Notes and Comments. 345 
ON A NEW TYPE OF GINKGOALIAN LEAF, 
With the above heading, Mr. H. Hamshaw Thomas read an 
interesting note to the Botanical Section. He stated that in 
the Jurassic plant-bed of Cayton Bay, near Scarborough, a 
number of beautifully preserved leaves occur which belong to a 
newtype. They are linear or oblanceolate in shape, with round- 
ed or slightly bifurcated apices, short petioles, and dichoto- 
mising venation. The leaves are usually found in a mummified 
state; they can be readily detached from the rock, and yield 
beautiful cuticular preparations. The form of the stomata and 
subsidiary cells is very similar to that of other Ginkgoalian 
leaves, while they possessed the secretory tracts between the 
veins as seen in the modern form. The epidermal cells possess 
very characteristic papillae. These leaves form the type of a 
new genus Evetmophyllum, with two species, a second form 
having been found at Whitby. The specimens provide a 
further illustration of the importance of the Ginkgoales in the 
Mesozoic vegetation, while they are an example of the interest- 
ing preservation of some Yorkshire plants and of the importance 
of the study of cuticular structure. 
A NEW SPECIES OF MEDULLOSA FROM THE COAL. 
Dr. E. de Fraine described a specimen which consisted of a 
short length of stem surrounded by adherent leaf-bases, and 
occurred in a coal-ball obtained from the Lower Coal Measures 
of Lancashire. The stem was of small size, the diameters of 
the transverse section being only 5 cms. x 1.5 cm., including the 
leaf-bases. The vascular system of the stem consisted in the 
upper sections of three irregularly shaped outer steles, roughly 
triangular in outline; one of these steles branched during the 
length of stem available so that the lower sections of the series 
show a ring of four steles. The outer ring of steles encircles a 
small central strand or ‘ star ring,’ which undergoes no change 
during the series, and forms the characteristic feature of the 
fossil. A narrow zone of periderm enclosed the vascular tissues 
of the stem. The numerous leaf-traces passed out from the 
peripheral parts of the outer steles. The leaf-bases showed a 
typical Myeloxylon structure with numerous exarch collateral 
bundles and abundant gum canals, and the hypoderma was of 
the Myeloxylon Landriotii type. In the general structure of the 
steles and of the leaf-bases and in its histological details the 
stem shows a very close resemblance to Wedullosa anglica. 
JURASSIC FLORA OF YORKSHIRE. 
The Committee for the investigation of the Jurassic Flora 
of Yorkshire reported :—‘ The work of the year has been very 
satisfactory. The rich plant-beds exposed on and near Rose- 
berry Topping have been carefully examined and have yielded a 
large number of interesting forms, several of which are new to 
1913 Oct. 1. 
