136 THE LOWER FUNGI— PHYCOMYCETES 



of exit papillae. The members of the genus seem to prefer 

 animal substrata, being found on dead flies, bones, etc., in 

 the water. 



Four species have been described which belong beyond question 

 in this genus. They are Allomyces arhuscula Butler (1911 : 1023), 

 Blastocladia strangulata Barrett (1912: 353), Septocladia dichotoma 

 Coker & Grant (1922: 180), and Allomyces javanicus Kniep 

 (1929). The first three are perhaps identical, but the various 

 workers who have published on the group do not agree in their 

 treatments. The student should consult von Minden (1916: 214), 

 Fitzpatrick (1923: 166), and Kanouse (1927: 303), as well as 

 the original papers. 



3. Blastocladia Reinsch (1878: 298). 



The thallus resembles that of Allomyces, but lacks pseudosepta 

 and is not definitely constricted (Fig. 51). The sporangium 

 is provided with only a single exit papilla. The genus includes 

 at present seven species. All were found growing saprophyti- 

 cally on submerged plant substrata. The most complete treat- 

 ment of the genus is that of Kanouse (1927: 297) but the papers 

 of Thaxter (1896: 45) and von Minden (1916: 189) also should be 

 consulted. 



BIBLIOGRAPHY: BLASTOCLADIALES 



Barrett, J. T., The development of Blastocladia strangulata n. wp. Botan. 



Gaz., 54: 353-371, pi. 18-20, 1912. 

 Butler, E. J., On Allomyces, a new aquatic fungus. Ann. Botany, 26: 



1023-1034, fig. 1-18, 1911. 

 Coker, W. C. and H. H. Braxton, New water molds from the soil. Jour. 



Elisha Mitchell Sci. Soc, 42: 139-147, pi. 10-15, 1926. 

 Coker, W. C. and F. A. Grant, A new genus of water mold related to 



Blastocladia. Jour. Elisha Mitchell Sci. Soc, 37 : 180-182, pi. 32, 1922. 

 Fischer, Ai.f., Saprolegnieae, Die Pilze Deutschlands, Oesterreich, und der 



Schweiz. {RahenhorsVs Kryptogamen-Flora), V:S10-378, fig. 50-61, 1892. 

 Fitzpatrick, H. M., Generic concepts in the Pythiaceae and Blasto- 



cladiaceae. Mycologia, 15: 166-173, 1923. 

 Harvey, J. V., A study of the water molds and Pythiums occurring in the 



soils of Chapel Hill. Jour. Elisha Mitchell Sci. Soc, 41: 151-164, pi. 



12-19, 1925. 

 , A survey of water molds occurring in the soils of Wisconsin as studied 



during the summer of 1926. Trans. Wise Acad. Sci., 23: 551-565, 



pi. 4-7, 1928. 

 Kanouse, Bessie B., On the distribution of the water molds, with notes on 



the occurrence in Michigan of members of the Leptomitaceae and 



Blastocladiaceae. Papers Michigan Acad. Sci., 5: 105-114, 1925. 



