98 NORTH AMERICAN INDEX FOSSILS. 



119. E. missouriensis (Swallow). (Fig. 1320, c, d.) Carbonic. 



Strongly rounded, with the nodes faint or obsolete and septa 

 distant. 



Coal Measures of Indiana, Arkansas and Missouri. 



XLIL Metacoceras Hyatt. 



Like Temnocheilus, but with ventrolateral row of nodes faint or 

 obsolete, the whorls quadrangular, generally higher than wide, and 

 the sides flattened or concave ; siphuncle centren or near venter ; 

 sutures with broad ventral, lateral and dorsal lobes, but no annular 

 lobes. Carbonic. 



120. M. subquadrangulare Whitfield. (Fig. 12,21, h.) Carbonic. 



Fig. 132 1, a, Endolobus ortoni, X /^ > ^> Metacoceras subquadrangulare, X %> 

 (After Whitfield.) 



Large, subquadrangular in section; nodes passing into angula- 

 tion in final whorl. 



Coal Measures of Ohio. 



121. M. walcotti Hyatt. (Fig. 1322.) Carbonic. 

 Whorls higher than wide, the venter flat with deep hyponomic 



sinus. Ventrolateral angles rounded, without nodes ; sides with 

 median concavity. 



Coal Measures of Texas. 



122. M. sangamonense M. and W. Carbonic. 

 Whorls subquadrate, slightly wider dorsally than high; sides 



I 



