212 FOETT-THIRD REPORT ON THE StATE MuSEUM. 



3 Martinia (Laeves). Corniferous — Coal Measures. 



4 Ambocoelia. Hamilton — Upper Coal Measures. 

 21 SyriBgothyris. Onondaga — Warsaw. 



104 



Species studied and placed under their appropriate divisions .... 104 

 Species remaining to be studied 117 



Species classified and arranged under the following heads: 



Radiata. 



S. radiata, Hall. Clinton and Niagara groups.* 

 S. Eudora, Hall. Niagara. 

 S. Niagarensis, Conrad. Niagara. 

 S. Macropleura, Conrad. Lower Helderberg. 

 ? S. mesastrialis, Hall. Chemung. 

 S, ^ n. sj). Lower carboniferous limestone. 



FiMBRiATA (plicate). 



S. crispa, Hisinger. Niagara. 



S. crispa, var. simplex, Hall. Niagara. 



S. Saffordi, Hall. Lower Helderberg. 



S. concinna. Hall. Lower Helderberg. 



S. Vanuxemi, Hall. Lower Helderberg. 



S. cycloptera, Hall. Lower Helderberg. 



S. octocosta, Hall. Lower Helderberg. 



S. tribulis. Hall. Oriskany sandstone. 



S. arrecta, Hall. Oriskany. 



S. duodenaria. Hall. Corniferous limestone. 



FiMBRiATA (nonplicate). ^ 



S. bicostata. Hall. Niagara. ■• 

 S. modes ta. Hall. Lower Helderberg. 

 S. Isevis, Hall. Portage. 



S. pretinatura. Chemung. \ 



S. hirta, White & Whitfield. Choteau. : 



S. pseudolineata, Hall. Kinderhook — Keokuk. j 



S. setigera. Hall. St. Louis — Chester. \ 



S. clara, Swallow. Chester group. j 



S. lineata, Martin. Coal Measures — Upper Coal Measures. | 



