X y6 BOTANICAL GAZETTE [September 



LITERATURE CITED 



i. Caldwell, Otis W., Microcycas calocoma. Bot. Gazette 44:118-141. 

 pis. 10-13. figs. 14. 1907. 



2. Chamberlain, C. J. (Review). Bot. Gazette 40:391. 1905. 



3. Coker, W. C, Notes on the gametophytes and embryo of Podocarpus. 

 Bot. Gazette 33:89-107. pis. 3-7. 1902. 



4. Jeffrey, E. C, and Chrysler, M. A., On Cretaceous Pityoxyla. Bot. 

 Gazette 42:1-15. pis. 1, 2. 1906. 



5. , The microgametophyte of the Podocarpineae. Amer. Nat. 41:355- 



364. figs. 5. 1907. 



6. Juel, H. O., Ueber den Pollenschlauch von Cupressus. Flora 93:56-62. 

 pi. 3. 1904. 



7. Lawson, A. A., The gametophytes, archegonia, fertilization, and embryo 

 of Sequoia sempervirens. Annals of Botany 18:128. pis. 1-4. 1904. 



8. Lopriore, G., Ueber die Vielkernigkeit der Pollenkorner und Pollenschlauche 

 von Araucaria Bidwillii. Ber. Deutsch. Bot. Gesells. 23:335-346. pi. 15. 

 1905. 



9. Oliver, F. W., On the structure and affinities of Stephanospermum. Trans. 

 Linn. Soc. London II. 6:361-400. pis. 41-44. 1904. 



10. Renault, B., Structure compare de quelques tiges de la flora carbonifere. 

 1879. 



11. — , Coursde Bot. Foss. 4:1880-1884. Paris. 



12. Strasburger, E., Anlage des Embryosackes und Prothalliumbildung bei 

 der Eibe. Festschrift fur Haeckel 1-16. pis. 1, 2. Jena. 1904 



13. Thompson, R. B., Preliminary note on the Araucarineae. Science N. S. 

 22:85. 1905. 



14. Young, Miss M. S., The male gametophyte of Dacrydium. Bot. Gazette 

 44:189-196. pi. 19. 1907. 



EXPLANATION OF PLATES VIII AND IX 



The drawings were made with a Bausch and Lomb camera lucida and Zeiss 

 apochromatic lenses and compensating oculars. The plates have been reduced 

 one-half in reproduction. 



PLATE VIII 



(Figs. 1, 2, 5, 7-/7 are P. sp.; figs. 3, 4, 6 are P. totarra Hallii) 



Fig. 1. — Cross-section through the middle region of a staminate cone, show- 

 ing the relative position of sporophylls and sporangia (s), vascular bundles (vb), 

 and resin canals (re); the canals sometimes branch as shown at a. 



Fig. 2. — Cross-section of resin canal. 



Fig. 3. — Cross-section of vascular bundle from strobilus; px shows position 

 of protoxylem. 



Fig. 4. — Longitudinal section of a sporophyll, and one sporangium of a young 

 cone about 3 mm in length. 





