PLATE 120. 



Strombodes knotti, Nov. Spec. Devonian. 



1. View of the upper surface of a fragment, from the Lower Devo- 



nian clay of Marion county. Collection of Mr. Knott. 



2. View of the upper surface of a fragment, showing somewhat larger 



central pits. 



3. View of the upper surface of a fragment. 



4. View of the under surface of a fragment. 



5. View of the under surface of a fragment, with a part of the epitheca 



fortuitously stripped so as to show the terete apical part of a 

 corallet. 

 Specimens 2, 3, 4, 5, are from the horizon and vicinage of example 

 1. Collection of the author. 



6. View of the upper surface of a moderately well preserved example, 



with extra-sized central pits and calyx walls better defined than is 

 common. 



From the horizon and neighborhood of the other specimens. Col- 

 lection of Mr. Linney. 



