368 HYDROID^. Part IV. 



Haplorhiza Ag. — Physopliora Q. and G. 



H. alba Ag. — Physophora alba Q. and G., Zool. Astr., PI. 1, figs. 1-9. 

 — Sotdhern Atlantic (Quoy and Gaimard). 

 Discolabe Esch. — Stephanospira Gegenb. — Rhizopliysa Q. and G. — 

 Rhodophysa DeBl. 

 D. mediterranea Esch. — Rhizopliysa discoidea Q. and G. ; Ann. Sc. 

 Nat, Vol. X. PI. 5; Zool. Astrol., PL 1, figs. 22-24. — Rho- 

 dophysa discoidea DeBl. — Stephanospira insignis Gegenb., Nene 

 Beitr., PI. 33. — Mediterranean (Quoy and Gaimard). 

 Angela Less. 



A. cytherea Less., Acal., PI. 9, fig. 1. — Senegal (Rang).? 

 3d Family. Agalmid^e Br} — Agalmae Less. — Stephanomite Less. — Stephano- 

 midsB Leiick., IIuxl. 

 Agalma Esch. (non Koll, LeucJc, Vogt). — Pontocardia Less.1 



A. Okenii Esch., Acal., PI. 13, fig. 1. — North Pacific (Eschscholtz). 

 Crystallomia Dana. 



Cr. polygonata Dana, Mem. Amer. Acad., Vol. VI. p. 459, PI. 1. — 

 I'acific Ocean, 30° N. Lat, and 179° E. Long. (Dana). 

 Temnophysa Ag. — Stephanomia Q. and G. 



T. alveolata Ag. — Stephanomia alveolata Q. and G., Zool. Astr., 

 PI. 3, figs. 19-23.— 0/* Cape Verd (Quoy and Gaimard). 

 Sphyrophysa Ag. — Physophora Q. and G. — Agalma Htixl. (p. p.). 

 Sph. intermedia Ag. — Physojihora intermedia Q. and G., Astr., PI. 1, 



figs. 10-18. — Atlantic Ocean, 7° JV. Lat. (Quoy and Gaimard). 

 Sph. brevis Ag. — Agalma breve Huxl, PI. 7. — Origin not stated. 

 Stephanomia Per. and LeS.; Huxl. (non 3Iilne-Edw.\ 



St. amphitritis Per. and LeS., Voy. Terres Austr., PI. 29, fig. 5 ; 

 Huxl., PI. 6. — Australia, Pacific (Peron and LeSueur). 



^ Upon a closer comparison of the genera referred not be overlooked in this connection, that Agalma 



to this family, it will appear that the true Agal- Esch. is not generically identical with the European 



midie, of which the genus Agalma Esch. is the type, species generally referred to this genus, while Chrys- 



may form a distinct family, including also the genera tallomia Dana, and Temnophysa Ag., are closely re- 



Chrystallomia and Temnophysa, characterized by the lated to it. Again, Quoy and Gaimard have figured 



wedge-shaped secondary actinal Hydras ; while the several Cuneolariaj, under the names of Stephanomia 



Stephenomiadaj, including Stephenomia, Agalmopsis, triangularis, etc., which exhibit a totally different 



and Forskalia, may be separated on the ground of combination of their sterile Medusie. Phyllophysa 



the thin, flat, secondary actinal Hydrie ; and the may belong to the true Stephenomiae, or form another 



Chamissonidre Ag., restricted to the type of Cuneo- family by itself. The decision of this questior 



laria, the sterile abactinal Medusie of which, resem- must depend upon the structure of the secondary 



ble the actinal ones of the true Agalmidoe. It should Hydra which are not satisfactorily represented. 



