PEOFESSOE HEEE ON THE FOSSIL FLOEA OF NOETH (GREENLAND. 485 
and terminates in an acute point. Their suture is rectilineal, the outer margin slightly 
curved, the surface is densely covered with delicate points, not arranged in a series. 
Besides the elytra are lying some remains of the thorax. I have a similar well-preserved 
species from CEningen ( Cistelites spectabilis, Hr.), fig. 13, twice magn . ; the elytra are of 
the same size, form, and punctation, but the tip is obtuse. 
2. Cercopidium rugulosum , Hr., Plate XLIV. fig. 9 b, magn. 9 b, b. 
This is probably an elytron of a Cercopideous insect (Hemipteron), but the nervation 
is very different from that of the known fossil species (Hr. die Insectenfauna der Ter- 
tiargebilde von CEningen und von Iladoboj, iii. p. 93). It is 9 millims. in length and 
breadth, pretty rough, and strongly tapered at the base. The dorsal line is straight, the 
ventral line curved, obtusely rounded outwards. Two veins spring from the base, 
forking in two branches, and united by transverse veins. Small areolae join them. The 
whole surface is provided with very small transverse stripes, only visible with a lens. 
The surface appears finely furrowed. 
B. Mollusca. 
3. Cyclas, sp., Plate LIE fig. 10, magn. 10 b. 
Dr. Charles Mayer has examined this species, and communicated to me the following 
observations : — This unfortunately incomplete shell must very probably be referred to 
the genus Cyclas. The size, the round and convex shape, the thin granulated shell and 
concentric striae are those of existing Cyclas. This shell does not agree so well with the 
nearly related genus Pisidium, which is everywhere unequilateral, and almost tri- or 
quadrangular. Of the second section of the genus Cyclas (including the irregularly 
striated species) the section of Cyclas rivularis alone can be taken into consideration. It 
is of the same size, is of a convex shape, and has distinct transverse striae. The condi- 
tion of the shell does not, however, allow of its identification. 
Explanation op the Plates. 
PLATE XXXIX. 
Fig. 1-3, Aspidium Meyeri, Hr. 1 : a a, magn., the sori with the indusia; f f sori 
with the sporangia ; b b, d d, h h, the pinnules magn. Fig. 3 b, Legumino- 
sites, sp. Figs. 4, 5, Aspidium Heerii , Ett. Fig. 4 b, Salix BaeanaX Fig. 6 a, 
Aspidium ursinum, Hr. ; b, Platanus. Fig. 7, Dryandra acutiloba, Brgn., sp. 
Fig. 7 b, Diospyros X 
PLATE XL. 
Figs. 1-5 a , Hemitelites Torelli , Hr., 4 magn. Figs. 5 c, d, 7, Cornus ferox , Ung. 
Fig. 5 b , Sequoia Langsdorfii , Br., sp. Fig. 5 e, BJms arctica, Hr. Fig. 6, 
Woodwardites arcticus , Hr. 
mhccclxix. 3 t 
