ON THE PROTEACEiE OF JUSSIEU. 11 



of Shark's Bay, by the botanists attached to the expedition 

 of Captain Baudin. 



From knowledge so acquired I am inclined to hazard the 

 following observations. 



The mass of the order, though extending through the 

 whole of the parallel already Mentioned, is by no means 

 equal in every part of it ; but on the south-west coast 

 forms a more decided feature in the vegetation of the [33 

 country, and contains a far greater number of species than 

 on the east : — and in that part of the south coast, which 

 was first examined by Captain Tlinders, it seems to be 

 more scanty than at either of the extremes. 



On the west coast also, the species upon the whole are 

 more similar to those of Africa than on the east, where 

 they bear a somewhat greater resemblance to the American 

 portion of the order. 



From the parallel of the mass, the order diminishes in 

 both directions ; but the diminution towards the north is 

 probably more rapid on the east than on the west coast. 



Within the tropic, on the east coast, no genera have 

 hitherto been observed, which are not also found beyond 

 it ; unless that section of Grevillea, which I have called 

 Cydopterce, be considered as a genus. Whereas at the 

 southern limit of the order several genera make their 

 appearance, which do not occur in its chief parallel. 



The most numerous genera are also the most widely 

 diffused. Thus Orevillea, Ilakea, Banksia, and Persoonia, 

 extensive in species in the order in which they are here 

 mentioned, are spread nearly in the same proportion ; and 

 they are likewise the only genera that have as yet been 

 observed within the tropic. 



Of such of the remaining genera, as consist of several 

 species, some, as Isopoc/on, PetropJiila, Conospermum, and 

 Lambertia, are found in every part of the principal parallel, 

 but hardly exist beyond it. Others, as Josephia} and Si/na- 

 phea, equally limited to this parallel, have been observed 

 only towards its western extremity ; while Emholhrium 



' Subsequently in this paper altered to Drym'ulra. Confer Prodr. Ft. Nov. 

 Boll. 1, p. 396.— Edit. 



