94 



In the following the wing is dorsal to somewhat circumferential :— 



E. buprestium. E. pachyloma. 



E. Todtiana. 



Wing or membrane circumferential : — 



E. angulosa. E. macrocarpa 



E. Isingiana. E. pyriformis. 



Wing rudimentary, circumferential : — 



E. cornuta. E. Lehmanni. 



E. gomphocephaia. E. occidentalis. 



E. gamopJiylla (" Eucalyptographia ") 



E. pachyphylla do. 



Wing rudimentary. 



(a) The following species have a very small, imperfectly developed, dorsal wing : — 



E. corymbosa. E. calophylla. 



E. Nouraensis. E. calophylla var. rosea. 



(b) The following have a very small marginal membrane or rudimentary wing, 



which is present on some of the seeds only : — 



E. Bloxsomei. E. maculata. 



E. citriodora. E. peltata. 



E. eximia. E. trachyphloia. 



E. Watsoniana. 



8. -HILUM. 



The hilum is the scar left on a seed to which the placenta was formerly 

 attached. 



In a number of cases it is readily "distinguished by its size, and also in being 

 slightly or markedly different in colour to that of the testa. It is usually ovate to 

 orbicular ; sometimes it is surrounded by a deep or shallow depression. There are, 

 however, exceptions, when it is obscure or microscopic and only discernible under a 

 powerful lens. 



Bentham used the terms " ventral or lateral " to designate its position on the 

 seed; while Mueller made use of the terms "ventral or basal." The former term is 

 very largely used in the descriptions which follow, as the seeds of a large number of 

 species are found to possess a more or less ventral hilum. In some cases it is sometimes 

 very difficult to say what the position of the hilum really is, owing to the shape of 

 the seed, and also without an examination of the seed while attached to the placenta. 



