134 THE ROYAL SOCIETY OF CANADA 
curved tips, may be examples of the fertile pinnæ from which the fruit 
has fallen. The rachis and pinnate branches of Figure 1 of the same 
plate, are similar to the stouter part of the fruiting stem of the Silurian 
plant above cited, except that the terminal branches are more slender; 
in both genera these branches are regularly pinnate. 
Sphenopteris flaccida Crep.is also an interesting species. The main 
stems are said to be sometimes 10 centimetres (3-4 inches) across, and 
being striated lengthwise resemble the fragments of leaves of Cordaites; 
but they are also like the stems of Aneïmites acadica of Dawson and indi- 
cate a plant of large size; like the latter species they show a small re- 
curved branch at the principal bifurcations; in Aneimites this small 
branch bears the fruit. 
M. Crepin claims that his Palæopteris [Archeopteris] hibernica v. 
minor, as he designates this plant, is a small form of P. hibernica Schim- 
per; he also expresses the opinion that Cyclopteris Roemeriana Gopp,* 
(P. Roemeriana, Sch.) is identical with it. The remains of this species 
found by M. Crepin were chiefly barren fronds, and the fertile fronds 
were very scarce. The fronds of the variety found in Belgium are 
only half of the size of the original type described from Kiltorkan in 
Ireland. 
“Palæopteris hibernica according to Schimper belongs to an epoch 
of which the formations are intermediate between the Devonian and 
the Coal Measures. This intermediate group he calls the Palæanth- 
racitic, and divides it into three parts, the lower corresponding to the 
Upper Grauwacke of the German geologists; this is called by O. Heer, 
Groupe de l’isle des Ours, (Ursa Stage); it will be seen farther on how 
A.G. Nathorst shows that the Ursa stage should be included in the Devon- 
ian. The second group includes the Carboniferous limestone, and the third 
the slates or shales with the bivalve Posidonomia the so called “Culm”. 
This whole group of strata was once united with the Devonian 
terrain’. . . . . So far, as the locality of Evieux is concerned the 
beds there contain Triphyllopteris eleganst which Schimper refers to 
the Devonian. . . . 1’. elegans is from the beds with Cypridina, which 
according to Schimper are of the upper stage of the Devonian, while 
the sandstone of Kiltorken having P. Hibernica and the slates with 
Spirifer Verneulii, Murch., characterized by P. Roemeriana are part of 
another stratigraphical series.” 
*Foss. Flor. der Silur. der Devon. und der Under kohlen Form. p. 73, t. xxxvii 
fig. 8. 
fNathorst remarks that this species is quite similar to his Sphenopteridium 
Keilhaui from Bear Island in the Arctic Sea, and it is doubtful whether it should be 
referred to Unger’s species (T. elegans). 
