BUGULA AVICULARIA. 75 



tive sac above supports the pyloric valve ; and beyond this 

 the intestine dilates into a large oval cavity^ extending 

 to the point of exit at the base of the tentacles. 



Altogether the alimentary canal presents a rather cha- 

 racteristic form; while the general appearance of the 

 polypide is affected by the nxdimentary condition of 

 the oesophagus. 



The BugulcB are not unfrequently brightly coloured. 

 They are very widely distributed ; and in B. neritina (the 

 type of the genus as constituted by Oken) they have a 

 cosmopolitan representative, which is to be met with in 

 most seas^. 



BuGULA AVICULARIA, LiuUSeUS. 



Plate X. figs. 1-4. 



Bird's-iiead Coralline, Ellis, Corall. 36, No. 2. pi. xx. figs, a A. 



Seetulaeia AVICULARIA, Limi. Syst. ed. 10, 809. 



Cellaria AVICULARIA, Ell. 8( Sol. Zoopli. 22 : Lamk. An. s. Vert, ed, 2, ii. 



191. 

 BuGi'LA AVICULARIA, OJcoi, Lclirb. Naturg. 90 : Busk, B.M. Cat. i. 45, pi. liii.: 



Alder, North. Cat. 59 (sep.): forma 1, Smitt, (Efvers. K. Vet. 



Akad. F5rhandl. 1867, 289 & 339, pi. xviii. figs. 9, 10, 



12-15. 

 Ceisia AVICULARIA, Lamx. Pol. corall. flex. 141. 

 Cellularia AVICULARIA, Johust. B. Z. ed. 2, 338, pi. Ixiii. figs. 7, 8 : Landsh. 



Pop. Hist. 341, pi. xix. fig. 72. 

 Cellularia avicularis, Eekl, Ann. N. H. ser. 1, xvi. 389: Balyell, Rem. 



An. Scotl. i. 241, pis. xlviii., xlix. 

 Ornitiiopora AVICULARIA, D'Orbigiiy, Pal. Frau9. Terr. Cret. v. 322 1. 



Zoarium bushy; branches flabellate, divided dichoto- 



* " Acamarchis neritina, qui parait maintenant habiter le monde entier, 

 se fixe a la quille des navires et se fait transporter partout" (D'Orbigny, 

 ' Voyage dans rAmerique meridionale,' t. v. 4™« partie, Zoophytes, fig. 10). 



t I do not give Avicella avicularoidcs, Van Ben., as a synonym. He 

 describes the avicularia of his species as having mandibles " cmirtes ct 

 ramassees,'' terms which are not applicable to those of the present form. Tlie 



