British Coal Measures. 
IOI 
Seed small, oval or elliptical or almost orbicular, between 6-10 mm. 
along the greatest diameter, both extremities rounded or more or less 
pointed. 
Genus Megalospermum, gen. nova. 
Seeds very large, 6-10 cm. long, subcircular or elliptical, blunt at both 
ends, without longitudinal ridges. Testa ornamented by a series of close, 
fine, thread-like striae. 
Megalospermum Wildi (Kidst.) (PI. VII, Fig. 38). 
Type Carpolithus Wildii , Kidston, ‘Trans. Manchester Geol. Soc./ 
vol. xxi, p. 408, Fig. on p. 408. Recorded from the Middle Coal Measures 
of the South Lancashire coalfield. 
Seed oblong, 6 cm. long and 3 cm. broad, rounded at the apex, very 
slightly narrowed at the base, stalked. 
Genus Radiospermum, gen. nova. 
Seeds cylindrical or ellipsoidal in form, longer than broad, not winged, 
apex with or without notches or lobes. Testa smooth, with or without a few 
distant longitudinal ridges but not striated longitudinally. Seeds with or 
without a cupule. 
(1) Radiospermum elongatum , sp. nova (PL VII, Figs. 42-43). 
Types Nos. 2177 and 2990, Carbon. Plant Coll., Sedgwick Museum, 
Camb. From the Upper Coal Measures of Radstock and Bishop Sutton, 
Somersetshire. 
Seed oval or elongately elliptical, 3*5-4*5 cm. long and 1*3-1 *5 cm. 
across, slightly rounded at both ends. Testa smooth, with very slight, 
distant longitudinal ribs, about 2 mm. apart at a point midway between 
base and apex. 
(2) Radiospermum grande, sp. nova (PI. VIII, Figs. 44, 45). 
Type No. 1668, Carbon. Plant Coll., Sedgwick Museum, Camb. Known 
from the Upper Coal Measures of the Radstock and Forest of Dean coal- 
fields, and the Middle Coal Measures of South Lancashire (No. 5258 4 in 
the Brit. Mus. Nat. Hist.). 
Seed large, cylindrical, broadly rounded at each end, 3-5 cm. long, 
2 *5-3*5 cm. broad. Testa smooth, with three longitudinal, rounded ribs, and 
short, discontinuous, microscopic grooves. 
(3) Radiospermum inflatum (Lesq.) (Text-fig. 8). 
Type Rhabdocarpus inflatus, Lesquereux, ‘ Coal Flora Pennsylv./ vol. iii, 
p. P. 815, PI. CX, Fig. 36, 1884. Recorded from the Middle Coal Measures 
of Yorkshire and South Lancashire. 
Seed large, up to 4 cm. long, ovoid, broadly rounded at one end and 
obtusely pointed at the other. Testa smooth, wrinkled, without ribs 
or striae. 
