OF THE FOSSIL PLANTS OF THE COAL-MEASUEES. 
267 
membrane, g. Perispermic membrane, h. Parenchyma of the lagenostome. 
Enlarged 15 diameters. 
Fig. 61. Tangential section of the same made nearly in the plane of fig. 59, but on the 
opposite side of the seed. 
a. Testa, e. Lagenostome. e, e. Canopy, f. Nucular membrane, g. Peri- 
spermic membrane, h. Parenchyma of lagenostome. Enlarged 15 dia- 
meters. 
Fig. 62. Upper part of the section, fig. 61. Enlarged 80 diameters. 
Figs. 63 to 68. Series of longitudinal sections of a third specimen of Lagenostoma 
ovoides, of which fig. 67 is the central one, whilst fig. 68 exhibits the chalaza (i) 
and what appears to have been a funiculus, k. Enlarged 15 diameters. 
Fig. 69. Upper part of fig. 67, enlarged 80 diameters. 
a. Exotesta, b. Three folds of the canopy, c. Lagenostome. f,f. Nucular 
membrane probably united to the perispermic one. 
Fig. 70. Imperfect upper or apical portion of a fourth seed of Lagenostoma ovoides , 
with pollen-grains (l) lodged in the interior of the lagenostome, between its 
outer wall and the lagenostomal parenchyma. 
Fig. 71. Transverse section near the apex of Mr. Nield’s specimen of Lagenostoma 
ovoides. Enlarged 15 diameters. 
a. Exotesta, d. Lagenostome. e. Canopy. 
Fig. 72. Transverse section of the seed, fig. 71, made across the centre of the lagenostome. 
a. Testa, c. Membranous wall of the lagenostome. e. Canopy, h. Pa- 
renchyma of lagenostome. 1. Pollen-grains. n. Vertical columns of a 
. peculiar cellular tissue. Enlarged 30 diameters. 
Fig. 73. Parallel section to fig. 72, made interiorly to that figure. Enlarged 30 diameters. 
g. Apex of the perispermic membrane. 
Fig. 74. Prosenchymatous cells from the membranous wall of the lagenostome in 
fig. 70. Enlarged 175 diameters. 
Fig. 75. Portion of the perispermic membrane of fig. 73. Enlarged 175 diameters. 
Fig. 76. Vertical section through the dried endotesta and nucleus of the seed of a Salis- 
buria Adiantifolia. 
a. Endotesta. f. Nucular membrane, c. Cavity between the divided layers 
of the nucular membrane. 
Fig. 77. Vertical section through the centre of a seed of Lagenostoma physoides. 
b. Prosenchymatous endotesta (1). c. Lagenostome. d. Micropyle. e. Folds 
of canopy, n. Perisperm. Enlarged 15 diameters. 
Fig. 78. Tangential longitudinal section of fig. 77. 
Fig. 79. Enlarged representation of part of a section made near to fig. 77. 
b. Testa 1 c. Lagenostome. e. Parts of the canopy, g. Probably the 
united nucular and perispermic membranes, h. Parenchyma of interior of 
lagenostome. n. Nucleus. 
