1898-99. | THE MESENTERIAL FILAMENTS IN ZOANTHUS. SOCIATUS. 403 
surely we may meet with variations in the origin of the glandular streaks 
in the Anthozoa. H. V. Wilson may be quite correct in maintaining 
an ectodermal origin for the glandular streaks of the first four mesen- 
teries of MJanicina (1888), and altogether wrong when he extends this 
origin to the streaks of the later formed mesenteries. 
I would conclude, from my own observations, that the ciliated bands 
are, probably in all cases, ectodermal, and that, in some mesenteries at 
least, the glandular streaks are endodermal; yet, I am prepared to 
accept as correct the ectodermal origin of the glandular streak on other 
mesenteries. It is to be understood that I use the terms ectodermal 
and endodermal here merely for convenience, and not as expressing a 
definite homology. 
REFERENCES. 
1809—Spi1x.—Mémoire pour servir a l’histoire de |’Asterias rubens Linn., del 'Actinia 
coriacea Cuv., etc.—Azn. Mus. a Hist. Nat. Paris, XI11., 809. 
1817—LeEsuEuR, C. A.—Observations on several species of Actinians.—/ourn. Acad. Nat. 
Sct. Philadelphia, 1., 1817. 
1829—Rapp, W.—Ueber die Polypen im Allgemeinen und die Actinien insbesondere.— 
Weimar, 1829. 
1837—TEALE, J. P.—On the Anatomy of Actinia coriacea.—TZyvrans. Philosoph. Soc. 
Eecds, We 1337. 
1841—LEUCKART.—Ueber den Bau der Actinien und Lucernarier.—Frey and Leuckart’s 
Bettrige sur Kenntniss wirbelloser Thiere, 1841. 
1842—ERDL, M.—Beitrage zur Anatomie der Actinien.—-J/iiller’s Archiv., 1842. 
1846—Dana, J. D.—Zoophytes.—U.S. Exploring Expedition, Philadelphia, 1846. 
1851—HOLLARD, H.—Monographie anatomique du genre Actinia.—Azz. Scz. Nat. (3) 
XV., 1851. 
1852—SCHMARDA, L. K.—Zur Naturgeschichte der Adria.—Denkschr. Wiener Akad., IV., 
1852. 
1854—HAIME, J.—Observations sur quelques points de l’organisation des Actinies.— 
Comptes Rendus Acad. Sct., XXXIX., 1854. 
1858—THORELL, T.—Om den inre byggnaden af Actinia plumosa Miill.—Ofvers af K. 
Vet. Akad. Forh., 1858. 
1860—GoOssE, P. H.—Actinologia Britannica, Zondon, 1860. 
1869—VERRILL, A. E.—Review of the Corals and Polyps of the West Coast of America. 
—Trans. Conn. Acad.,1., 1869. 
1877—ANDRES, A.—On a new species of Zoantharia Malacodermata.—Quwart, Journ. 
Micr, Sct., XVII., 1877. 
1877—VON HEIDER, A.—Sagartia troglodytes Gosse, ein Beitrag zur Anatomie der 
Actinien.—Sztzungzber, K. Acad. Wien., LXXV., 1877. 
