Teleutospores. 45 
be typical of the species in question. There are instances, 
however, in which, instead of being truly typical, these 
uredospores depart in some degree from those subsequently 
found in the life-history of the Uredine. For example, in 
Triphragmium ulmarie the primary uredospores do not 
differ in their individual form and size from the secondary, 
but the former occur in large dusty sori principally on the 
petioles and midribs of the host-plant, while the latter are 
much smaller and scattered over the under-surface of the 
leaves. A more common deviation, however, consists in 
the association of the primary uredospores with spermo- 
gonia (Brachypuccinia). 
4. In other instances the mycelium produces spermo- 
gonia and ecidiospores, The zcidiospores may be upon 
the same species of host-plant upon which the teleuto- 
spores occur (Auteupuccinia), or upon some plant of a 
totally diverse nature (Heteropuccinia) 
The teleutospores of Endophyllum, although they are 
produced in the same way and closely resemble zxcidio- 
spores, yet in germination they behave like the teleutospores 
of Puccinia (Plate IV. Fig. 7). In Coleosporium (Plate IV. 
Fig. 9) each cell produces a single promycelial spore, 
while in Melampsora (Plate IV. Fig. 8) and Chrysomyxa 
(Plate IV. Fig..10) three or four are developed from each 
promycelium, as is also the case with Cronartium. 
