142 BOTANICAL GAZETTE [OCTOBER 
Fic. 5.—Transverse section of mature specimen, showing many of loculi 
with ripe spores, some of which, owing probably to solution of loculus wall, 
lie free’in ground tissue; rough diagram of this section given in text fig. 4 
(CN .411.31); X37 deities: 
Fic. 6.—High power photograph of ea ground tissue of obliquely 
longitudinal section, showing highly organized nerve ending (ve), various 
horizontal sclerotic plates, and succulent ground tissue like that of sarcotesta 
of Trigonocarpeae; in original, striated elements of transfusion tissue can be 
seen above nerve ending (CN .304.2); zoo diameters. 
Fic. 7.—Transverse section through upper part of synangium, showing 
central loculi and position of nerve ending (CN.411.12); 18 diameters. 
PLATE V 
Fics. 8, 9.—Two sections across another synangium, showing position of 
loculi in spite of some degree of maceration and subsequent shrinkage; in 
fig. 8 plane is nearer apex; surface is seen abutting on other tissues in matrix; 
in none of the four sections of this series are spores to be detected; fig. 8 . 
(CN 2391.23), X25 diameters; fig. 9 (CN.391.24), X40 diameters. 
Fic. 1o.—Nearly peripheral tangential section, showing in original the 
transversely oriented series of loculi, of which majority show tetrads of spores; 
cf. text fig. 3, constructed from two successive longitudinal sections; it is given 
to show transversely running strand (vb), for which reason the rest is slightly 
over exposed (CN .386.17); 42 diameters. 
Fics. 11, 12.—T wo successive transverse sections of class I synangium, 
in which spores are free from one another and all loculi are full of them; syn- 
angium had undergone some degree of maceration, as shown by sclerotic plates 
(sp), cells of which show partial solution of middle lamella; key provided for 
fig. 12 in text fig. 6, to indicate position of sclerotic plates, loculi, etc., which 
are clearer in the fossil, although many of the walls have given way; fig. 11 
(CN .307.17), X27 diameters; fig. 12 (CN.307.18), X50 diameters. 
Fic. 13.—Transverse section clearly showing vertical sclerotic plates 
(usp); most of loculi have perished, but one is indicated (J); several others are 
easily detected in the slide (CN.393.6A); X32 diameters. 
