LITERATURE OF THE CTENOPHORA 23 



branched papillae. Tentacles and tentacle sheaths absent. The meridional 

 canals unite with the stomodseal canals in the region of the mouth and 

 send out diverticula, which anastomose to form a peripheral network of 

 canals extending all over the body. Genus Beroe, Brown. 



LITERATURE OF THE CTENOPHORA. 



1. Agassiz, A. Mem. Amer. Acad. Arts and Sciences, x. 1874, p. 357. 



(Embryology. ) 



2. Ibid. Illust. Catal. Mus. Comp. Anat. Harvard, ii., North American 



Acalephae, 1865. 



3. Agassiz, L. Mem. Amer. Acad. Arts and Sciences, iv. 1850, p. 313. 



(Beroid Medusae of Massachusetts. ) 



4. Allman, J. Edinburgh New Philosophical Journal, N.S. xv. 1862, p. 285. 



5. Bethe, A. Biologisch.es Centralblatt, xv. 1895, p. 140. (Sub-epithelial 



Nerve Plexus.) 



6. Chun, C. Die Ctenophoren des Golfes von Neapel. Fauna und Flora des 



Golfes von Neapel, vol. i. 1880. 



7. Ibid. Bronn's Thier-reichs, Bd. ii. Abth. 2, Coelenterata, 1889-1892, 



p. 139. 



8. Ibid. Festschrift zum 7Q tm Geburtstage Rudolf Leuckarts, 1892, p. 77. 



(Dissogony.) 



9. Claus, C. Arbeit. Zool. Inst. Wien. vii. 1886, p. 23. (De'iopea, Symmetry 



of Ctenophora. ) 



10. Eschscholtz, Fr. System der Acalephen. Berlin, 1829. 



11. Gegenbatter, C. Arch. f. Naturgeschichte, Jahrg. 22, Bd. i. 1856, p. 162. 



12. Haeckel, E. Sitz. der Jenaischen Gesellsch. f. Med. u. Naturwiss. Jahrg. 



1879, p. 70. 



13. Hertwig, R. Jenaische Zeitschrift, xiv. 1880, p. 313. (Anatomy and 



Histology. ) 



14. Korotneff, A. Zeit. Wiss. Zool. xliii. 1886, p. 242. (Ctenoplana.) ' 



15. Kowalevsky, A. Mem. Acad. St. Pe'tersbourg, Se"r. 7, tome x. 1866. 



(Development.) 



16. Ibid. Zool. Anzeiger, 1880, p. 140. (Coeloplana.) 



17. Lang, A. Die Polycladen. Fauna u. Flora Neapel, xi. 1884. 



18. Metschnikof, E. Zeit. Wiss. Zool. xlii. 1885, p. 648. (Development.) 



19. Mertens, H. Mem. Acad. St. Petersbourg, Ser. 6, tome ii. 1833, p. 479. 



20. Rang. Mem. Soc. Nat. Hist. Paris, iv. 1828, p. 168. 



21. Samassa, P. Arch. Mikros. Anatomie, xl. 1892, p. 157. (Histology.) 



22. Willey, A. Quart. Jour. Micr. Sci. xxxix. 1896, p. 323. (Ctenoplana.) 



