372 
It is significant to find that all the associated plants at this 
place are new to Tasmania, viz., Tentopteris Tasmanica mihi ; 
Rhacopteris Feistmantelii, mihi; Thinnfeldia media, Woods 
closely resembling 1. indica, Sphenopteris elongata, Carr. and 
a form having the characters of the genus T’richomanides (T. 
Littingshauseni, mihi). The prevailing forms of the Tasmanian 
Coal Measures as represented at Jerusalem, New Town, 
Oatlands, Longford, Fingal, Ben Lomond, and Seymour, 
could not be traced among those mentioned. 
The prevailing forms throughout the Upper Coal 
Measures are Pecopteris Australis (Mor) ; Sphenopteris lobi- 
folia (Mor); S. alata, Br.; 8. plumosa, Br.; Zeugophyllites 
elongatus (Mor); -Phyllotheca Australis, Br.; P. ramosa 
(M’Coy); P. Hookeri (M’Coy). 
THINNFELDIA ODONTOPTEROIDES (Morris). 
Variety superba (Johnston). 
Frond bipinnate, large and graceful; pinna forking, 
dichotomous, contained angle of fork 48 degrees ; segments of 
pinuules invariably cleft close to rhachis leaving a continuous: 
wing along the latter, against which the broad bases of the 
pinnules are attached; the pinnules below the fork are broader 
than long, squarish, and become increasingly obtusely lobed 
on the upper marginal shoulder, the lower margin becoming 
gently rounded, thence parallel, and close to upper margin 
of the subjacent pinnules, all of which usually run 
into rhachis wing ata right angle. Pinnules at and above 
fork gradually lose the squarish appearance, are variably 
curved, broadly lanceolate and spreading, length greater than 
breadth at base, frequently becoming simply lanceolate towards. 
apex; inner pinnules of fork generally smaller. Neuration 
fine, and forking repeatedly as in T. falcata from which it only 
differs in having a winged rhachis and in being a very much 
larger form. Rhachis strong, grooved; extreme length of 
pinnules below fork, 11 millimetres; above fork, 39 milli- 
metres; average breadth of pinnules below fork, 18 milli- 
metres; above fork, 12 millimetres. 
This magnificent form occurs in shales associated with 
the coal seam at Spring Bay where it is associated with 
Sphenopteris elongata. (Carr.) P. caudatus, mihi, and P. 
trilobita, mihi. te 
THINNFELDIA TRILOBITA. (Nov. Sp.). 
Frond bipinnate (?), pinne, linear elongate, dichotomously 
divided ; pinnules pinnatfid, coriaceous, oblique, opposite 
trincately narrowly strap-shaped, invariably terminating in 
three variably shaped digits or lobes, the central one of which 
is usually the most prominent; veins obscure, not well 
defined. Adjacent margins of pinnules run closely parallel 
