564 FETCH : 



days in comparison with normal Thielaviopsis spores. Tills 

 point Is particularly well illustrated by an examination of the 

 detailed results of (6) and (c). These are given below, the 

 days being the number of days since the transfer of the spores. 

 (&)- 



2 days. No. 1, fair growth, but white ; No. 2, growing. 



3 days. No. 1, good ; No. 2, fair ; Nos. 3 and 4, growing. 



4 days. Nos. 1 and 2, good ; Nos. 3 and 4, fairly good. 



5 days. Nos. 1-4, good ; Nos. 5 and 6, growing. 



6 days. Nos. 1-6, good; No. 7, growing ; No. 11, growing. 



7 days. No. 7, fair ; Nos. 8 and 9, growing ; No. 11, fair. 



8 days. No. 7, good; No. 8, fair; No. 9, mycelium only; 

 No. 10, growing ; No. 11, good. 



9 days. No. 9, good ; No. 10, fair but white ; No. 11, good. 

 This was not examined again until forty days from the time 



of transfer ; Nos. 12 and 13 had then developed a good growth, 

 (c)- 



2 days. No. 1, fair. 



3 days. No. 1, good ; No. 2, growing. 



4 days. Nos. 1 and 2, good ; No. 3, growing. 



5 days. Nos. 1 and 2, good ; No. 3, fair ; No. 4, growing. 



6 days. Nos. 1-4, good. 



7 days. No. 5, growing. 



8 day^. No. 5, fair ; No. 6, growing. 



9 days. No. 5, fairly good ; No. 6, fair but white ; No. 7, 

 growing, but not above surface of liquid. 



As with (6), this was not examined further until forty days 

 had elapsed from the time of transfer. Every transfer had then 

 developed up to and including No. 17, except Nos. 13 and 16. 



It is clear from these records that this retardation is not due 

 to a diminished rate of growth after the germination of the 

 spores. In each case the culture has produced a good growth 

 of mycehum, covering the whole surface, and has arrived at 

 the macroconidial stage, within two days of germination, as 

 is usual with untreated spores. The retardation is therefore 

 due to a delayed germination ; this conclusion is confirmed by 

 the results of 2 (a). 



This result is extremely important, in that it indicates the 

 necessity of a more prolonged examination than is usually 



