160 A CATALOG OF ILLINOIS ALGAE 



phyceae L In A. Pascher, Die Susswasserflora Deutschlands, Osterreich 



und der Schweiz. Heft 4: 1-506. figs. 1-451. 

 , and Lemmermann, E. 1913. Chrysomonadinae, Cryptomonad- 



inae, Eugleninae, Chloromonadinae. Ibid. Heft 2. Flagellatae 2. pp. 1- 



192. figs. 1-398. 

 , Schiller, J., and Migula, W. 1925. Heterokontae, Phaeophyta, 



Rhodophyta, Charophyta. Ibid. Heft 11: 1-250. figs. 1-208. 

 -, and Vischer, W. 1939. Heterokonten. In Rabenhorst's Krypto- 



gamen-Flora von Deutschland, Osterreich und der Schweiz. Band 11 : 1- 



1092. figs. 1-912. 

 Prescott, G. W. 1927. The motile algae of Iowa. Univ. of Iowa Stud. 12: 



1-40. pis. 1-10. 



. 1931. Iowa algae. Ibid. 13: 1-235. pis. 1-39. 



. 1935. Notes on the desmid flora of New England, II. RhodoraJZ; 



113-121. pis. 329-330. 



1936. Notes on alpine and subalpine desmids from western 



United States. Pap. Mich. Acad. Sci., Arts and Letters 21: 135-146. pis. 



15-17. 

 Printz, H. 1927. Chlorophyceae. In A. Engler and K. Prantl, Die Natur- 



lichen Pflanzenfamilien. Band 3: 1-463. figs. 1-366. Leipzig. 

 *Purdy, W. C. 1922. A study of the pollution and natural purification of 



the Ohio River. I: The plankton and related organisms. U. S. Pub. 



Health Serv. Bull. 131, pp. 1-77. (1923). 

 * . 1930. A study of the pollution and natural purification of the 



Illinois River. II: The plankton and related organisms. Ibid. 198, pp. 



1-212. 

 Rabenhorst, L. 1864-68. Flora Europaea Algarum. Lipsiae. 

 *Richardson, R. E. 1921. The small bottom and shore fauna of the middle 



and lower Illinois River and its connecting lakes, Chillicothe to Grafton: 



its valuation; its sources of food supply; and its relation to the fishery. 



Bull. 111. State Lab. Nat. Hist. 13: 363-522. 

 * . 1930. Notes on the simulation of natural aquatic conditions in 



fresh water by the use of small non-circulating balanced aquaria. Ecol- 

 ogy 11: 102-109. 

 Schiller, Jos. 1933. Dinoflagellatae (Peridineae). In Rabenhorst's Kryp- 



togamen-Flora von Deutschland, Osterreich und der Schweiz. Band 10, 



Abteil. 3, Teil 1. pp. 1-617. figs. 1-631. 

 . 1937. Dinoflagellatae (Peridineae). Ibid. Band 10, Abteil. 3, Teil. 



2. pp. 1-589. figs. 1-612. 

 Schilling, A. C. 1913. Dinoflagellatae (Peridineae). In A. Pascher, Die 



Susswasserflora Deutschlands, Osterreich und der Schweiz. Heft 3: 1-66. 



figs. 1-69. 

 Skuja, H. 1930. Suesswasseralgen von den westestnischen Inseln Saare- 



maa und Hiiumaa. Acta Horti Botanici, Univ. Latv. 4: 1-76. pis. 1-3. 

 *Skvortzow, B. V. 1937. Diatoms from Lake Michigan — I. Amer. Midi. 



Nat. 18: 652-658. pi. 1. figs. 1-32. 

 Smith, G. M. 1916. A monograph of the algal genus Scenedesmus based 



upon pure culture studies. Trans. Wis. Acad. Sci. 18: 422-530. pis. 25- 



33. 



