102 
T. G. HALLE, 
(Schwed. Südpolar-Exp. 
described from the Lower Oolite of Northern Italy, whereas one other is doubtfully 
referred to a species of probably Middle Jurassic age, viz. Stachyopitys cfr. annu- 
lar ioides Shirley. The Antarctic Stachyopitys-iorm certainly comes very near to 
Shirley’s specimen, which is derived from plant-bearing beds in Queensland con- 
sidered to be of Middle Jurassic age. 
It appears from the above discussion that of the 22 species definitely identified 
with previously known forms, not less than 17 are found elsewhere in strata believed 
to be of Middle Jurassic age. 
There are only a few forms in the Hope Bay flora that may be taken to indicate 
a relation to older floras than those of the Middle Jurassic. Only two forms have 
been definitely referred to species characteristic of somewhat older strata, viz. Conio- 
pteris? lobata (Oldh.) and Otosaniites latior Sap. Coniopterisr lobata was described 
from the Rajmahal Group in India and has later been reported from the Liassic of 
Austria (KraSSER, 1908, p. 443). As has been set forth above, the Rajmahal flora 
may possibly be younger than the Liassic, which age was assigned to it by Feist- 
MANTEL, and besides the value of the identification of Coniopteris ? lobata is some- 
what lessened by the fact that the existing drawings of the Indian specimens are 
stated by Feistmantel not to be very accurate. Otosaniites latior is known from 
the Rhætic and Liassic of Europe and from the Triassic of North America. There 
are not wanting other indications of a relation to older floras, however. The two 
species referred to Pseudoctenis are more or less closely related to forms from the 
Rajmahal flora. One has been somewhat doubtfully referred to Pseudoctenis {Ptero- 
phylluni) Medlicottiana (Oldh. & MORR.) and the other, Pseudoctenis ensiformis^ 
though described as a new species, finds its closest ally in Pterophylluni Morrisia- 
num Oldh. & Morr. There are also some forms which appear to show a certain 
degree of affinity to species from the Rhætic and Liassic floras of the northern 
type. The form here referred to the new species Otosaniites linearis belongs to a 
type of frond which is very common in the Rhætic and Liassic of Europe and 
is represented by such forms as 0 . Bucklandi (Schenk) and 0 . gracilis (KuRR). 
No very great importance should be attached to these Otosaniites-iorms, however, 
since very much the same type of frond seems to have had a wide vertical distribu- 
tion, ranging from the Rhætic at least to the Lower Oolite. Finally, the new spe- 
cies described as Thinnfeldia constricta finds its nearest allies in Th. rhoniboidalis 
and Th. speciosa, mostly found in Rhætic and Liassic strata but occurring also higher 
up in the Jurassic, and in Th. indica of the Rajmahal flora in India. 
Such members of the Hope Bay flora as can be considered to indicate a higher 
horizon than the Middle Jurassic are hardly more important than those suggestive 
of an older age. With the exception of the Kimmeridgian flora of Scotland (Seward 
1911 rt), which is rather like that of the Lower Oolite, the floras of the Upper Jurassic 
