FOSSIL PLANTS. 445 



Asterophyllites sublcevis, Lsqx. Geol. Rept. of Penna., p. 851, 

 tab. 1, fig. 3. A few small specimens from Mazon creek. 



Asterophyllties lanceolatus, Lsqx. Geol. Rept. of Penna., p. 

 852. Mazon creek, Grundy county. Coal No. 3. 



THIRD DIVISION.— STEMS OF UNCERTAIN OR UNKNOWN AFFINITIES. 



Genus Calamites, Suck. Stems cylindrical, hollow, articu- 

 lated, striated lengthwise ; furrows or striae either alternating 

 or converging at the articulations ; leaves whorled, encircling 

 the stem at the articulations like an open sheath; ramification 

 regular or irregular from the articulations ; elevated scars or 

 tubercles marked above or below the point of attachment of 

 the leaves. 



Calamites Suckowii, Brgt. Hist, des Veg. Foss., 1, p. 124, tab. 

 15, fig. 1-6. Variable, and found at various situations. Carmi, 

 Wabash river. Locality: Upper Coal Measures. 



Calamites ramosus, Brgt. Hist, des Veg. Foss., 1, p. 127, tab. 

 17, fig. 5 and 6. Locality: Duquoin and Murphysboro. 



Calamites cruciatus, Sternb. Vers., 1—4, p. 27, tab. 49, fig. 5. 

 Found at Duquoin. 



Calamites cistii, Brgt. Hist, des Veg. Foss., 1, p. 129, tab. 20. 

 Some specimens of the State Cabinet are from Grayville; some 

 have no marked locality. 



Calamites pachyderma, Brgt. Hist, des Veg. Foss., 1, p. 132, 

 tab. 22. There is in the State Cabinet a single specimen, 

 without marked locality. This species is always found within 

 or below the Millstone-grit or Conglomerate formation. 



Calamites oistriatus, Lsqx. Geol. Rept. of Penna,, p. 850, tab. 

 2, fig. 1. A specimen in the State Cabinet. Locality unknown. 



Calamites approximates, Brgt. Hist, des Veg Foss., 1, p. 134, 

 tab. 24, fig. 7 and 8. Not rare in Illinois. Carmi, Springfield, 

 Duquoin, etc. Upper Coal Measures. 



