LXXXIV. E. aggregata Deane and Maiden. 



PAGE, 



Synonym . 427 



LXXIL E. Forrestiana Diels. 



Additions to description 429 



CCCLXXIX. E. Merrickae. Maiden and Blakely. 



Description 430 



Range 431 



Affinities ............ 431 



CLXXX1X. E. clavigera A. Cunn. var. Gilbertensis 

 Maiden and Blakely n. var. 



Description ........... 432 



Affinities ............ 432 



THE SPECIES QUESTION. 



1. What is a species ? 433 



2. Variety or species ? 433 



3. Inequality of species-values ..... 434 



4. No fixed line of demarcation between Species . 434. 



5- Jordan's species. 436 



6 A classical case of "splitting" 437 



7. Application of zoological tests to botanical 



species .......... 437 



8. Variation in the genus . . . . . . . 438 



THE STRUGGLE FOR TAXONOMIC DEFINITENESS. 



1. The ideal of the type 



2. How to designate the type 



3. Model descriptions. . 



4. Labels and schedules 



Some aphorisms .... 

 Explanation of plates (280-288) 



439 

 440 

 442 

 443 



445 

 448 



