PLATE XXVIII. 
Page. 
Jig. 1 . Catjlopteris obtecta, Spec, nov , one-fourth natural size . . .. . 45^ 
Pig. 2. Same specimen, on the reverse. 
Pig. 3. Branch cicatrice of the same, natural size. 
Fig 4. Part of the surface, showing rootlets in relative p sition, either naked, or with 
a carbonaceous pellicle. 
