280 THE POTOMAC OR YOUXGEK MESOZOIC FLOEA. 



nerves, and these in turn sending off subordinate ones which are very 

 slender, and anastomose at ver}' long intervals to form very long and large 

 meshes ; ultimate nervation not seen. 



Localities: Fishing hut above Dutch Gap Canal; red clay ball in the 

 banks of Dutch Cap Canal; very rare. 



This leaf differs from the other species of the genus in its large size, 

 in the great proportional size of the midrib, and in the very slender lateral 

 nerves which are sent off from the basal portion of the leaf, and for some 

 distance diverge very slightly from the midrib. The lateral primary 

 nerves hardly surpass in stoutness the secondary ones. 



AcacijEPIiyllum spatulatum, sp. nov. 



Plate CXXXVIII, Figs. 4, 6-!>. 



Leaves elliptical or spatulate in shape, mostly of the latter form, 

 inserted spirally and very obliquely on stout stems by means of long 

 petioles, into which the leaves gradually narrow, forming wedge-shaped 

 bases; petiole at the base of the leaf lamina splits up into three nerves ol 

 nearly equal importance, but with the middle slightly predominating ; each 

 of these sends off very oblique branches, wliich are quite slender and 

 anastomose at long intervals, forming very long and large irregularly 

 shaped meshes ; ultimate nervation not seen. 



Locahties: Fishing hut above Dutch Gap Canal; the red clay ball in 

 the banks of Dutch Gap Canal ; rare. 



The plant is most common at the first-named locality, but is not 

 abundant anywhere. The leaves of this plant may be compared with 

 those of Leucospermum conocmyum R. Brown. 



ACACI.<EPHYLLUM MICROPIIYLLUM, sp. nOV. 

 Plate CXXXVIII, Fig. 5. 



Main stem proportionally very stout; leaves spirally placed and very 

 obliquely on the stems, small, elliptical in shape, narrowed gradually with 

 a wedge-shaped base into a petiole of varying length, subacute, nerves as 

 in the preceding species. 



Locality : Fishing hut above Dutch Gap Canal. 



