<^ 5. INFUSORIA AND U1^Z01'0^A. 23 



Class Rhizopoda. 



Organs of locomotion consistiitg of completely retractile, ramifying 

 prolongations of the body. 



ORDER I. MONOSOMATIA. 



Family : Amoebaea. 

 Genus : Amoeba. 



Family : Arcellina. 

 Genera : Arcella, Diffiugia, Gromia, Miliola, Euglypha, Trinema. 



ORDER II. POLYSOMATIA. 



Genera : Vorticialis, Geoponus, Nonionina.^^ 



BIBLIOGRAPHY. 



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



Ehrenberg. Die Iiifusionsthierchen als voUkommene 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, vorziiglich nach Eh- 

 renberg's Beobachtungen bearbeitet. Calsruhe, 1841. 



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

 This work treats also of the E-hizopoda. 



ADDITIONAL BIBLIOGRAPUY. 



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. Beitrage zur Entwickelungsgeschichte der Infusorien, in Siebold 

 & Kdlliker'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 & Klilliker'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 been the objecbi 

 of anatomical study. 



