490 



G. N. CALKINS AND L. H. GREGORY 



test 12 pathological divisions were counted in one dish, and so 

 forth. It is interesting and possibly significant that these ab- 

 normal divisions should appear now, whereas there has been no 

 evidence of them heretofore. 



Diagram 4 



-B. Conjugations in the B series 



The history of the B series is given on page 475, and condensed 

 in diagram 4. The first rich cultures were made January 25, six 

 weeks after isolation of the ex-conjugant. Tests were made on 

 the 28th of January, 2d and 6th of February. One pair of con- 

 jugants appeared in B2 and one pair in B28, both lines in quad- 

 rant C. 



