BY D. McALPINE. 303 



sometimes just at tip, sometimes almost at base. In some of the 

 forks the apex was pointed instead of being coiled. 



This is the first time the genus has been recorded for Australia, 

 hence the specific name. Fungi are only recoi'ded on L. indico, 

 L., but no Erysiphea;. 



I am indebted for the drawing of the perithecium (fig. 6) to 

 Mr. C. C. Brittlebank. 



EXPLANATION OF PLATES. 



Pucrinia calthiff, Link. 



Fig. 1. — Dwarf plant shewing Aecidia on upper surface of leaf ( x 2). 

 Fig. 2. — Aecidiospores ( x 1000). 



Fig. 3. — Aecidiospore from Pjritish specimen of CcdfJia palustris ( x 1000). 

 Fig. 4. — Pseudoperidial cells shewing marginal streaks ( x 540). 



Uncinula nustraliana, n.sp. — Australian Uncinula. 



Fig. .5. — Conidia in chains ( x 540) and solitai-y { x 1000). 

 Fig. 6. — Perithecium with contents protruding ( x270). 

 Fig. 7. — Forked appendages. 



Fig. S. — Ordinary appendage ( x 540) and coiled tip ( x 1000). 

 Fig. 9. — Immature ascus with sporidium ( x 1000). 



