444 PALEONTOLOGY OF ILLINOIS. 



pothctical induction. Locality : Murphysboro, St. John's, etc 

 Lower Coal Measures. 



Genus Spiienophyllum, Brgt. Stems articulate, branching 

 from the articulations; leaves verticillate by six to twelve, 

 wedge-shaped, truncate at the top, either bilobate, or dentate, 

 or furcate; nerves ascending from the base, equal, forking. 



Spiienophyllum Schlotheimii, Brgt. Prod., p. 68, is not rare 

 at Colchester and Duquoin. Obal No. 3. 



Spiienophyllum emarginatum, Brgt. Prod., p. 61. Generally 

 found with the last. 



Genus Annulapja, Sternb. Stems slender, articulate, branch- 

 ing from under the base of the leaves; leaves verticillate 

 around the articulations, united at the base, entire, generally 

 obtuse, oblanceolate, single nerved, of unequal length. 



Annularia longifolia, Brgt. Prod., p. 156. Especially found 

 in connection with coal No. 3 and 4. Mazon creek, Grundy 

 county, Illinois. 



Annularia Sp7ienophylloides, Ung. Is found with the former, 

 also at Murphysboro, Jackson county. 



Genus Asterophyllites. Stems articulate, with opposite 

 branches, and leaves at the articulations; leaves numerous, 

 verticillate, slightly united at the base, of equal length and 

 size, linear acute, marked with a medial nerve. Inflorescence 

 from ear-like receptacles at the end of the branches or sessile 

 on the stems, apparently dioecious. 



Asterophyllites longifolius? Brgt. Prod., p. 159. Leaves sub- 

 ulate, about three inches long, straight. The specimen in the 

 State Cabinet is from Mazon creek, Grundy county, and indis- 

 tinct. It may belong to Asterophyllites rigida, Brgt. Coal 

 No. 3. 



Asterophyllites equisetiformis, Brgt. Prod., p. 159. Locality: 

 Duquoin, Perry county. Coal No. 3. 



