142 NEW YORK STATE MUSEUM 



the greatest convexity being found in the posterior third, while in the typical 

 B. cylindrica the valve culminates in the middle. 



The valve possesses an internal vertical thickening of the median part, 

 which produces a broad shallow impression upon the cast of the interior 

 surface. 



The surface is so finely pitted that this sculpture is visible only with 

 great enlargement. 



Locality, Shore outcrops at Grande Greve. 



CEPHALOPODA 

 Kionoceras rhysum nov. 



Plate 13, figures 1-5 



Straight longicones with regular narrow, erect annulations which may 

 be slightly oblique and are separated by broad, smooth, concave or flat inter- 

 spaces. On the best preserved external casts there is no trace of either 

 longitudinal or concentric lines but the summits of the annuli are dotted or 

 punctured. 



This form is represented by specimens for the most part small, in which 

 there are on the average 6 annuli in a length of 20 mm, but other examples 

 indicate that the species attained large proportions. 



Locality. At various outcrops in the upper beds on the Gaspe Forillon. 



Kionoceras champlaini nov. 



Plate 13, figure 8 



This species is represented by longicones having a series of low and 

 broad undulations of the surface continuing quite to the aperture and these 

 are crossed longitudinally by elevated, distant, simple lines with broad flat 

 interspaces, each about twenty-five in number, the former becoming obsolete 

 at the aperture. 



This species is of rare occurrence and its characters distinctive. The 

 best preserved specimen has a width of 22 mm at the aperture and a length 

 (incomplete) of 50 mm. 



Locality. Indian Cove. 



Orthoceras sp. 



Smooth, straight cones with regularly concave septa. 

 Locality. Grande Greve. 



"Cyrtoceras" sp. 



Curved camerate longicones are found occasionally in the limestone 

 but they are not more exactly determinable. 

 Locality. Grande Greve. 



