MR. W. C. WORSDELL ON "TRANSFUSION-TISSUE." ^SIO 



EXPLANATION OF THE PLATES. 



Plate XXIII. 



Fig. 1. Two tracheides of typical Gymnospermous transfusioD-tissue. X 390. 



Fig. 2. Transverse section of a bundle from the pinna of Cycas circinaUs, Linn., showing centripetal 



xylem and transfusion-tissue, x 130. 

 Fig. 3. Transverse section of a bundle from the cotyledon of Ginkgo biloba, Litm. x 300, 

 Fig. 4. Radial section of ditto, x 390. 

 Fig. 5. Transverse section of bundle from lamina of foliage-leaf of Ginkgo biloba^ Linn. x 390. 



Plate XXIV. 



Fig. 6. Transverse section of bundle from petiole of foliage-leaf of Qinkgo biloba, Linn. x 130. 

 Fig. 7. Radial section of bundle from petiole of foliage-loaf of Ginkgo bihhn, Linr). x 39f). 

 Fig. 8. Transverse section of bundle from lamina of cotyledon of Cycas revohita. Tluinb. x H5. 

 Fig. 9. Transverse section of bundle from stalk of cotyledon of Cycas revointa, Tluuil). x 390. 

 Fig. 10. Radial section of bundle from lamina of cotyledon of Cycas revoluta, Thunb. X 390, 

 Fig. 11. Tangential section of portion of pinna adjoining the bundle of Cycas circinalis, Linn., showing 

 the " accessory transfusion-tissue." x 130. 



Plate XXV. 



Fig. 12. Transverse section of bundle from pinna of Ceratozamia mexicana, Brongn. x 390. 

 Fig. 13. Transverse section of bundle from cotyledon of Cephalotaxus drupacen, Sieb. & Zucc. x 390. 

 Fig. 14. Radial section of bundle from cotyledon of Cephatolaxus Fortuni, Hook, x 390. 

 Fig. 15. Transverse section of bundle from leaf of 7'aa'M* baccata, Linn, x 390. 



Fig. 16. Transverse section of leaf of Podocarpus chilina, Rich., showing accessory stone-cell tissue. 

 X 85. 



Plate XXVI. 



Fig. 17. Radial section of bundle from cotyledon of Araucaria excelsa, R. Br. x 390. 



Fig. 18. Transverse section of bundle from leaf of Araucaria imbricata, Pav. x 390. 



Fig. 19. Transverse section of bundle from leaf of Dammara sp. X 390. 



Fig. 20. Radial section of ditto, and two tracheides of transfusion-tissue from the side of the bundle. 



X 390. 

 Fig. 21. Radial section of leaf of Pinus Pinaster, Soland. X 390. 



