262 
Boodle and WorsdelL—Oh the 
EXPLANATION OF FIGURES IN FLATES 
XV AND XVI. 
Illustrating Messrs. Boodle and Worsdell’s paper on the Comparative 
Anatomy of Casuarina. 
Fig. I. Portion of a transverse section of a young stem of C.glauca , Sieb., showing 
the cortical bundles ( ctb ), the transfusion -tissue (tf), and the palisade-tissue of the 
ridge (ps), with the outer protective layer of sclerenchyma (sc). On the inside is 
the central cylinder, xylem (x) ; phloem (ph) ; pith (p ). x 145. 
Fig. 2. Portion of a transverse section of a young stem of C. glauca , Sieb., 
showing the external endodermis ( e 2 ) running beneath the palisade- tissue ( ps ) and 
on the outer limit of the cortical bundle (ctb). On the inside is a single bundle 
of the central cylinder (b) with the internal normal endodermis (e l ) extending round 
it. ct = cells of the cortex, x 500. 
Fig. 3. Transverse section through a cortical bundle of C. glauca , Sieb., showing 
the relative amount of its xylem (x) and phloem (ph) and the groups of transfusion- 
elements (tf) running out from the side. x 500. 
Fig. 4. Transverse section through a cortical bundle of C. stricta, Ait., showing 
the group of sclerenchyma-fibres (.sr) on the outer limit of the phloem, a large 
transfusion-tracheide (tf) with a portion of the endodermis (e 1 ) running round 
it. x 335. 
Fig. 5. Transverse section through a cortical bundle of C.glauca , Sieb., showing 
transfusion-elements, x 500. 
Fig. 6 a. Transverse section of a transfusion-tracheide of C. stricta , Ait. 
sc, sclerenchyma. X500. 
Fig. 6 b. Transverse section of a transfusion-tracheide of C. glauca , Sieb. 
Fig. 7. Portion of a transverse section through the leaf- sheath of C glauca, Sieb. 
x 145- 
Fig. 8. Longitudinal section through part of the xylem (x) of the cortical bundle 
of C. glauca, Sieb., showing two long narrow tracheides running out to the 
transfusion-tissue ( If ). x 335. 
Fig. 9. Longitudinal section through part of the phloem (ph) of the cortical 
bundle of C. glauca, Sieb. A small bit of one of the tracheides of the bundle is 
shown (x). e 2 , the probable endodermal layer ; tf, the transfusion-tissue ; ps, the 
innermost cells of the assimilating tissue lining the furrow, x 500. 
Fig. 10. Longitudinal section which has passed to one side of the cortical 
bundle, and shown a row of transfusion-elements abutting on the face of the 
palisade-tissue ( C. glauca) . x 500. 
Fig. 11. Transverse section of sieve-tubes and their companion-cells from the 
phloem of C. sp. x 500. 
