BUTLER AND KULKARNI. 247 



Fig. 9). They vary from but little more than the breadth of the 

 hypha, to over 3<V in diameter. They are developed both in the 

 basal part of the superficial mycelium and also embedded in the 

 depth of the medium. They are quite distinctive bodies, not re- 

 sembling in any way either the sporangia or the sexual spores of 

 the fungus. The only other species of Phytophthora in which bodies 

 which can be accurately identified as chlamydospores have been 

 found appear to be Phytophthora Faberi Maub., in which Rorer 1 

 has briefly described their characters and Petch 2 also appears to 

 have seen them, and Phytophthora parasitica Dastur 3 , in which 

 they closely resemble those of the present species. It is not im- 

 possible that the bodies described as parthenogenetic oospores in 

 several species are really chlamydospores. Thus several of the 

 figures of the ' ' oospores ' ' of Phytophthora Faberi given by Cole- 

 man 4 , especially PL XVIII, Fig. 8, probably represent chlamy- 

 dospores. So also it is possible that some of the ' ' parthenogenetic 

 oospores ' of Phytophthora injestans, described by American 

 authors, belong to the same category. In Pythium palmivorum 

 the ' ' resting spores ' ' were at first taken for oospores and only 

 later was their true character made out'. This species occupies 

 almost an intermediate position between the genera Pythium and 

 Phytophthora and its resting spores are evidently homologous with 

 the chlamydospores of the latter. 



The shape, the thickness and colour of the wall and its reaction 

 with Schulze's solution, the absence of a papilla and the position 

 on the bearing hypha, serve to distinguish these bodies from sporan- 

 gia. From sexual spores they are equally distinguishable by the 

 insertion on the hypha, more often intercalar than terminal and 



1 Rorer, J. B. Pod Rot, Canker and Chupon-Wilt of Cacao. Bull. Trinidad Dept, of 

 Agric., IX, No. 65, 1910, pp. 13 and 15. 



2 Petch, T. Cacao and Hevea Canker. Circ. & Agiic. Journ. of Roy. Bot. Card Ceylon 

 V, No. 13, 1910, p. 153, 



:{ Dastur, J. F. On Phytophthora parasitica now spec, a new disease of the Castor oil 

 plant, Mem. Dept. of Agric. in India, Bot. Ser. V., No. 4, 1913. 



4 Coleman, L. C. Diseases of the Areca Palm, I, Koleroga. Bull. Dept, of A<ric Mv«ore 

 State, Mycol. Ser., No. 2, 1910. 



■' Butler, E. J. An account of the genus Pythium. .Mem. Dept. of Agric. in India, Bot, 

 Ser. I, No. 5, 1907, p. 82 and Bud-rot of Palms in India ib., Ill, No. 5, 1910, p. 255, 



