92 
GENERA AND SPECIES IN THE UPPER CAMBRIAN OF KNOWSLEY EAST, 
HEATHCOTE. 
PLANTiE— 
Sphenothallus filicoides, sp. nov. 
AXIMALIA—• 
Brachiopoda. 
Obolus obovata, Chapin, sp. 
Lingulella australis, sp. nov. 
Leptobolus truncata, sp. nov. 
Acrothele subquadrata, sp. nov. 
Acrothele brevis, sp. nov. # 
Billingsella tenera, C'hapm. sp. 
Billingsella fergusoni, sp. nov. 
Eoorthis flexilis, sp. nov. 
Hebertella raristriata, Chapm. 
Eostrophomena skeatsi, sp. nov. 
Huenella divaricata, Chapm. sp. 
Clitambonites flabelloides, Chapm. sp 
Pelecypoda— 
Grammysia heathcotiensis, sp. nov. 
Trilobita— 
Agnostus australiensis, Chapm. 
Dinesus ida, Eth. fil. 
Saratogia cf. hamulus, Owen sp. 
?Saratogia rugulata, sp. nov. 
cf. Saukia, sp. 
Xotasaphus fergusoni, Gregory. . 
Br ANCHIOPOD A—• 
Lepeditta knowsleyensis, Chapm. sp. 
DESCRIPTION OF SPECIMENS. 
PLANTS—Series THALLOPHYTA. 
Gextjs Sphenothallus, J. Hall. 
Sphenothallus filicoides sp. nov. Plate VI. fig. 1, 
Description. —Frond thin, with axis slightly differentiated from branches. 
Branches or leaflets elongated, sub-ovate to wedge-shaped, thickened in 
median area by a rounded midrib. Length of specimen about 12 mm. ; 
basal leaflets from 4 to 7 mm. in length. 
Relationships. —This form appears to be nearest to Sphenothallus angusti 
folius, J. Hall, 1 which was found near Schoharie, New Y r ork State, in the 
Hudson River Group (Bala Series). It is distinguished from Bythotrephis 
in having a more definite stipe to which are attached the sphenoidal or ovate 
leaflets. Another striking feature of the genus is the rounded midrib in 
each leaflet. The Heathcote species differs from the North American in the 
shorter and less definitely sphenoidal shape of the leaflets ; otherwise there is 
a striking resemblance between them, which is certainly generic. 
Sphenothallus hlicoides was collected by Professor E. W. Skeats. 
1 Pal., X. York, vol. I., 1848, p. 261, pi. LXVII., fig. 1. 
