146 Mr Seward, Notes on the Binney Collection 



and the corona are in a meristematic condition, as indicated by the 

 presence of short and regularly placed radial rows of small cells, 

 separated by delicate and recently formed cell-walls (as shown also 

 in Section 2, and represented in Text-fig. 2 m). These dividing 

 cells of the meristematic zone agree exactly with the characteristic 

 secondary tissue which is developed immediately external to the 

 corona in Lepidophloios fuliginosus. 



Slide 2. Text-figures 2 and 3 ; PL in. fig. 5 ; PL iv. figs. 6 

 and 9. 



Figure 2. Tbansveese Section through part of the Secretory and Meristematic 

 Zones, showing the Xylem of a Leaf-Trace. 



x, x, primary wood (corona) ; px, protoxylem of leaf-trace ; m, dividing cells in 

 the outer part of the meristematic zone; s, secretory tissue; e, ? endodermis. 

 (Slide 2, x 90.) 



On this slide there are two sections; one is a segment of a 

 transverse section with a radius of 2*8 cm., and the other a 

 longitudinal section; Binney 1 figures the latter in his PL xiii. 

 fig. 2 and a small portion of the former in his PL xiii. fig. 6. The 

 portion of the primary xylem ring seen in the transverse section 

 agrees with the corona of Section 1 except in its somewhat greater 



1 Binney (72). 



