80 EUDENDRIIDyE. 



brium, in the walls of which the spermatic mass is deve- 

 loped. Gradually, however, the peduncle lengthens., and 

 a second sperm-sac is formed upon it immediately below 

 the first ; sometimes a third follows below the second ; but 

 this seems to be commonly the limit. This polythalamic 

 structure is a very simple modification of the 

 ordinary gonophore. The female sporosac 

 contains a single ovum, which is more or less 

 encircled by the loop-like spadix (wood- 

 cut, fig. 7). 



According to Agassiz the colour of the polypite some- 

 times differs in the two sexes'*. 



The genus Eudendrium is widely distributed in the 

 European Seas, and has representatives in North America. 

 One of these (E. tenue, A. Agass.) I believe to be identical 

 with a British species, and E. ramosum, according to 

 M'Crady, has been found at Charleston. E. rameum 

 occurs near the North Cape, as well as abundantly on our 

 own shores, and ranges to the Mediterranean. Sars de- 

 scribes a new species (E. pusillum) found near Messina, 

 and Stimpson reports one (E. cinc/ulatum] as occurring at 

 Grand Manan, Bay of Fundy. 



1. E. RAMEUM, Pallas. 



TUBULARIA RAMEA, Pallas, Elencli. 83; Johnst. B. Z. (1st eel.) 117, pi. v. 

 figs. 1, 2 ; Dalyell, Bern. An. of Scotl. i. 50, pis. vi.-x. 



TIIOA SAVIGNYI, Lamx. Expos. Meth. 15. 



TUBULARIA RAMOSA, Johnst. Trans. Newc. Soc. ii. 253, pi. x. 



EUDENDUIUM RAMEUM, JoTinsf. B. Z. (2nd eel.) 45, pi. v. figs. 1, 2; Lands- 

 borough, Pop. Hi.st. B. Z. 107, pi. ii. fig. 5 ; Alder, North. & 

 Durh. Cat. in Trans. Tynes. F. C. iii. 103 ; T. 8. Wright, Ed. 

 New Phil. Journ. (N. S.) for Jan. 1859, pi. ii. figs. 1,2. 



Woodcut, fig. 8. 



ZOOPHYTE tree-like, much and irregularly branched ; MAIN 



* ride his account of E. dispar, N. II. IT. S. vol. iv. p. 288. 



