420 W. K. BROOKS ON THE LIFE -HISTORY 



rection as that of the Siphonophores is in another. The Cunina colonies have resem- 

 blance with both fixed hydroids and Siphonophora, but have not departed as widely as 

 either from the normal method in their older larval and adult condition" (p. 305). 



Section TIL List of References. 



1. Agassiz, Alexander. Review of Haectel's "System der Medusen: " Amer. 



Journ. of Science, xix, March, 1880, p. 245. 



2. AGASsrz, Alexander. 1ST. A. Acalephse: Illustrated Catalogue of the Mus. Comp. 



Zool., Part II, 1865. 



3. Allman, J. G. Ann. and Mag. Nat. Hist., Nov. 1859. 



4. Allman, J. G. A Monograph of the G3 r mnoblastic Tubularian Hydroids: Ray 



Soc, London, 1871-72. 



5. Allman, J. G. On the Anatomy and Physiology of Cordylophora : Phil. Trans. 



Royal Soc. London, 1855, 143, pp. 307-384 > Arch. f. Naturgcs., xxn, 1850, 414. 

 0. Allman, J. G. Notes on the Hydroid a, Part I, Syncorynne pulchella; Part II, 

 The Production of an _ZEginidian by Gemmation, fromGeryonia: Ann. and Mag. 

 Hist., 1805, xv, pp. 405-474 > Arch. f. Naturgeseh., 32, p. 90. 



7. Allman, J. G. Report on the present state of our knowledge of the reproductive 



system in the Hydroida: Rep. British Assoc, 1803, pp. 351-429. 



8. v. Beneden, P. J. Memoire sur les Campanulaires de la cote d' Ostende, consid- 



ered sons le rapport physiologique, embryologique et zoologique: NouveauxMe- 

 moires de lAcademie Royale de Belgique, xvn, 1843, p. 29. 



9. Boiim, R. Helgolander Leptomedusa;: Jen. Zeit,, xn, 1874, p. 08. 



10. Brooks, W. K. Notes on the Medusa; of Beaufort, N. C: Studies from the Biol. 



Lab. Johns Hopkins Univ., July, 1883, pp. 404-475. 



11. Brooks, TV. K. On the Life-History of Eutima and on radial and bilateral sym- 



metry in Hydroids: Zool. Anzeiger, vn, Dec. 29, 1884, p. 184. 



12. Brooks, TV. K. On the Origin of Alternation of Generations in the Hydrome- 



dusse: Johns Hopkins University Circulars, II, 22, April, 1883, p. 73. 



13. Claparede, Ed. Beobachtungen fiber Anat. und Entwickclungsgeschichte wir- 



beloserThiere an den Euiste der Normandie. Leipzig, 1803. 

 11. Claus, C. DieEntwickelung des_ZEquoriden-Eies: Zoologischer Anzeiger, 1882, 

 p. 284. 



15. Claus, C. Ueber Jlalistemma tergestinum, n. sp. nebst Bemerkungen fiber den 

 feineren Ban der Physopheridse: Arbeiten aus clem Zoologischen Inst, der Univ. 

 Wein, und Zool. Station in Triest, I, 1. 



10. Claus, C. Ueber Tetrapteron (Tetraplatia) volitans: Arch. f. mikr. Anat., xv, 

 349. 



17. Claus, C. Grundziige der Zoologie. 1882, p. 483. 



18. Conn, II. TV. Development of Tubularia cristata: Zool. Anz. 



