150 NEW YORK STATE MUSEUM 



D. a f f i n e ; large shells with high spire and large penultimate whorl. 



Grande Greve, New York (?). 



D. d e s m a t u m ; small, with sharply cancellate surface. Glenerie, 



Becraft mountain, Grande Greve. 



D. perceense; large, robust and ventricose shells with spire depressed 



or overlapped so that the outer whorl is often higher 

 than the penultimate. Surface with fine compressed 

 concentric lines which are not more distinctly marked 

 on early whorls. Perce. 



Strophpstylus expansus Hall var. 



Plate 15, figures 15-16 



6'^^ S t r oph o s t y 1 u s expansus (Hall) Clarke. N. Y. State Mus. Mem. 3. 1900. 

 p. 30, pi. 3, fig. 24 



The shell identified by the writer from the Becraft mountain Oriskany 

 as Str. expansus Hall is essentially reproduced in the Grande Greve 

 limestone. These shells which are of persistently smaller size than typical 

 S. expansus of the Glenerie Oriskany as well as the arenaceous beds of 

 central New York, seem to indicate that the distinction which is apparently 

 persistent is worthy of noting in the absence of the larger expressions in 

 association therewith. 



Locality. King's road, Grande Grfeve. 



Eotomaria voltumna Billings (sp.) 



Plate 16, figures i, 2 



Pleuro torn aria voltumna Billings. Palaeozoic Fossils. 1874. v. 2, pt r, 

 p. 61, pi. 5, fig. 5, sa 



Oi'tginal description. Shell sub-turbinate or sub-globose ; apical angle between 

 90° and 100° ; spire consisting of about three rounded or obscurely lenticular whorls 

 with a three-grooved band about the mid-hight; aperture obscurely subrhomboidal, with, 

 apparently, a tendency to become effuse at the lower angle; umbilicus very small. Surface 

 with rather coarse transverse striae, about three in the width of one line, curving back- 

 wards from the suture to the band. Width, fifteen lines; hight, thirteen lines; width 

 of the band near the aperture, about two lines. 



Of this species only one imperfect specimen has been collected. The surface of the 

 whorl, above the band, slopes upwards to the suture, with a gently convex curve, slightly 

 more flattened just above the band than near the suture. The same form prevails below 

 the band where the curve of the surface, at first moderate, becomes abruptly convex 

 around the umbilicus. 



The band, in this specimen, consists of three concave grooves, the lower one, as seen 

 on the body whorl, being the largest, and the upper the smallest, the three near the aper- 

 ture occupying a width of about two lines. 



Locality and formation. Grande Greve, Gaspe; limestone no. 8. 



We have seen no example of this species, except the original, which is 

 here reproduced. 



