LITERATURE OF THE CTENOPHORA 23 



branched papillae. Tentacles and tentacle sheaths absent. The meridional 

 canals unite with the stomodaeal 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. Ecthe, A. Biologisches 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 70*" Geburtstage Rudolf Leuckarts, 1892, p. 77. 



(Dissogony. ) 



9. Claus, C. Arbeit. Zool. Inst. Wien. vii. 1886, p. 23. (Delopea, Symmetry 



of Ctenophora.) 



10. JEschscholtz, Fr. System dcr Acalephen. Berlin, 1829. 



11. Gegenbaucr, C. Arch. f. Naturgcschichte, Jahrg. 22, Bd. i. 1856, p. 162. 



12. Haeckd, E. Sitz. der Jenaisehen Gesellsch. f. Med. u. Naturwiss. Jahrg. 



1879, p. 70. 



13. Hertwig, J2. Jenaische Zeitschrift, xiv. 1880, p. 313. (Anatomy and 



Histology. ) 



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



15. Kowalevsky, A. Mem. Acad. St. P6tersbourg, Se>. 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. Metschniko/, E. Zeit. Wiss. Zool. xlii. 1885, p. 648. (Development.) 



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



20. Hang. 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.) 



