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Systematic Paleontology 



broad at the base, disappearing before reaching the apex. Lateral veins 

 branching at a variable acute angle, anastomosing to form irregular 

 meshes which are subrhombic in some specimens and very much elongated 



Fig. 4.— Restoration of Sagenopteris elliptica about natural size. 



with few anastomoses in others. Fontaine describes minute elevations 

 between the veins on the lower surface which he thinks indicate polypo- 

 diaceous fructifications. These are said to be distinctly seen only with 

 the aid of a lens, and yet they are 0.5 mm. long in the specimen figured 



