Anatomy of Teratological Seedlings . IV. 491 
of other workers on the anatomy of teratological syncotyls and of species 
normally pseudo-monocotyledonous, renders probable the view that many 
Monocotyledons have arisen from Dicotyledons by a process of unilateral 
syncotyly. 
The authors desire to acknowledge their indebtedness to Professor 
J. W. Carr, University College, Nottingham, for the facilities granted in 
connexion with this investigation. 
University College, 
Nottingham. 
Bibliography. 
1. Bexon, D. : Observations on the Anatomy of Teratological Seedlings. II. On the Anatomy 
of some Polycotylous Seedlings of Centranthus ruber. Ann. Bot., xxxiv, 1920. 
2. Bower, F. O. : On Leaf Architecture as illuminated by the Study of Pteridophyta. (Postscript.) 
Trans. Roy. Soc., Edin., li. pt. 3, 1916. 
3. Bancroft, N. : A Review of Literature concerning the Evolution of Monocotyledons. New 
Phyt., xiii, 1914. 
4 . Chauveaud, G. : L’appareil conducteur des plantes vasculaires. Ann. Sci. Nat. (Bot.), 9 e ser., 
t. xiii, 1911. 
5. Compton, R. H. : An Investigation of the Seedling Structure in the Leguminosae. Journ. 
Linn. Soc., Bot., xli, No. 279. 
6. : An Anatomical Study of Syncotyly and Schizocotyly. Ann. Bot., xxviii, 
i9*3- 
7. Coulter, J. M. : The Origin of Monocotyledony. II. Grasses. Ann. Missouri Bot. Gard., 
ii, 1915. 
8. — , and Land, W. J. G. : The Origin of Monocotyledony. Bot. Gaz., lvii, 1914. 
9. Davey, A. J. : Seedling Anatomy of certain Amentiferae. Ann. Bot., xxx, 1916. 
10 . de Fraine, E. : The Seedling Anatomy of certain Cactaceae. Ann. Bot., xxiv, 1910. 
11. Dodel, A. : Der Uebergang des Dicotyledonen-Stengels in die Pfahl-Wurzel. Pringsh. Jahrb., 
viii, 1872. 
12. Farrell, M. E. : The Ovary and Embryo of Cyrtanthus sanguineus. Bot. Gaz., lvii, 1914. 
13. Goebel, K. : Organography of Plants, Part II. English Edition, 1905. 
14. Hill, A. W. : The Morphology and Seedling Structure of the Geophilous Species of Peperomia. 
Ann. Bot., xx, 1906. 
15. : The Seedlings of certain Pseudo-Monocotyledons. British Assoc. Rept., Section 
K, 1906. 
16. Hill, T. G., and de Fraine, E. : On the Seedling Structure of the Gymnosperms, I-IV. Ann. 
Bot., xxii-xxiv, 1908-10. 
17. : The Seedling Structure of certain Centrospermae. Ibid., 
xxvi, 1912. 
18. Holden, H. S. : Observations on the Anatomy of Teratological Seedlings. III. The Anatomy 
of some Atypical Seedlings of Impatiens Roylei , Walp. Ann. Bot., xxxiv, 1920. 
19. , and Bexon, D. : Observations on the Anatomy of Teratological Seedlings. 
1. The Anatomy of some Polycotylous Seedlings of Cheiranthus Cheiri. Ann. Bot., 
xxxii, 1918. 
20. Kidston, R., and Lang, \V. H. : On Old Red Sandstone Plants showing Structure from the 
Rhynie Chert Bed, Aberdeenshire. Trans. Roy. Soc., Edin., li, pt. 3, 1915-17; lii, pt. 3, 
1919-20. 
21. Lee, E. : Observations on the Seedling Anatomy of certain Sympetalae. I. Tubiflorae. Ann. 
Bot., xxvi, 1912. 
