268 
PROFESSOR W. C. WILLIAMSON ON THE ORGANIZATION 
Fig. 80. Conostoma oblonga. Vertical section. 
a. Testa, c. Cavity, probably occupied by a prolongation of the nucleus. 
f. Nucular membrane, g. Perispermic membrane, h. Parenchyma of the 
lagenostome 1 Enlarged 15 diameters. 
Fig. 80«. Vertical section of the detached apex of the testa of fig. 80. Enlarged 35 
diameters. 
Fig 80*. Tangential section of fig. 79 passing outside the parenchyma of the lagenostome. 
Fig. 81. Tangential section of fig. 80 made yet more peripherally than fig. 80*. 
Fig. 82. Conostoma ovalis. Longitudinal section. 
a. Testa, b. Endotesta. f. Nucular membrane, g. Perispermic mem- 
brane. h. Parenchyma of the lagenostome 1 n. Perisperm. Enlarged 
22 diameters. 
Fig. 83. Upper part of fig. 82. 
a. Testa, b. Endotesta. c. Lagenostome ! c'. Prosenchymatous wall of 
the lagenostome, with its inverted funnel-shaped entrance, f. Nucular mem- 
brane. f,g. Nucular and perispermic membranes united, h. Parenchyma of 
the lagenostome 1 n. Nucleus. Enlarged 60 diameters. 
Fig. 84. Oblique section of a second specimen made in the direction of the line, fig. 82, xx. 
a. Testa, c. Lagenostome! c'. Walls of the funnel-shaped lagenostome. 
f. Divisions of the nucular membrane, h. Parenchyma of lagenostome. 
Enlarged 22 diameters. 
Fig. 85. Small seed allied to Conostoma. From Mr. Aitken’s Cabinet. Nat. size. 
Fig. 86. Vertical section through the centre of Mr. Butterworth’s specimen of Cono- 
stoma oblonga. 
a. Testa, c. Cavity, corresponding to c in fig. 79. d. Micropyle. f. Sub- 
divisions of the nucular membrane enclosing the lagenostomal cavity with its 
parenchyma, p. f,g. Nucular and perispermic membranes united 1 
Fig. 87. Conostom% intermedia. Longitudinal section, probably not quite central. 
Enlarged 15 diameters. 
a. Testa, b. Endotesta! f. Nucular membrane, h. Parenchyma; pro- 
bably a remnant of the perisperm. 
Figs. 88-93. Malacotesta oblonga. Five longitudinal and tangential sections, of which 
fig. 93 is the most central at the chalazal end of the seed, and fig. 92 at its apex. 
Fig. 88 is the upper extremity of fig. 92, enlarged 50 diameters. The others 
are enlarged 15 diameters. 
a. Sarcotesta. b. Hard endotesta. c. Lagenostome. d. Micropyle. 
f. Nucular membrane, g. Perispermic membrane, h. Parenchymatous 
tube of the micropyle. i. Chalaza. k. Funiculus. 
Fig. 94. Sandstone cast of the interior of the testa of Trigonocarpon olivceforme , showing 
the rounded exterior of the nucleus with two of the narrow radial extensions 
of the endotestal cavity and the prolonged triangular terminal microplye. 
