228 _ OC, Lyell and C. T. F. Bunbury on the 
slab, five and a half inches in vertical diameter, and fourand two- 
tenths in transverse diameter, but, also, as affording additional ev-— 
idence of the existence of this group of radiated. animals at wi: 
remote periods, 
All the specimens,* hitherto found, were obtained near lon 
water at St. Louis, from a limestone formation, considered the 
equivalent of the mountain limestone of Europe, associated with 
the Producta figured in vol. xliii, No. 1, p. 81, Ist Ser., of this Jour 
nal, an Aulopora,? Gorgonia, Retepora, Ceriopora, ? and a small 
Delihyris.t It is situated, by estimate, from fifty to seventy-five 
feet below the lowest seam of coal at ance known in sodas 
Illinois coal. field. Ser att 
Madison, Ia., June 20, 1846. 
Arr. XXIV. - Obsétvations on. the “Fossil Plants, “et the Coal 
Field of Tuscaloosa, Alabama ; by C. Lyeun, Esg., with a 
- description of some. sangria by C. 7. BF. Borsunr; Esq., F. G.S. 
oie a former number of the ‘American J ournal,{ I described the 
ographical position of the coal fields of Alabama, and stated 
ca the carboniferous strata of the Warrior river extend south-_ 
wards to the town of Tuscaloosa in the neighborhood of which, 
aided by Professor Brumby, (who had already made some pro- 
gress in the investigation, ) I succeeded in collecting. impressions 
of Sigillaria, Stigmaria, | Lepidodendron, Calamites, Neuropt eris 
and several other ferns. I also stated that I recognized a specific 
identity between several of these fossils, and some of the most 
abundant coal plants of Pennsylvania and Europe. On my return 
to England in June, 1846, I submitted the specimens to my friend 
eh, 2. Banbury, who immediately compared them with the 
best published plates and descriptions, and with European fossils 
in the cabinets of the Geological Society of London. The re- 
sult of his examination has fully confirmed the conclusion to | 
* The first specimens of this fossil were found by H. A. Prout, M.D., of St- 
Louis, sometime previous to our discovery. Most of the specimens yet obtained, 
» compressed ; but Dr. P. has one in his cabinet which is detached, and in the 
original spheroidal form 
1 For or want of the necessary works of reference, we are unable, at present, to de- 
oot whether. these genera, heling undescribed species. 
ad Series, i, 371. ind came) 
