376 P. E. Raymond — Fauna of the Chazy Limestone. 



Locality. — Rare at Chazy, New York, in the Lower Chazy 

 ;rs south of the lime kilns. It occurs also at Lenoirs, 

 Tennessee. 



Scenella robusta sp. nov. 



Shell large, aperture nearly circular. Beak obtuse, rather 

 high, and located a little behind the middle. All slopes about 

 equal and all convex, the whole shell somewhat hemispheric. 

 The specimens are all casts, showing no surface markings of 

 any sort. 



The only perfect example is I7 mm in greater diameter and 

 16 mm in lesser. A much larger one is represented by a frag- 

 ment 27 mm long, but it had evidently been considerably larger. 



Locality. — Yalcour Island, in the Middle Chazy beds. Rare. 

 The type is in the writer's collection. 



Palceacmwa irregularis sp. nov. 



Shell rather large, irregular in outline, generally subcircular, 

 but never with a smooth curve. Beak obtuse, almost central, 

 sometimes a little back of the center. All slopes about equal, 

 generally almost straight, but occasionally a little convex. 

 Surface marked by numerous line concentric lines of growth, 

 which follow the irregular form of the aperture. Usually 

 there are a few radial folds and some irregular depressions 

 and pits which do not follow in symmetrical arrangement. 



The greater diameter of the aperture is 26 mm ; the lesser is 

 10 mm . The aperture of another is 19 mm long, 18 mm wide, and 

 the apex is 9 mm above the aperture. 



Locality. — Common in lower layers at Chazy, New York. 



Helicotoma vagrans sp. nov. 



Shell small, somewhat Maclurea-like, the spire flat and 

 depressed below the plane of the highest points on the upper 

 surface. Outer edge of the body whorl angular, raised as a 

 high sharp ridge toward the aperture. Lower surface of the 

 shell rounded, the umbilicus wide. Aperture large, quadri- 

 lateral, angular above, rounded below. Surface marked by 

 fine lines of growth, which turn back on crossing the angle of 

 the upper surface. 



Locality. — A rare fossil at Yalcour Island, New York. The 

 type is in the writer's collection. 



JEotomaria obsoletmn sp. nov. 



Shell small, trochiform, with about four volutions. The 

 Tipper part is conical, the volutions are flat, and the sutures only 





