70 NEW YORK STATE MUSEUM 



in the opposite line of variation to an acuminate spire is P. (E o t o m a r i a) 

 1 a p h a m i Whitfield ' from the Niagaran at Ashford Wis. 



Eotomaria kayseri sp. nov. 



Plate 7, fig. x ; plate 8, fig. i 



The presence of still another species of the genus in the Guelph of 

 Rochester is indicated by two internal casts, one of them pretty well pre- 

 served. These are of relatively large size, with stout whorls, apical angles 

 about 75°, spire elevated, three whorls preserved. The suture is deeply 

 impressed, the whorls overlapping not quite to the periphery. Surface of 

 the whorls full, expanded, prominent on the slit band, which is narrow 

 and elevated and bounded above by a similar ridge in close juxtaposition. 

 On the outer whorl the surface slopes rather directly from suture to periph- 

 ery or may be slightly concave between the peripheral ridge mentioned 

 and another low ridge just outside of the suture. The lower or basal 

 surface is evenly and moderately convex, not ventricose. The exposed 

 parts of the earlier whorls are quite regularly convex, though showing 

 evidence of the revolving ridges. The shell appears from the cast to have 

 been distinctly umbilicate, though the umbilicus is quite narrow. 



The hight of the best preserved shell (allowing for the apical whorls) 

 is 53 mm ; width across the base 48 mm. 



Eotomaria galtensis Billings (sp.) 



Plate 10, fig. 10-12 



Pleurotomaria galtensis Billings, Paleozoic Fossils. 1862. 1:154, fig. 136 

 Pleurotomaria galtensis Whiteaves, Paleozoic Fossils. 1895. v. 3, pt 2, 

 p. 75. pl- ", fig- 7 



Specimens referable to this species, were collected in the upper and 

 lower Guelph of Oak Orchard creek. 



Both show the characteristics of the internal and external casts on which 

 Billings based the description of his species, viz depressed conic profile 

 corresponding to an apical angle of about ioo°, nearly flat upper side of 



'Geol. Wisconsin. 1879. 3:296- 



