108 



directly into zoosporangia with an exit tube in the manner described 

 by the author' for N. profusum. 



In addition to the four species noted above, the following 

 chytrids have been found in the Texas material : 



Olpidium endogenmn in pollen of Pinus sylvesiris. State Park 

 Lake, Bastrop, Texas. 



Olpidium gregarum ( ?) in the bodies of rotifers. State Park 

 Lake, Bastrop, Texas. 



Rhisophidium pollinis on P. sylvestris pollen. State Park Lake, 

 Bastrop, Texas. 



Rhisophidium sp., and R. chaetijerum, saprophytic on dead 

 internodes of Chara coronata, State Park Lake, Bastrop, Texas. 



Rhisophidium glohosiim, parasitic on oogonia and male plants 

 of Oedogonium sp., water trough on Karling estate, Austin, Texas. 



Diplophlyctis intestina, Entophlyctis heliomorpha, N ephrochy- 

 triiim appendiculatuni, and Endochytrium operculatwn in dead 

 internodes of C. coronata. State Park Lake, Bastrop, Texas. 



Rhisophlyctis petersenii, Catenochytridimn carolineanum, Cla- 

 dochytrium replicatum, C. crassum (Hillegas, in press), C. hyali- 

 num, N owakowskiella profusum, and A^. elegans in rotting oat 

 leaves in a water trough, Karling estate, Austin, Texas. In C. re- 

 plicatum only about 10 percent of the resting spores were smooth ; 

 the remainder were covered with comparatively long tenuous setae. 

 In germination the resting spores developed thin-walled evanescent 

 zoosporangia on their surface, and no cases of direct transformation 

 into zoosporangia with exit tubes were observed. The latter type 

 of germination previously reported by the author*' ^ appears to be 

 exceptional. 



It is also significant to note in this connection that Lagenidium 

 pygmeum was found in great abundance in Pinus sylvestris pollen 

 at Bastrop, Texas. This species has been reported but once pre- 

 viously in the New World.® 



Botany Department, 



Columbia University, 



New York, N. Y. 



3 1941. Bull. Torrey Club 68:386. 



* Amer. Jour. Bot. 22: 450. 1933. 



•"'Science, 79:390. 1934. 



«J. S. Karling, 1941. Mycologia 33 (In Press). 



