99 
the Mycorrhiza of the Marattiaceae. 
38. Rayner, M. C. : Obligate Symbiosis in Calluna vulgaris . Ann. of Bot., vol. xxix, 1915. 
39. Rorer, J. B. : Pod-Rot, Canker, and Chupon-Wilt of Cacao caused by Phytophthora sp. 
Bull. Trinidad Dept, of Agric., vol. ix, No. 65, 1910. 
40. Shibata, K. : Cytologische Studien iiber die endotrophen Mykorrhizen. Pringsh. Jahrb. 
f. wiss. Bot., Bd. xxxvii, 1902. 
41. Stahl, E. : Der Sinn der Mycorhizenbildung. Pringsh. Jahrb. f. wiss. Bot., Bd. xxxiv, 1900. 
42. Ternetz, C. : Ueber die Assimilation des atmospharischen Stickstoffes durch Pilze. Pringsh. 
Jahrb. f. wiss. Bot., Bd. xliv, 1907. 
43. Treub, M. : Etudes sur les Lycopodiacees. Ann. Jard. Bot. de Buitenzorg, t. v, 1886. 
44. West, C. : Stigeosporium Marattiacearum , gen. et sp. nov. Ann. of Bot., vol. xxx, no. cxviii, 
1916. 
EXPLANATION OF FIGURES ON PLATE III. 
Illustrating Mr. C. West’s paper on Stigeosporium Marattiacearum and the Mycorrhiza of the 
Marattiaceae. 
Fig. 1. a-g. Resting spores of Stigeosporium Marattiacearum , showing different stages in 
development, a, b, c, d in optical section ; e,f.g in surface view. From roots of Angiopteris evecta , 
Iioifm. x 500. 
Fig. 2. Mature resting spores of Stigeosporium Marattiacearum in a root of Archangiopteris 
Henryi , Chr. et Gies. X 350. 
Fig. 3. Transverse section of a small root of Danaea alata , Sm., showing endophyte (end.) in 
the cortex. e..= endodermis ; jibr. 1 . = fibrous layer of the cortex ; rt. h. = root-hair. x 60. 
Fig. 4. Part of a transverse section of a small root of Danaea nodosa , Sm., showing endophyte 
(end.) in the outer layers of the cortex. Jibr. 1 . = fibrous layer ; myc. = intracellular mycelium ; 
t.c. = tannin cell; v. = vesicle, x 120. 
Fig. 5 A. Resting spores (sp.) of Stigeosporium Marattiacearum as they appear in a longitudinal 
section of a root of Angiopteris evecta , Hoffm. At x the intercellular mycelium of the fungus is 
clearly shown, x 30. 
Fig. 5 b. Part of the same more highly magnified to show wall-markings, x 120. 
Fig. 6. Part of a transverse section of a moderately large root of Angiopteris evecta , Hoffm., 
showing endophyte (end.) in the cortex. e. = endodermis ; sp. = resting spore ; t.c. = tannin cell, 
x 35- 
Fig. 7. Transverse section of a root of Marattia Cooperi, Mre., showing endophyte (end.) in the 
cortex, e. = endodermis ; m.c, = mucilage canal ; t.c. = tannin cell ; v. — vesicle. x 30. 
