164 Benson. — Telangium Scotti, a new Species of 
v. Fig. 5 B, ep. This should be compared with Fig. 8, ep., where the free apex 
may be seen still containing spores. 
The spores seem to have been ripe, and in most cases have been 
partially shed. In one sporange in Slide C.N. . M . 21 (a) from Sharney Ford, 
kindly lent me by Prof. Oliver, there are numerous spores. Fig. 6, a , b, c, d , 
are drawings of such spores made with the help of Zeiss’s Abbe Camera, 
and show the form and characteristic wall of the spore. The spores vary 
slightly in size and form. Many are somewhat elliptical, measuring from 
5 to 6 ix in the longer dimension, and from 4 to 3*5 \i in the shorter. Many 
look circular, but this may of course be due to the elliptical forms being 
looked at end-on. They are reticulately marked, the ridges meeting at an 
angle of about 120°, and the thinner areas are approximately hexagonal. 
In form and in the character of the wall these spores agree very closely 
with the pollen-grains in the pollen-chamber of Lagenostoma ovoides , which 
are drawn in Fig. 6, e , f g. The size of the latter 
is, however, slightly greater. Those in the pollen- 
chamber of a Lagenostoma ovoides in my collection 
measure 6-75, and 7-2^ in the longer dimension 
and 5 /x in the shorter. An increase in size of 
a pollen- grain after entering the pollen-chamber 
is known to occur. In the interesting parallel case 
recorded by Renault of the pollen-grains of Cordai- 
anthus the shagreen-like coats of the spores were 
similar, but the size of those in the pollen-chamber 
showed a marked increase. We are now in a position to construct a 
diagrammatic figure if we superpose these sections upon one another, 
and the result is given to scale in Fig. 10. Septicidal dehiscence has 
advanced almost to the base of the synangium. 
It will be seen how closely this resembles some of the Calymmatotheca 
impressions, which are reproduced for comparison (Figs. 11 and 12 and 
Text-Fig. 33). Stur’s drawings of Calymmatotheca Stangeri (Fig. 11) show 
a form very similar to that of C. Scotti, except that the former is dis- 
tinctly larger, measuring 6 to 8 mm. in length, whereas C. Scotti , even 
if we take account of the sterile base, can hardly have reached more than 
5 '5 mm. 
But the chief difference is due to the absence of relief in the impres- 
sion, which in this respect offers a sharp contrast to the form reproduced 
photographically in Text-Fig. 33. The many specimens of the latter I have 
seen lead me to wholly agree with Mr. Kidston’s interpretation of it as 
sporangial, and I shall, for convenience, therefore refer to this species 
as Telangium affine. The same may be said of the other British 
species which will be referred to under the names Telangium asteroides and 
T. bifidum. 
