MOLLUSCA—CONULARIDA—CONULARIDM, 1 3 



32. C. huntiana Hall. (Fig. 1224.) Devonic. 

 Shell tapering very gradually, with deeply furrowed angles and 



crossed by transverse ridges. 

 Helderbergian of New York. 



33. C. undulata Conrad. (Figs. 1225-26.) Devonic. 



f^r''^ 





Fig. 1224. Conularia huntiana, with enlargement of surface. (After Hall.) 



Transverse section quadrangular. Each face crossed by fine 

 striae which are slightly deflected at the median groove and at the 

 angles of the shell, and which are finely crenulated. 



Hamilton of New York. 



34. C. newberryi Winchell. (Fig. 1227, a, &.) Mississippic. 

 More slender, less rapidly tapering than preceding; median 



groove on each face faint, scarcely interrupting the transverse 

 lobes, which are coarse, distant, arched and minutely noded. 

 Waverly of Ohio. 



35. C. micronema Meek. (Fig. 1227, c-f.) Mississippic. 

 Differs from preceding in more strongly pronounced median 



groove and finer surface striae, which are finely crenate (^), and 

 may become double (/). 

 Waverly of Ohio. 



