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39. "Anatomy and Physiology of the Spongiadse." 'Phil. Trans.,' 



1859. Bowerbank. 



40. "British Spongiadse" ('Ray Society'). Bowerbank. 



41. "History of British Sponges and Li thophytes." Johnston. 1842. 



42. "Die Spongien des Adriatischen Meeres," 1862-66. Oscar Schmidt. 



43. "Grundztige einer Spongien-Fauna des Atlantischen Gebietes," 1870. 



Oscar Schmidt. 



44. " Die Kalk-Schwamme." Hseckel. 1872. 



45. "Anatomy and Classification of Sponges." ' Annals of Nat. Hist.,' 



1875. Carter. 



46. " Vitreous Sponges," 'Annals Nat. Hist.,' 1868. Wyville Thomson. 



47. " Classification of Sponges." ' Proc. Zool. Soc.,' 1867.. Gray. 



48. "Development of the Marine Sponges." 'Annals Nat. Hist.,' 



1874. Carter. 



49. "Development of the Calcispongige. " 'Annals Nat. Hist.,' 1875. 



(Translation.) Metschnikoff. 



50. "The Spongiae ciliatae as Infusoria flagellata. " 'Annals Nat. Hist.,' 



1868. James-Clark. 



51. "The Depths of the Sea," 1873. Wyville Thomson. 



52. " On Holtenia." 'Phil. Trans.,' 1870. Wyville Thomson. 



53. "OnCliona." 'Annals. Nat. Hist.,' 1849. Albany Hancock. 



54. " Ventriculitidae of the Chalk." 'Annals Nat. Hist.,' 1847, 1848. 



Toulmin Smith. 



55. " Untersuchungen liber Hexactinelliden." ' Zeitschr. fur Wiss. Zool.,' 



vol. xxv., 1877. W. Marshall. 



56. "Handbuch der Palaeontologie, " vol. i., part 2, 1879. Zittel. 



57. "Beitrage zur Systematik fossiler Spongien." 'Neues Jahrb. filr 



Min. Geol. und Paleont.,' 1877, 1878. Zittel. 



58. " On Haeckel's Group of the ' Physemaria,' and on the Affinities of the 



Sponges." ' Ann. Nat. Hist.,' ser. 5, vol. i., 1878. Saville Kent. 



59. "On the genus Haliphysema." 'Ann. Nat. Hist.,' ser. 5, vol. i., 



1878. A. M. Norman. 



INFUSORIA. 



60. "Die Infusionsthierchen als volkommene Organismen," 1838. Ehren- 



berg. 



61. " Infusoires," 1841. Dujardin. 



62. " Der Organismus der Infusionsthiere," 1867. Stein. 



63. " Etudes sur les Infusoires et les Rhizopodes." 'Mem. de 1'Institut 



National Genevois,' 1858-61. Lachmann and Claparede. 



64. " Recherches sur les organes generateurs et la reproduction des In- 



fusoires." 'Comptes Rendus,' 1858. Balbiani. 



65. "Untersuchungen iiber den Ban und die Naturgeschichte der Vor- 



ticellen." ' Archiv fur Naturg.,' 1870. Greeff. 



66. " Zur Morphologic der Infusorien." ' Jenaische Zeitschrift,' vol. vii., 



1873. Hseckel. 



67. " Ueber einige neue pelagische Infusorien." 'Jenaische Zeitschrift,' 



vol. vii., 1873. Hseckel. 



68. " History of Infusoria." Pritchard. 



69. "Recent Progress in our Knowledge of the Ciliate Infusoria." 



'Proc. Linn. Soc.,' 1875. Allman. 



70. " Flagellate Infusoria. " ' Annals Nat. Hist.,' 1868. James-Clark. 



71. "Beitrage zur Kenntniss der Monaden." ' Archiv fur Mikr. Anat.,' 



1865. Cienkowski. 



72. " Researches on the Life-History of the Monads." ' Monthly Micr. 



Journ.,' vols. x.-xiii., 1873-75. Dallinger and Drysdale. 



