175 
Other Specimens .—159 and 162, allotment 53a, Jumbunna ; 183, allotment 
32a, Kongwak. 
Thinnfeldia sp. 
Fig. 29. 
Fig. 29 (Specimen 90).—An imperfect leaflet rather more than 3cm. long, 
characterized by a distinct midrib, and curved dichotomously branched lateral 
veins. The specimen is too small to determine with certainty, but it may 
be compared with FeistmantePs Thinnfeldia indica from the Rajmahal Hills,* 
and with T. indica, var. media, as figured by Shirley.f 
Locality .—Allotment 49. Jumbunna. 
Specimen 89, allotment 49, Jumbunna, is no doubt a smaller piece of the 
the same form. 
GENUS RHIZOMOPTERIS, SCHIMPER. 
Rhizomopteris Etheridgei, sp. nov. 
Figs. 30-34. 
The specimens included under this name are unfortunately very fragmen¬ 
tary, but they seem to be of sufficient interest to be referred to a distinct species. 
A full diagnosis is from the nature of the material impossible, but the following 
description of the figured fragments will serve to indicate what I believe to be 
their most likely interpretation. 
Fig. 30 (226, Coal Creek Mine, Korumburra).—This stem fragment shows 
three oval scars about 3mm. broad, two of which are seen in the figure ; it 
presents a characteristic appearance when seen under a low magnifying power, 
the surface bears numerous and very small pits arranged in irregular transverse 
lines, which present the appearance of fine sculpturing ; this feature is too 
small to show in a drawing such as that of Fig. 30, represented natural size, 
but is clearly seen in the enlarged drawing from another specimen (227, Coal 
Creek Mine, Korumburra), reproduced in Fig. 32. In addition to this minute 
sculpturing there are a few pits or scars having the form of a circular depression, 
about 5mm. in diameter, enclosing a central smaller pit as seen in Fig. 30a. 
A few of the pits are also shown, natural size, in Fig. 30. 
Figs. 31 and 32 (227, Coal Creek Mine, Korumburra).—A fragment similar 
to 226 (Fig. 30) ; one of the larger scars and the fine surface-sculpturing are 
shown in Fig. 32. Fig. 32 exhibits more clearly the nature of the larger scars, 
which have the form of an oval projection lying in a slight depression, and 
exhibiting a broad U-shaped groove with the free ends bent inwards. 
Fig. 33 (228, Coal Creek Mine, Korumburra).—In this specimen none of 
the larger scars are seen, but the surface of the stem bears numerous circular 
scars or pits similar to those represented in Figs. 30 and 30a. By the side of 
this stem-fragment one sees on the surface of the rock several impressions of 
small linear appendages lying obliquely to the stem. These may well be slender 
roots which were attached by a circular base to the stem ; the small scars of 
Figs. 30 and 33 probably represent the points of exit of these adventitious 
roots, the central dot in the middle of each of the scars (Fig. 30a) marking the 
position of the single vascular bundle with which each root was supplied. 
* Feistmantel (77), PI. XXXIX. 
t Shirley (98), PI. V., Fig. 1. 
