APPENDIX. 139 



Omphalophloios anglicus, Sternb. sp. (Fig. 26.) 



1826. Lepidodendron anglicum, Sternb. Vers. I., fasc. iv., p. 

 xi., PI. XXIX., fig. 3. 



1828. Stigmaria reticulata, Brongt. Prodrome, p. 87. 



1838. Aspidiaria anglica, Presl in Sternb. Vers. II., p. 181 

 (?P1. LXVIIL, fig. 11). 



1880. Lepidodendron cyclostigma, Lesqx. Coal Flora, Vol. II., 

 p. 394, PI. LXII, fig. 5. 



1888. Stigviaria anglica, Kidston. Trans. Roy. Soc. Edin., Vol. 

 XXX., Part II., p. 401, PI. XXVIII., figs. 9, 9ff, 10, 

 10a, 106. 



1897. Omphalophloios cyclostigma. White. Bull. Geol. Soc. Amer., 

 Vol. IX., p. 340, Pis. XX.-XXIII. 



Description. — Cortex divided into smooth rhomboidal areas, 

 whose lateral angles are somewhat rounded. Within this rhom- 

 boidal area or " field," and slightly above the centre, is an 

 elevated subcordate or subcircular cushion, with slightly raised 

 margin, containing, generally towards its upper half, an oval 

 scar with an oblong vascular cicatrice placed near its lower 

 margin. Immediately below this cushion, and attached to the 

 side of the elevated rim, is a small triangular ridge with a pit- 

 like cicatricule. In the older condition the scar is efiaced, and 

 the central area of the cushion becomes depressed, and is .sur- 

 rounded by an elevated ring, which frequently shows the small 

 pit-like cicatricule on its lower margin. 



British sjjecimens — 



Ilor. Radstock Series of the Upper Coal Measures. 

 Locs. Paulton ; Radstock ; and Camerton ; Somerset. 



American specimens — 



Hor. Lower Coal Measures, or Des Moines Series. 

 Locs. Clinton Coal, Missouri (Lesquereux). 



Pitcher's Coal Mine, Henry County (White). 



[The figures contained in brackets show the Registration number 

 of the specimens referred to in the Author^s Collection.'] 



