22 The American Geologist. January, vjos. 
ON RHOMBOPORA LEPIDODEN OROIDES MEEK. 
By G. li. CONDRA, Ph. I)., Lincoln, Neb. 
PLATE n. FIGS. 1-10. 
- 1866. Stenopora columnaris. Geinitz (not of Schlotheim, 1813, 
(in part) Carb. unci Dyas in Nebraska, p. 66. 
' 1872. Rhombopora lepiclodendroides Meek, Pal. Eastern Nebr., p. 141, 
PI. VII, 2a-f. 
1877. Rhombopora lepidodendroides (?). White, Wheeler's U. S. 
G. S., IV, Pal., p. 99, PI. VI, S'vcl. 
^ 1884. Rhombopora lepidodendroides. Ulrich, Jour. Cincinnati Soc. 
Nat. Hist., VII, p. 27, PI. I, i-ib. 
1887. Rhombopora lepidodendroides. Foerste, Bull. Sci. Lab., Den- 
ison Univ., II, p. 73, PI. VII, 3a, b. 
^ 1888. Rhombopora lepidodendroides. Keyes, Proc. Acad. Nat. Sci., 
Philadelphia, p. 225. 
1894. Rhombopora lepidodendroides. K,eyes, Missouri Geol. Surv., 
V, p. 35, PI. XXXIII, 4a, b. 
^ 1896. Rhombopora lepidodendroides. Smith, Proc. Amer. Phil. Soc, 
XXXV, p. 237. 
-1899. Rhombopora lepidodendroides (?) Meek. Knight, Jour. Geol, 
VII, p. 366. 
^^1900. Rhombopora lepidodendroides Meek. Nickles & Bassler, Bull. 
173, U. S. G. S., p. 395. 
^ 1901 . Rhombopora lepidodendroides. Rogers, Kans. Univ. Quar., IX, 
No. 4, pp. 240, 241, 245. 
Among a very large number of Coal Measure fossils found 
in Nebraska, some of which have been of service in determin- 
ing stratigraphy, the following seem to be the most common 
and widely distributed : Fusulina secalica, Seminula argentea, 
Chonetes granulifer, Spirifer cameratus, and Rhombopora 
lepidodendroides. The last named species has a wide range 
both vertical and horizontal ; it is more or less plentifully found 
in nearly all Coal Measure exposures of the state, and in the 
Permian at Blue Springs and Wymore. 
The first specimens were collected from outcrops along the 
Missouri river by professor Marcou. They were identified by 
professor Geinitz of Dresden, in 1866 as Stenopora colum- 
naris (Schlotheim 1813, in part). According to Meek, who 
named the species in 1872, the specimens observed by Geinitz 
were R. lepidodendroides Meek encrusted Ijy Fistulipora nodu- 
lifera Meek. The writer has found several specimens which 
Wiere quite concealed by Fistulipora nodulifcra Meek. It is very 
