have been highly compound and to have had fleshy lobed 
pinnules, probably of the Sphenopteris type. 
The original specimen described by Renault, which 
he described as “le fragment, qui contenait seulement 
une portion de ces fructifications”, had the following di¬ 
mensions : 
length (height) 4 to 5 cm. 
diameter (width) 3 to 4 cm. 
diameter (thickness) 2 to 3 cm. 
This last measurement was taken at right angles to 
the width (“largeur”). 
The pyriform sporangia had a maximum diameter of 
0.7 to 1.0 mm., and a length of 1.5 to 2.0 mm. The spo¬ 
rangia were attached in groups of five or six, sometimes 
more, and their total aggregation must have amounted 
to thousands. 
The Iowa material is, on the whole, very similar to 
Botryopteris forensis but in many details differs so that 
it is here regarded to be specifically distinct. 
Material at hand 
Specimens in the Collections of the Botanical Mu¬ 
seum of Harvard University: 
Shuler Mine, Dallas County, Iowa: 
42159 Cotype, nearly complete 
42635 Cotype, nearly complete 
42160 large mass, showing extensive surface 
42161 branched axis, impression view, not sawn 
42162 large mass of sporangia 
42163 large mass of sporangia 
42618 small portion of a fructification 
Urbandale Mine, Dallas County, Iowa: 
42679 fairly large mass of sporangia 
[158] 
