192 Annals of the Carnegie Museum. 



mon in outcrops of the Chazy along Lake Champlain south of Crown 

 Point. That it was a high narrow shell consisting of more than seven 

 short, rounded volutions, is all that is now known of this species. 

 Attention is here directed to it merely to note the occurrence of large 

 shells of this genus in the Chazy formation. 



The figured specimen shows a section near the outer edge, some 

 distance from the axis. This specimen is in the Carnegie Museum 

 and was obtained at Maclurea Point, about ten miles north of Fort 

 Ticonderoga, New York. 



Genus Eotomaria Ulrich and Scofield. 

 Eotomaria obsoleta Raymond. 



(Plate XLIX, figures 12-14.) 

 Eotomaria obsoletam Raymond, 1905, American Journal of Science, 

 Series 4, Vol. XX, p. 376. 



Description. 



Shell small, trochiform, with about four volutions. The spire is 

 conical, the sides of the volutions flat, and the suture only slightly 

 impressed. The lower part of the body whorl is convex, the umbili- 

 cus small. The holotype is an internal cast and shows no suiface mark- 

 ings. Aperture large, angulated on the side, rounded below. 



Another specimen, which probably belongs to the same species, 

 shows a narrow concave band just above the suture on the penultimate 

 whorl and above the periphery of the body whorl. The surface mark- 

 ings of this specimen consist of delicate striae which cross the upper 

 surface of the whorls in a nearly vertical direction, and turn backward 

 very abruptly close to the slit band. 



This species closely resembles Clathrospira subconica Hall, a species 

 which ranges from the Stones River to the Loraine and is found from 

 Canada and New York to Tennessee and Minnesota. The cast of 

 Eotomaria obsoleta, however, shows a much less deeply impressed 

 suture, the vertical striae are much coarser and the revolving lines are 

 not present, so that the shell surface is not cancellated. Moreover, 

 the slit band is not vertical, but oblique. 



One specimen is 13 mm. high and 14 mm. in diameter at the 

 periphery of the body whorl. 



Locality. — The holotype is from the Chazy formation at Crown 



