BY THE REV. J. E. TENISON- WOODS, F.G.S., F.L.S. 139 



lowest bed of limestone, in rocks composed of red, white, and blue 

 limestone, with triboliths formed of pink quartz, rounded pebbles 

 grooving the hone stone ; and above the plant beds a remarkable 

 white grit conglomerate is found. The plant-beds, on the same 

 geological horizon, are also found in the railway cuttings at Bally- 

 hale. They are found, however, in the greatest abundance, and in 

 the best state of preservation, on the top of Kiltorkan Hill, near 

 the railway station of Ballyhale. I believe the plant-beds on the 

 summit of this to form an ' outlier,' and to occupy the same 

 geological position with respect to the limestone as the beds at 

 Jerpoint and those of the railway cutting. The fossil plants here 

 found have never been described except casually. They consist of 

 remains of a large Fern, called Cyclopteris hibernica, by Professor 

 Forbes, associated with a large bivalve, named by him Anodon 

 jukesii ; of undescribed dermal plates of a cartilaginous fish, pro- 

 bably a species of Coccosteus ; and of numerous unknown plants 

 closely allied to Lepidodendron, and so named by Professor Forbes 

 and M. Brongniart, the latter of whom has named a remarkable 

 species, preserved in the Museum of the Royal Dublin Society, 

 Lepidodendron griffithsii. Others of these fossil plants have been 

 named Knorria ; and a large undescribed group remains, to which 

 I propose to give the name of Cyclostigma." 



Mr. Carruthers, in his appendix on the fossil plants (see Dain- 

 tree on the Geology of Queensland, loc. cit.), says : — " Among the 

 Devonian fossils presented by the Rev. W. B. Clarke to the 

 Society's museum there is a fragment ot a lepidodendroid plant 

 which I cannot separate from that found at Kiltorkan, to which 

 Dr. Haughton gave the name of Sigillaria dichotoma, and after- 

 wards of Gyclostigma kiltorkense, and which, after receiving many 

 other aliases, should be named, I believe, Syringodendron dicho- 

 tomum, as being a species of that genus as amended by Brongniart 

 in his ' Histoire,' and again in his ' Tableau.' " 



In the Nat. His. Review, vol. 6 (1859), there are four plates 

 (pi. 38, 39, 40, 41), giving different details of the C yclostigma, 

 showing the whorled and spiral structure of the leaves, &c. 



