PLATE 11. 



Calamodendron commune. 



Fig. 1, Transverse section of Specimen No. 1. Natural size. 



Fig. 2. A portion of the transverse section of the same specimen, showing parts 

 of two wedge-shaped bundles of pseudo-vascular tissue, originating at two " orifices" on 

 the outside of the central axis, and parts of the three wedge-shaped masses of coarse 

 tissue, arranged in radiating series. Magnified 10 diameters. 



Fig. 3. A longitudinal section of the same specimen, showing the walls of the 

 tubes forming the pseudo-vascular cylinder perforated by elongate-oval openings; 

 taken near to the central axis. Magnified 70 diameters. 



Fig. 4. A tangential section similar to the last, taken nearer to the outside of 

 the specimen, showing the oval openings on the walls of the tubes. Magnified 

 70 diameters. 



Fig. 5. A tangential section of No. 1 Specimen, taken near the central axis, 

 showing the pseudo-vascular bundles and the lax tissue dividing them. Magnified 15 

 diameters. 



Fig. 6. A section similar to the last, taken near the middle of the specimen. 

 Magnified 40 diameters. 



