524 Shove.—On the Strue hire of the 
Sachs, J., 74 : Lehrbuch der Botanik, 4. Aufl. Leipzig, 1874, P* 4 Z 5 - 
Schenck, H., ’86 : Ueber die Stabchen in den Parenchymintercellularraumen der 
Marattiaceen. Ber. der deutsch. Bot. Gesellsch., 1886. 
Schwendener, S., ’82 : Ueber Scheitelwachstum der' Phanerogamenwurzeln. 
Sitzb. Konigl. Akad. d. Wiss. Berlin, 1882. 
Seward, A. C., ’99 : On the Structure and Affinities of Matonia pectinata. Phil. 
Trans. Roy. Soc. London, 1899. 
Van Tieghem, P., ’ 91 : Traite de Botanique. Paris, 1891. 
de Vriese, P., and Harting, ’ 53 : Monographic des Marattiacees. Leide et 
Diisseldorf, 1853. 
EXPLANATION OF PLATES XXVIII AND XXIX. 
Illustrating Miss Shove’s paper on Angiopteris. 
PLATE XXVIII. 
Angiopteris evecta. 
Fig. 1. Piece of stem showing bare base, roots (r), and lower leaves, l, lenti- 
cels; P, petioles ; S, stipules. 
Fig. 2. Diagrammatic transverse section of mature stem after removal of leaves. 
R, roots ; P.P, protophloem; P.x, protoxylem. 
Fig. 3. Longitudinal section of young frond. s, outer stipule; s 1 , inner 
stipule. 
Fig. 4. Transverse section of young frond taken along the line AB in Fig. 3. 
p, circinnately coiled petiole; s 1 , inner stipule; s, outer stipule. Line a 1 b 1 
corresponds in position to line AB. 
Fig. 5. Portion of the vascular network from the upper side of the stem. 
r, roots. 
a , strands belonging to leaf VI. 
^ }) V. 
* „ >, „ iv. 
d j? » II. 
e 11 >) I * 
/ „ „ „ HI- 
Dotted lines show strands of third zone. Shaded strands belong to second zone. 
A, B, C, D, points of union of strand from second zone, compensating for the 
departure of the strands e of the first zone into leaf I, with the vascular tissue of 
first zone. M, N, P, similar points in case of strand compensating for the departure 
of the strands c into leaf IV. 
e, f, g, h, points of union of strands of third zone with those of second zone. 
