300 FRESH-WATER BIOLOGY 



224 (221) Lorica with a stalk. Body may or may not fill the lorica. The 

 end of the lorica may be open or provided with slit-like 

 openings through which the tentacles extend. Tentacles 

 suctorial, knobbed, scattered, or in groups. 



Acineta Ehrenberg. 

 Representative species Acineta flumatilis Stokes 1885. 



Lorica subtriangular, compressed, very delicate, widest an- 

 teriorly, tapering to the attachment with the stalk. Stalk 

 shorter than the lorica. Two anterolateral openings for the 

 tentacles. Zooid usually filling the lorica. Length of lorica 

 40 to 80 M- Attached to aquatic plants. 



FIG. 559. Acineta fluviatilis. X 315. (After Stokes.) 



IMPORTANT REFERENCES ON MASTIGOPHORA AND INFUSORIA 



See list of general works under Sarcodina, p. 236; also the following: 

 DANGEARD, P. A. 1902. Recherches sur les Eugleniens. Le Botaniste, 



8:97-357; 4 Pi-, 53 figs. 



KENT, S. 1880-1882. A Manual of the Infusoria. 3 vols. London. 

 KOFOID, C. A. 1898. Plankton Studies, II. Bull. 111. State Lab. Nat. 



Hist., 5: 273-300; 12 pi. 

 1899. Plankton Studies, III. Bull. 111. State Lab. Nat. Hist., 5:419- 



440; i pi. 

 PALMER, T. G. 1905. Delaware Valley Forms of Trachelomonas. Proc. 



Acad. Nat. Sci., Phila., 57: 665-675; i pi. 

 POWERS, J. H. 1907. New Forms of Volvox. Trans. Amer. Micr. Soc. 



27:123-149; 4 pi. 

 1908. Further Studies on Volvox, with Descriptions of Three New Species. 



Trans. Amer. Micr. Soc., 28: 141-176; 4 pi. 

 Roux, J. 1901. Faune Infusorienne des eaux stagnantes des environs de 



Geneve, 149 pp., 8 pi., 4to., Geneve. 

 STOKES, A. C. 1888. A Preliminary Contribution Toward a History of the 



Fresh Water Infusoria of the United States. Jour. Trenton Nat. Hist. 



Soc., 1:71-344; 13 pi. 



