COELENTERATA : LITERATURE. l8/ 



31. " Der Generation - Wechsel und die Fortpflanzung der Medusen." 



Gegenbaur. 1854. 



32. " Versuch eines Systems der Medusen." ' Siebold and Kolliker's 



Zeitschrift, ' 1857. Gegenbaur. 



33. "Contributions to the Natural History of the United States." 



(Acalephae, vols. ii. and iii.) Louis Agassiz. 1860-62. 



34. "North American Acalephce." '111. Cat. Mus. Comp. Zool.,' ii. A 



Agassiz. 1865. . 



35. "Monograph of the Gymnoblastic or Tubularian Hydroids." 'Ray 



Society.' Allman. 1871. 



36. " Ueber eine neue Form des Generation- wechsel's, bei den Medusen," 



&c. ' Monatsbericht der Kon. Akad. der Wiss. Berlin,' 1865. 

 (Trans. Annals of Nat. Hist., 1865.) Haeckel. 



37. " Beitrage zur Naturgeschichte der Hydromedusen. " Haeckel. 1865. 



38. " Studien liber die Entwickelung der Medusen." 'Siebold and 



Kolliker's Zeitschrift,' 1874. Metschnikoff. 



39. "Life- Histories of Animals." Packard. 1875. 



V. GRAPTOLITID^. 



40. " Graptolites de Boheme." Barrande. 1850. 



41. " Ueber Graptolithen." Scharenberg. 1851. 



42. "Die Graptolithen." ' Versteinerungen der Grauwacken-formation.' 



Geinitz. 1852. 



43. " Graptolites of the Quebec Series. " ' Descript. of Canadian Organic 



Remains.' Decade ii. Hall. 1865. 



44. " British Graptolites. " ' Siluria,' 4th Edition, Appendix. Carruthers. 



1867. 



45. "Monograph of the British Graptolitidoe." Part i., General Intro- 



duction. Nicholson. 1872. 



46. "Morphology and Affinities of Graptolites." 'Annals Nat. Hist.,' 



1872. Allman. 



VI. HYDROCORALLIN^. 



47. " Contributions to the Natural History of the United States. " Louis 



Agassiz. (The animal of Millepora is figured, vol. ii., pi. xv., and 

 the genus is referred to the Hydrozoa. ) 



48. " Grundziige der Zoologie." Clans. 1874. 



49. "Observations critiques sur la classification des Polypiers paleo- 



zoiques." Compt. Rend. t. Ixxx., 1875. Dollfus. 



50. "Notes on Two Species of Millepora," &c. 'Phil. Trans.,' 1876. 



Moseley. (This memoir also contains a note on the structure of a 

 Stylaster.) 



51. " Structure of a Species of Millepora occurring at Tahiti." ' Annals 



Nat. Hist.,' 1876. Moseley. 



52. " Preliminary Note on the Structure of the Stylasteridae." ' Annals 



Nat. Hist.,' 1877. Moseley. 



53. " On the Actinozoan Nature of Millepora alcicornis." ' Annals Nat. 



Hist.,' 1876. Nelson and Martin Duncan. 



54. "On the Structure of the Stylasteridas." ''Phil. Trans.,' 1878. 



Moseley. 



