468 
PUCCINI A ON GEOUNDSEL, 
and constant observation of the exceptional forms of spores, just 
as the methodical investigation of exceptional forms of plants 
or animals may throw light upon the origin of certain phases of 
life and show that what is abnormal and exceptional at one stage 
and under certain surroundings, may become the normal under 
different conditions of existence. 
EXPLANATION OF PLATES. 
Puccinia on Groundsel. 
(All figures except figs. 7 and 10 magnified 600 diameters.) 
Plate xxxiv. 
Fig. 1. — Various shapes and siz c s of aecidiospore. 
Fig. 2. — Various forms of teleutospore. 
Fig. 3. — Group of teleutospores. 
Plate xxxv. 
Fig. 4. — Unicellular spores. 
Fig. 5. — Three-celled teleutospore. 
Fig. 6. — Aecidiospores. 
Fig. 7. — Teleutospores ( x 115). 
Plate xxxvi. 
Fig. 8. — Teleutospores. 
Fig. 9. — Group of teleutospores. 
Fig. 10. — Unicellular spore : the same ( x 115). 
Fig. 11. — Tricellular spores. 
CATALOGUE OF THE DESCRIBED COLEOPTERA OF 
AUSTRALIA. SUPPLEMENT, PART I. CICINDE- 
LID^E AND CARABID^E. 
By George Masters. 
Issued separately as a Supplement to the Part. 
