4-12 PALEONTOLOGY OF ILLINOIS. 



Pecopteris velutma, Lsqx. Qeol. Report Penn., p. 866, tab. 

 12, fig. 3 and 3 a. A rare species. The locality of the speci- 

 men in the State Cabinet is unknown. 



Pecopteris villosa, Brgt- Hist, des Veg. Foss., 1, p. 316, tab. 

 104, fig. 3. Abounds in the roof shales of coal No. 3, at St. 

 John, Crooked creek, Carlinville, etc. 



Pecopteris oreopteredis, Brgt. Hist, des Veg. Foss., 1, p. 317, 

 tab. 104, fig. 2; tab. 105, fig. 1 to 3. Found at Murphysboro 

 and at Mazon creek, Grundy county. 



Pecopteris arhorescens, Brgt. Hist, des Veg. Foss., 1, p. 310, 

 tab. 101. Locality: Mazon creek, Grundy county. Rare in 

 Illinois. 



Pecopteris lepidorrhachis, Brgt. Hist, des Veg. Foss., 1, p. 

 313, tab. 103, fig. 1 to 5. Our species is exactly conformable 

 with the description and figures of M. Brongniart. The rachis 

 is squamose, the leaflets sometimes a little broader. It is evi- 

 dently distinct from the former species. Locality: Mazon 

 creek, Grundy county. Coal No. 3. 



Pecopteris unita, Brgt. Hist, des Veg. Foss., 1, p. 342, tab. 

 116, fig. 1 to 5. Abundant at Duquoin, Colchester, Mazon 

 creek, etc. 



Pecopteris plumosa, Brgt. Hist, des Veg. Foss., 1, p. 348, tab. 

 121 and 122, and Pecopteris acuta, Brgt., Loc. Cit., 1, p. 350, 

 tab. 119. Same distribution as the former species. 



Pecopteris nervosa, Brgt. Hist, des Veg. Foss., 1, p. 297, tab. 

 94. The State Cabinet has only a small specimen from Mur- 

 physboro, Jackson county. Lower Coal Measures. 



Pecopteris callosa, Sp. nov. PL 35, fig. 1 to 5. Frond bi or 

 tripinnatifid. Pinnse linear-lanceolate, obtuse, with a broad 

 unequally lobed, deltoid-terminal leaflet; pinnules oblong or 

 ovate-lanceolate, or broadly oval, narrowed at the base, and 

 somewhat decurrent on the winged rachis, distinct, sometimes 



