 

 and LeSueur, the question now is, for which 

 that name ought to be retained, if retained at all. 

 Lesson perceived the confusion, and took the first 

 steps towards remedying it ; but he did it very 

 imperfectly. I see, however, no reason why the 

 name NucleiferiE, which he proposed for the old 

 Forskalian type, should not be retained for this 

 family, and the name Oceania and Oceanida^ ap- 

 plied specially, as Lesson has done, to Oceania 

 phosphorica, which Peron and LeSueur place in 

 the first section of the genus. This section cor- 

 responds to the genus Thaumantias of modern 

 writers. The second section answers to the genus 

 Oceania, as limited by Forbes ; but since Lesson 

 had previously divided the genus in a different 

 way, Forbes' arrangement cannot be adoj)t<'d. The 

 third section corresponds to Geryonopsis. 



