OF COAL-MEASURE PLANT-IMPRESSIONS, | 203 
to the last specimen, but the leaf bases are rather smaller, measuring 5 or 
5'5 mm. in length and only 2:5 to 3 mm. in breadth. The upper angle of 
the base is also rather more pointed than in the last specimen. The leaf sear 
prints are particularly clear. 
No. 959. Prominent leaf bases from another specimen from the Middle 
Coal Measures of Cumberland are seen enlarged on PI, 18. fig. 30. These 
show the sub-imbricate arrangement of bases, the rounded upper angle, and 
apical leaf scar. The leaf bases are here as high as broad (5 mm.). 
No. 3109. Part of a further specimen from the Transition Coal Measures 
of Kent is seen natural size on Pl. 13. fig. 31, and enlarged three times in 
fig. 32. The leaf bases here measure about 4 mm. each way. The leaf scar 
is clearly oblique and placed considerably below the angle of the leaf base, 
and nearly all its sides and angles are equal. There is no appearance of 
any keel. 
No. 1645, Passing next to fusiform types, the specimen from the Upper 
Coal Measures of the Forest of Dean, figured on Pl. 13. fig. 33, natural size, 
and in fig. 34, enlarged twice, is a good example of a type with compara- 
tively large leaf bases. They measure 10°5 mm. by 5 mm. across. The base 
is fusiform, with attenuated and sharp upper and lower angles. The leaf scar 
is set obliquely slightly above the centre of the base and occupies two-thirds 
of its breadth. The lateral and lower angles are sharp, but the upper is 
slightly rounded. The leaf-scar prints are clear. A keel is present, but 
is not very prominent, and has no ornamentation. There is no keel above 
the leaf scar. 
No. 1953. Part of another specimen from the Upper Coal Measures of 
the Forest of Dean is shown enlarged on Pl. 18. fig. 35. The leaf bases 
here measure about 10 mm. by 4mm. The leaf scar is prominent and the 
keel is well marked without ornamentation. | 
No. 3130. Another specimen from the Transition Coal Measures of the 
Kent Coalfield is seen on Pl. 18. fig. 36, natural size, and in fig. 37, enlarged 
three times. The leaf bases are here very long (7 mm.) in proportion to 
their breadth (1:9 mm.). The keel is very faint. 
Figured Examples incorrectly or doubtfully identified with the Plant 
here termed L, loricatum, sp. nova. 
Owing to the confusion which has arisen from the fact that Sternberg 
included at least two different plants under the name L. dichotomum, few, if 
any, of the synonyms previously published have any bearing on the fossil 
here under consideration. Schimper’s (25. ii. p. 20) synonymy may be 
passed by as foreign to this question. Zeiller, who published the first good 
figures of the species here termed L. loricutum, includes a number of 
references which I should reject, especially the inclusion of Sternberg's 
LINN. JOURN.—BOTANY, VOL. XLVI. Q 
