CHAPTER FIFTH. 



THE GENUS EUDENDRIUM OF EHRENBERG 



S E C T I N I . 



REMAKKS ON THE HYDROIDS REFERRED TO THE GENUS EUDEMJnUM AND THEIR 



FREE MEDUSAE. 



I ASSOCIATE here a number of genera,^ the free medusfe of -which have been 

 supposed to originate from Hydroids belonging to one and the same genus, called 



' References to Eudendrium, Lizzia, Hippocrene, 

 Bougainvillia, and allied genera. The queries 

 express doubts respecting the generic identity 

 of the species quoted. 



Eudendrium Ehr. 



Eudendrium, Ehrenberg (not VanBeneden), (E 

 ramosuni. ::= Tuhularia ramosa Lin. : 

 E. racemosum. ^ Sertularin race- 

 mosa Cavolini), Corallenthiere, 

 Verhdl. Konigl. Akad. Wiss., Ber- 

 lin, 1834, p. 72. 



" Johnston (E. rameum= 7'((ii(/((n« ?-a- 



mea, Pallas ; E. ramosum = Tuhu- 

 laria ramosa, Linn.), British Zoo- 

 phytes, 2d ed., 1847, p. 45. 



" Sars (E. racemosum = Sertularia race- 



inosa, Cavolini), Nyt Mag. for 

 Naturvid., 18.56, p. 154. 



Eudendrium, Alder (E. capillare = E. ranieuni 



[and 1-amosum ?], Johnston), An. 



Mag. Nat. Hist., Nov., 1856, p. .355. 



" Alder (E. rameum, ramosum, and capil- 



lare), Cat. Zooph. North., 1857, p. 13. 



" McCrady (E. ramosum), Proc. Elliot 



Soc, Charleston, S. C, 1858. 

 " Wright (E. rameum), Edinb. New- 



Phil. Jour., 1859, Vol. IX. p. 108. 

 " Wright (E. rameum), An. Mag. Nat. 



Hist., 1861, VIIL p. 125. 

 Corallina tuhularia gracilis, &,• ramosa, axillis ranui- 

 loruni contort is, Ellis, Corallines, 1755, 

 p. 31, PI. XVIL Fig. a. A, (? PI. 

 XVL Fig. a). 

 Tuhularia ramosa, Ellis and Solander, Zoophytes, 

 1786, p. 32. Ovaries placed 

 in a circle round tlie lower 

 part of the lieads. 



