PLATE LXXIII 



PAGE 



Figs. 1-3. GLYPTASPIS EASTMANI n. sp 700 



1. Antero-ventro-lateral plate showing surface ornamentation. Jen- 



nings formation, base of Parkhead member, Horse Ridge, south- 

 west of Hancock, 1600. 



2. Right postero-ventro-lateral plate showing surface ornamentation. 



Jennings formation, Parkhead member (?), west of Green 

 Ridge, near Pennsylvania line. 



3. Fragment of an undetermined plate from the same locality as fig. 1. 



J53 



