The apparent paucity of saltation in the strains other than H. No. 1 
may be due in large part to the fact that these strains have been cultured 
to much less extent, though there is also evidence that H. No. 1 really is 
more actively saltating than are the other strains; indeed several strains, 
as H. No 2 and H. No. 29, have given no evidence of saltation. Saltation 
seemed to be as frequent in cultures derived from single conidia as from 
other cultures. 
SALTATIONS OCCURRED ON VARIOUS MEDIA 
Saltation was not confined to corn-meal agar, but was seen to occur 
also on green-wheat agar and on washed agar. The discrepancy in conidial 
measurements on two shoots (one in plate e and one in e’, cited on p. 121) 
may have been due to saltation on the washed agar. H. No. 34 as well 
as H. No. 1 showed saltation under standard conditions, that is, on washed 
agar on which wheat shoots were laid. Several of the shoots bore only 
sterile, white aerial mycelium, while the others were black owing to the 
usual number of conidia. Repeated transfers demonstrated the perma- 
nence of these characters. 
SALTATIONS AND MOopIFICATIONS OCCURRING IN 
TEST-TUBE CULTURES 
Certain cultures received from correspondents under the label Hel- 
minthosporium remained largely or quite devoid of conidia. The fol- 
lowing are brief descriptions of such Helminthosporiums. 
H. No. 11, of which graph of conidial length is given in Fig. S (cf. 
with Graph 42, Fig. K) and conidial-breadth in Graph 101, Fig. V, dif- 
fered in general colony-characters from H. Nos. 1, 3, etc., but most mark- 
edly in that it remained for the most part without conidia. Conidial 
septation is given in Fig. T, Graph 87. : 
H. No. 12, which was received under the label “‘H. gramineum (?)” 
evidently had sometime borne conidia, but transfers to many media under 
many conditions gave me none in any case. 
H. No. 17, also labeled H. gramineum, under standard conditions 
on wheat and corn usually produced mycelium with no conidia, though 
in one case one wheat shoot gave conidia, while five others in the same 
dish gave none. From this one shoot the conidial-length Graph 97 (Fig. 
U) was made. 
It seems to me that the three cases just mentioned should be regarded 
as those of saltants which have outstripped their originals in the test- 
tube conditions, while the rare cases in which they do bear conidia, par- 
