236 PROF. R. J. HARVEY GIBSON ON THE AXILLARY 
the order." There is no desire, so far as I am aware, to homo- 
gise the *stipules " of Marattia with the ligules of the Selagi- 
nellaceæ ; and I scarcely think the lateral displacement of the 
scales in such a type as Halophila justifies us in drawing more 
than an analogy between them and the stipular leaf-appendages 
so rare in leaves with broad insertions, but so common a feature 
in dieotyledonous morphology. 
BIBLIOGRAPHY. 
1. Ginsow, R. J. Harvey.—Contributions to a Knowledge of 
the Anatomy of the Genus Selaginella, Spr.: Pt. iii. 
Annals of Botany, No. xxxvii. 1896. 
2. HovknAcquE, M.—Recherches sur le Lepidodendron sela- 
ginoides. Mém. de la Soc. Linnéenne de Normandie, xvii. 
(Caen) 1892. 
3. MasrLEN, A. J.— The Ligule in Lepidostrobus. Annals of 
Botany, vol. xii. (1898) p. 256. 
4. Scorr, D. H.—Studies in Fossil Botany. London, 1900. 
5. Borner, J. B. E.—Recherches sur le Phucagrostis major, 
Cavol. Ann. des Sc. Nat. 5* sér. i. p. 22. 
6. Inurscn, T.— Ueber einige Arten aus der natürliches Pflan- 
zenfamilie der Potameen. Berlin, 1858. 
7. DurAiLLy, D. E. R. G.— Observations sur Tl Aponogeton 
distachyum. Assoc. Fr. pour l'avancement des Sciences, 1875. 
8. Norre, E. F.—Botanische Bemerkungen über Stratiotes und 
Sagittaria. Kopenhagen, 1825. 
9. Durarrry, D. E. R. G.—Observations sur le Menyanthes et 
I Hydrocleis. Bull. mens. de la Soc. Linnéenne de Paris, 1878. 
10. Banrovm, I. BaAvrky.—On the Genus Halophila. Trans. 
Bot. Soe. Edinb., Sess. 1877-8. 
11. 7d.—On the Morphology of Halophila. Journ. of Botany, 
xvi. (1878) pp. 290-294. 
12. MUnrer, J. F.—Entwicklungs Vorgänge bei Vallisneria 
spiralis. — Hanstein's Abhandl., Bd. ii. Heft rv. (1878) 
pp. 31-70. 
13. PurrrrEvx, E.— Recherches sur le Végétation et la Structure 
de I Althenia filiformis. Ann. des Sc. Nat. 5° sér. ii. (1864) 
pp- 169-190, tt. 15, 16. 
14. Bucnenav, F.—Beitrüge zur Kenntniss der Butomaceen, 
Alismaeeen und Juncaginaceen. Engler’s Jahrb. ii. (1882) 
pp. 465-510. 
