M0X0BI.!:!MI.\R1S 179 



the sperms. Anthcriclia formed near the oogonia, procliuin.u uniciliate 

 sperms which escape and fertilize the eggs. The fertilized egg matures 

 within the oogonium or passes out of it and matures attached to its tip. 



For nianv \ears this family contained only the remarkable genus 

 Monoblcpharis estal)lished by Cornu in 1871, (p. 59) and later described 

 more fully and figured ['72). Lagerheim in 1900 (pp. :i2 and 39) pro- 

 posed the genus Diblepharis to contain the two American species de- 

 scribed by Thaxter ('95). For other important literature see Fischer 

 ('92, p. 378); and Woronin ('04). Tiescnhausen ('12) finds M.poly- 

 niorplia and .1/. niacrandni and gi\es a figure of the former. The genus 

 Gottapodya of Fischer, placed by him in tlie Monoblepharidaceae, has 

 been shown by Thaxter ( '95a) to be better disposed of in the Leptomitaceae 

 (which see). We have not found any species of this family, but give 

 below an enumeration of the genera and species for the convenience of 

 students :t 



iMOXOBLEPHARIS Cornu. 1871, p. 59. 



Zoospores with one cilium; all the contents of the sporangia and 

 oogonia entering into their products. 



Sub-genus Eiimonoblepharis Lagerheim. Fertilized eggs maturing within 

 the oogonia. Includes only one species. 

 M. sphaerica Cornu. Europe. 

 Sub-genus Exoospora Lagerheim. Fertilized eggs moving out of the 

 oogonium and maturing outside. 



M. polymorpha Cornu. Europe and Xew England (Thaxter). 

 M. polymorpha var. macrandra Lagerheim (1. c, p. 35) [M. mucran- 



dra (Lagerh.) Woronin.] Europe. 

 M. brachyandra Lagerheim (I. c, p. 37). Europe. 

 In the two following imperfectly known species the sexual repro- 

 duction has not been seen and their relationships are therefore uncer- 

 tain: 



M. regignens Lagerheim (p. 39). 

 M. ovigera Lagerheim fp. 39). 

 Woronin ('04) figures an intermediate form that he thinks may be 

 a hybrid between M. p. var. macrandra and M. sphaerica. 



DIBLEPHARLS Lagerheim, 1900, p. 39. 



Zoospores with two cilia, on escaping lea\-ing a droj) of oil in the 

 sporangium. Oogonium on opening discharging a part of its proto- 



t The plant described by Hine as Monoblcpharis lateralis (.\in. Quart. Micr. Journ. 

 1: 141. 1879) is evidently not of this genus but probably a Saproleguia which was incor- 

 rectly observed and interpreted. 



