OF DENISOX UNIVERSITY. 4 1 



with numerous (20-28) rounded plicre, broad fold with six or seven 

 plicae, and the sudden flexcure of the front and lateral margins. The 

 species ranges through the middle Waverly. 



Several other species could be recognized, but it is feared that a 

 larger collection would obliterate the distinctions assumed. 



Aiviipa reticular^, ? ? 

 (Plate III, Fig. II.) 



Small specimens resembling this species have been obtained from 

 the upper free-stone, lower part of division III. The identification is 

 doubtful, though undoubted specimens said 10 have been derived from 

 the Waverly are in the museum of Ohio State Unixersity. 



Genus Svringothyris, Winchell. 



{Syvingothyris cuspidafus, Martin 



(Plate I, Fig. 7, (?) ; Plate II, Fig. 17 ; Plate V; Figs. 4-7.) 



Anoviites citspidatus, Martin',- 1796. 

 Spirifer cuspidatus, Sowkrhv, 1S09. 



Davidson, 1857. 

 Cyrtia simplex, McCov, 1884. 

 Cyrtia ciispidata, M c (^ ) v, 1855. 

 Sp infer capa.w Hall, 1858. 

 Spirifer ear/eri. Hall, 1857. 

 Syringothyris typa, Winchell, 18O3 

 Spirifer textus. Hall, 1857. 

 Spirifer hannibaletisis, Swallow. (?) 



It seems to me after a careful collation of the descripiions above 

 quoted and the comparison of several hundred specimens that a due 

 conservatism will unite all the supposed species and identify them, as 

 positively done by Davidson and Dekoninck, the most careful Kuro 



