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conidial production and vice versa. Correlations observed are indicated 
as follows: 
Slow linear growth+——high conidia-production 
Much aerial mycelium—-— low conidia-production 
Pale colony——rapid growth 
Thickening of conidia—— shortening of conidia 
Pale colony——low conidia-production 
Clumping of mycelium—-— low conidia-production 
The differences in colony-color and growth-rapidity here noted, are 
much like those described by Edgerton (51) in Glomerella plus and minus 
strains. Crabill (36) notes also a correlation in that his minus strains were 
always of more rapid growth than the plus strains. 
TENDENCIES IN SALTATION 
Saltants showing very low conidia-production, verging on sterility, 
coupled with paleness of colony, occurred with the greatest frequency. A 
type with increased conidia-production and of slow growth was next in 
frequency. The latter of these types was the most frequently thrown dur- 
ing the early period of my work though it has been rare recently. On the 
other hand, the former type, which rarely appeared at first, is now the most 
common. A type characterized by thickness of conidium, as M6, M8, etc., 
has been frequent all the time. These three types were by far the most 
common, and may be said to show the three tendencies. Markedly short- 
conidia saltants were few, as were also clump-bearing types that possessed 
permanence. Strains that threw either of the two types first mentioned 
above were very likely to continue to throw similar types. The same may 
be said of clump-bearing types. 
STABILITY OF THE SALTANTS 
Many saltants have been tested in various ways to determine, to some 
degree, their constancy. Through numerous transfers on corn-meal agar 
the O colony and the M colony of many saltants have been carried side by 
side. Under such conditions, though the original may give rise to new 
saltations or the saltant may saltate further, the main portion of both the 
O and M colony, as a rule, maintains its characters. 
It is manifestly impossible to test all the saltants to ascertain what 
their future behavior will be. All that can be done at present is to record 
certain observations concerning them. Several saltants possessing strongly 
distinctive characters have been repeatedly transferred and have maintained 
their characters through all of these transfers; and as far as can be foreseen 
