176 BOTANICAL GAZETTE [SEPTEMBER 
LITERATURE CITED 
1. CALDWELL, Otis W., Microcycas calocoma. Bot. GAZETTE 44:118-I41. 
2. CHAMBERLAIN, C. J. (Review). Bot. GAZETTE 40:391. Igo 
- Coker, W. C., Notes on the gametophytes and embryo 2 Podocarpus. 
Bot. GAZETTE 33:89-107. pls. 5-7. 1g02. 
4. JEFFREY, E.C., and —e M. A., On Cretaceous Pityoxyla. Bot. 
GAZETTE 42:1-15. pls. 1, 2 : 
, The ee of the ies ace Amer. Nat. 41:355- 
w 
5- 
364. figs. 5 1907. 
6. JueEt, H. _ Ueber den Pollenschlauch von Cupressus. Flora 93:56-62. 
pl. 3. 190 
7. Lawson, x A., The gametophytes, archegonia, fertilization, and embryo 
of Sequota s saiariiehs Annals of Botany 18:128. pls. 1-4. 1904. 
8. Loprrore, G., Ueber die Vielkernigkeit der Pollenkérner und Pollenschlauche 
von deca Bidwillii. Ber. Deutsch. Bot. Gesells. 23:335-346- Pl. 15- 
1g05. 
9. OLIVER, F. W., On the structure and affinities of Stephanospermum. Trans. 
Linn. Soc. Landed II. 6: 361-400. pls. 41-44. 1904 
10. RENAULT, B., Structure comparé de quelques tiges de Ia flora carbonifére. 
1879. 
, Cours de Bot. Foss, 4:1880-1884. Paris. ~ 
12. STRASBURGER, E., Anlage des Embryosackes und Poh bei 
der Eibe. Festschrift fiir Haeckel 1-16. pls. 1, 2. Jena. 190 
13. THompson, R. B., Preliminary note on the Araucarineae. ‘Scie N. S. 
22:85. I905. 
14. YouNG, Miss M. S., The male gametophyte of Dacrydium. Bor. GAzeTT 
44:189-196. pl. 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 
one-half in reproduction, 
PLATE VIII 
(Figs. 1, 2, 5, 7-17 are P. sp.; figs. 3, 4, 6 are P. totarra Hallit) oS 
Fic. 1.—Cross-section through the middle region of a staminate cone, show- 
ing the relative position of sporophylls and sporangia (s), vascular bun bundles (ob), 
and resin canals (rc); the canals sometimes branch as shown at a. 
Fic. 2.—Cross-section of resin canal. 
Fic. 3.—Cross-section of vascular bundle from strobilus; px shows P? —_ 
of protoxylem 
Fic. ‘Lengo section of a sporophyll, and one sporangium of we 
cone about 3™™ in length. 
