EMBETONIO FISSION IN OYOLOSTOMATOUS POLYZOA. 39 



Eeferences. 



1. Barkois, J.— ' Recherohes sur I'Embryol. des Brjozoaires,' Lille, 1877. 



2. Barkois, J. — " Embryogenie des Bryozoaires, Essaie d'une theorie 



generate du devel.," &c., ' Journ. de I'Anat. et de la Physiol.,' xviii, 

 1882, 140. 



3. Bakeois, J. — "Mdm. sur la Metamorphose de quelques Bryozoaires," 



'Ann. Sci. Nat.,' 'Zool.,' 7« s6r., i, 1886, Art. No. 1. 



4. BiGELOW, R. P.—" On Reproduction by Budding in the Discomedus»," 



' Johns Hopkins Univ. Circulars,' xi. No. 97, 1892, 71. 



5. Braem, p. — " Untersuchungen iib. d. Bryozoen d. siissen Wassers," 



Leuckart and Chun's 'Bibliotheca Zoologica,' Heft 6, 1890. 



6. BaooKS, W. K. — "The Life-History of the Hydromedusae," 'Mem. 



Boston Soc. Nat. Hist.,' iii, 1886. 



7. BuscH, W. — ' Beob. iiber Anat. u. Entwick. einiger wirbellosen See- 



thiere,' Berlin, 1851. 



8. Busk, G.— ' Monogr. of the Fossil Polyzoa of the Crag,' Palseont. Soc, 



1859. 



8a. D4VENPOKT, C. B. — " Obs. on Budding in Paludicella and some other 

 Bryozoa," 'Bull. Mus. Comp. Zool. Harvard Coll.,' xxii, No. 1, 1891. 



9. DitlESCH, H. — " Eatwicklungsmechanische Studien," ' Zeits. f. wiss. 



Zool.,' liii, 1892, 160. 



10. Pjbdlee, K. — " Entwicklungsmechanische Stud.an Echinodermeneiern," 



'Festschrift zur Feiet d. fiinfzigjahiigen Doctor- Jubilaums des .... 

 Dr. K.W. von Nageli, &c.,' Zurich, 1891. 



11. GlAKD, A. — " Sur le bourgeonnement des larves d'Astellinm spongi- 



forme Gd. et sur la Pcecilogonie chez les Ascidies composees," 

 ' Comptes Rendus,' Pev., 1891. 



12. GoBTTE, A. — 'Entwickelungsgesch. d. Aurelia aurita u. Cotylorhiza 



tuberculata,' Hamburg and Leipzig, 1887. 



13. Haeckbl, E. — "Zur Entw. d. Siphonophoren,"- 'Naturk. Verb. 



Utrechtsch Genootschap,' 1869. 



14. Haeckel, E. — ' Metagenesis und Hypogenesis von Aurelia aurita,' Jena, 



1881. 



15. Haemee, S. p.— "Sur I'embryogenie des Bryozoaires Bctoproctes," 



' Arch. Zool. Exp. et Gen.,' 2 ser., v, 1887, 443. 



16. Haemeb, S. p.—" On the Origin of the Embryos in the Ovicells of 



Cyclostomatous Polyzoa," ' Proc. Cambridge Phil. Soc," vii, part 2, 

 1890, 48. These ' Studies,' vol. v. 



