^ 5. INFUSORIA AND RHIZOPODA. 23 



Class Rhizopoda. 



Organs of locomotion consisting of completely retractile, ramifying 

 prolongations of the body. 



ORDER I. MONOSOMATIÄ. 



Family : Amoebaea. 



Genus : Amoeba. 



Family : Arcellina. 

 Gonera : Arcella, Difflugia, Gromia, Miliola, Euglypha, Trinema. 



ORDER IL POLYSOMATIA. 



Genera : Vorticialis, Geoponus, Nonionina.^^ 



BIBLIOGRAPHY 



O. F. Midler. Animalcula Infusoria. Hafniae, 1786. 



Ehrenberg. Die Infusionsthierchen als vollkommene Organismen. 

 Leipzig, 1838. Also his numerous and important memoirs upon the 

 Infusoria and Rhizopoda in the- Memoirs of the Berlin Academy, and its 

 Monthly Bulletin. 



Andrew Pritchard. A History of Infusoria, living and fossil, arranged 

 according to the " Infusionsthierchen," of Ehrenberg. Illustrated by 

 nearly 800 colored engravings of these curious creatures, highly magnified. 

 London, 1841. 



Kutorga. Naturgeschichte der Infusionsthierchen, vorzüglich nach Eh- 

 renberg's Beobachtungen bearbeitet. Calsruhe, 1841. 



Dujardin. Histoire Naturelle des Zoophytes. Infusoires, Paris, 1841. 

 This work treats also of the Rhizopoda. 



ADDITIONAL BIBLIOGRAPHY. 



Besides the various articles quoted in the additional notes I have made 

 the following are among the more important recent writings on this subject : 



Cohn. Beiträge zur Entwickelungsgeschichte der Infusorien, in Siebold 

 & Kölliker's Zeitsch. III. Hft. 3, and IV. Hft. 3. 



Ecker. Zur Entwickelungsgeschichte der Infusorien, in Siebold & Kol' 

 liker's Zeitsch. III. Hft. 4. 



Stein. Neue Beitr. zur Kenntn. d. Entwickelungsg. u. d. feineren 

 Baues d. Infusionsthiere, in Siebold & iCöKiA-er's Zeitsch. III. p. 475, 



Pritchard. A History of Infusorial Animalcules, living and fossil, &c., 

 with illustrations, new edition. London, 1852. 



See also numerous notes in the Annales des Sciences Naturelles, since 

 1847. — Ed. 



1 In this table are mentioned the families and genera of those only which have Veen the objects 

 of anatomical study. 



