Anatifopsis wardelli nov. 



Page 102 



i, 2 Partially exfoliated valves showing the basal ridges. Figure 

 I, x 2; figure 2, x 3. 



3 Valve retaining the surface sculpture, and the apex, probably 



plate of capitulum. x 2. 



4 Valve with two apexes, x 3. 



5 Fragment of valve showing cast of inner surface. 



6 Large specimen, partly exfoliated and showing the basal ridges 



and apex, x 2. 



7 Fragment of organism, consisting of series of four valves, x 4. 



8 Fragment of valve with straight margin, x 2. 



9 Rhomboidal plate, possibly belonging to pedicle, x 4. 



10 Section of valve (capitulum plate), x 2. 



11 Enlargement (x 15) of interior sculpture of plates, appearing 



when part of the valve substance has been weathered out. 



12 Enlargement (x 10) of network of chitinous fibers on inside of 



valves. 

 Silurian : Longwood shales, Shawangunk mountains, Otis- 

 ville, N. Y. 

 The originals (syntypes) are in the New York State Museum. 



