136 
Records of the Geological Survey of India. 
[vol. x. 
3. Oncopteris Nettioalli, Dorm. Prom Cenoman sandstone, Kaunie (Bohemia). 
1853. Krejci, 1. c., and 1872 Feistmantel 1. c. 
4. Protopteris Buvignieri. —From cretaceous near Grand Pro (Dpt. Ardennes). 
1849. Brongniart Tableaux dos genres, d. vegdt. foss., p. 111. 
5. Caulopteris cyatheoides, Unger. Prom Neocomian near Ischl in Austria. 
1867. Unger, in SiUb. d. k. Acad. d. Wissenach. Vol. LV, p. 643—649, Tab. I, f. 1—4. 
There are therefore up to date five species of tree ferns from the cretaceous formation 
all belonging to the same order. 
If we now turn to our Indian specimen and compare it with the published figures, we 
shall find that it mostly agrees with Unger’s species from Ischl, although the horizons are 
somewhat different. 
Both these forms agree so much with the living Cyathea, that I do not see the necessity 
for classing them with Caulopteris, and I would propose for them the name Protocyathea 
Genus Pkotocyathea, Nov. 
Filix arborescens, cattle tereti; cicatricibus ramorum {foliorum) spiraliter dispositis, 
nunc maximis nunc mediocribus, structara earum cicatricibus Cyathearum viventium 
proximo. 
This genus would comprise two species, that one described by Unger as Caulopteris 
cyatheoides and our Indian form. 
1. Protocyathea Ungeri, sp. nov. 
1867. Caulopteris eyatheoides, Unger., 1. c. 
1869. Schimper, Pal. v<§g6t., I, p. 708. 
Locality: Neocomian near Ischl in Austria. 
2. Protocyathea Trichinopoliensis, sp. nov., PI. I, f. 1-2. 
Cattle arborescente, vivo tereti, statu fossili compresso, 10 Cm. in diametro metiente, 
extus cicatricibus ramorum (foliorum) notato; cicatricibus confertis, spiraliter dispositis, 
oblonge rltomheis, parte inferiore acuminatis, parte superiors obtusmsculis,fossula sepa¬ 
rates ; disco convexo prominente, subrhomboidali, vasorum stigmatibus circimdato, intus 
nonnullis vasculis sparsis notato ; inferiore parte cicatricis stigmatibus majoribtus expleta. 
Cortice partim tantrum, preservato. 
The stem is a little compressed and preserved in fine-grained, pretty hard sandstone. 
It cannot have heen very thick, the diameter of the compressed specimen being 10 Cm. 
The chief character is the scars; they are disposed in spiral order on the outside of the stem, 
the spirals being pretty vertical. The form of the soars is oblongly rhomboidal, in the lower 
portion more elongated and acuminated, in the upper portion obtuse; and hero pretty con¬ 
vex and prominent (the disk); the scars are pretty closely set and separated by furrows. The 
diseal portion is limited by roundish vascular marks from the other portion of the scar, and 
the inner surface of the disk contains some other vascular marks. The lower portion of 
the scars, which is elongated, contains also several larger and more oblong grooves. 
