48 THE TRANSVERSE SECTIONS OF PETIOLES OF EUCALYPTS 



The result of this test was that four were named correctly and two wrongly, as 

 shown in the following, sent by Mr. Guilfoyle : — 



YOURS. MINE. 



No. 1 .... E. cornuta .... E. cornuta 



,, 2 .... ,, corynocalyx .... ,, corynocalyx 



,, 3 .... ,, gomphocephala .... ,, gomphocephala 



,, 4 .... ,, megacarpa .... ,, megacarpa 



,, 5 .... ,, viminalis .... ,, occidentalis 



,, 6 .... ,, melliodora .... ,, punctata 



It will not be necessary to say much about the first four, which were correctly 

 named, but the two latter incorrectly named deserve further notice. The following 

 remarks are meant to show the principal points which guided us in coming to a 

 decision. 



No. 1. E. cornuta showed the characteristic features in the size and shape of the 

 section ; the large and numerous cortical cavities quite close together ; crystals 

 moderately numerous ; the wood-pattern continuous or often discontinuous at the 

 horns, which are sharply incurved (as in Fig. 12), and the vessels distributed towards 

 the middle and upper portion of wood. 



No. 2. £. corjHocrt/ja' showed numerous but comparatively small cortical cavities ; 

 crystals rather few ; relatively few hard bast cells ; symmetrical and generally entire 

 wood-pattern, with slender, short, and gently incurved horns. (Fig. 27.) 



No. 3. E. gomphocephala showed few and moderately large cortical cavities ; 

 wood-pattern, with very stout body and horns well curved in, and approaching each 

 other ; and the vessels large and numerous, and mostly in upper portion of wood. 

 The large proportion of wood is a feature of Gomphocephala. (Fig. 17.) 



No. 4. E. megacarpa showed flattened section, tending to angularity, and nearly 

 twice as broad as thick ; hard bast irregular, and cells arranged in patches ; wood- 

 pattern, with slender body, slightly thickened in middle, and short horns gently 

 incurved. (Fig. 18.) 



No. 5. E. occidentalis (determined as E. viminalis). Since E. occidentalis is 

 confined to Western Australia, and E. viminalis does not occur there, it is evident 

 that the locality of the specimen would have prevented that mistake. 



As this particular specimen was somewhat puzzling to determine, it received 

 special attention, and the following diagnosis of it was made by one of us : — 



Outline of Section. — Oval ; flattened on upper surface. 

 Outer wall of Epidermis. — i^iu., relatively thin. 



