236 FOSSIL PLANTS. 



CYCLOSTIGMA, Haughton, 1860. 

 Annals and Mag. Nat. Hist., 3rd series, vol. v. p. 443. 



Cyclostigma Kiltorkense, Haughton. 



Cudostiqma Kiltorkense. 



Baily, Geol. Survey, Ireland, Expl. sheets 192-199, pp. 16, 19, and 20. 

 Haughfcon, Nat. Hist. Eeview, vol. vi. pi. xl. fig. 1, vol. vii. p. 222. 



Annals and Mag. Nat. Hist. 3rd ser. vol. v. p. 444. 

 Heer^ Foss. Flora d. Baren. Insel. p. 43, pi. xi. 

 Schimper, Traite d. Pale" out. Veget. vol. iii. p. 540. 

 Cyclostigma minuta. 



Baily, Geol. Survey, Ireland, Expl. sheets 187, 195, and 196, p. 21. 

 Haughton, Nat. Hist. Eeview, vol. vi. pi. xl. fig. 2, vol. vii. p. 222. 



Annals and Mag. Nat. Hist. 3rd ser. vol. v. p. 444. 

 Heer, Foss. Flora d. Baren Insel, p. 44, pi. vii. figs. 11, 12, pi. viii. fig. 56, 



pi. ix. fig. 5. 



Schimper, Traite" d. Pal6ont. Veget. vol. iii. p. 540. 

 Cyclostigma Griffithii. 



Haughton, Nat. Hist. Eeview, vol. vi. pi. xli., vol. vii. p. 222. 

 Annals and Mag. Nat. Hist. vol. v. 3rd ser. p. 445. 

 Cyclostigma, sp. 



Haughton, Nat. Hist. Eeview, vol. vi. pis. xxxviii. and xxxix. 

 Lepidodendron Griffithsii. 



Baily, Brit. Assoc. Eeport for 1859, p. 99. 



Quart. Jouni. Geol. Soc. vol. xxvii. p. 2, 1871. 

 Lepidodendron minutum. 



Baily, Quart. Journ. Geol. Soc. vol. xxvii. p. 2, 1871. 

 Sagenaria Veltheimiana. 



Baily, Geol. Survey, Ireland, Expl. sheets 192-199, pp. 16, 19, and 20, 



fig. la, and Expl. sheets 187, 195, and 196, pp. 14, 21, and 22, fig. 3. 

 Knorria Bailyana. 



Schimper, Traite d. Paleont. V6"ge"t. vol. ii. p. 48. 



Remarks. The leaf-scars are oval or almost circular, and in well-preserved 

 specimens they show slightly above their centre, three little vascular 

 impressions. The bark between the leaf-scars is ornamented with delicate 

 longitudinal lines. The older stems become irregularly furrowed, and when 

 badly preserved might be mistaken for Calamites. The collection contains a 

 specimen so furrowed, but which still shows very beautifully the characteristic 

 Cyclostigma leaf -scar. On older stems the scars became more distant. The 

 leaves are long, linear, single-nerved, and end in a setaceous point. After 

 examining well-preserved specimens of Cyclostigma and Rhytidodendron, 

 Boulay, I fail to discover any real character by which the two genera can 

 be kept separate. 



There are in the Collection three small specimens from Lower Albany, 

 South Africa, which are closely related to Cyclostigma Kiltorkense. The exact 

 horizon of these examples is not known. 



Horizon. Devonian. 



Locality. British. Ireland : Kiltorkan, county Kilkenny. 



STIGMARIA, Bronguiart, 1822. 

 Sur la Classification des Vegetaux Fossiles, p. 9. 



Stigmaria ficoides, Brongniart. 

 Remarks. For notes and references, see ante, p. 201. 

 Horizon. Devonian. 

 Locality. Foreign. Vosges : Niederburbach. 



