202 Annals of the Carnegie Museum. 



the umbilicus. In a specimen with four whorls the diameter is three 

 inches and seven lines ; the width of the last whorl at the aperture, on 

 the flat, lower side, is sixteen lines ; at the termination of the third 

 whorl six lines, and of the second whorl three lines. The first whorl 

 occupies about two lines of the diameter in the center. In the same 

 specimens, if on a line drawn from the aperture straight across the 

 shell, the width from the outside of the aperture to the center is two 

 inches and two lines, and from the center to the termination of the 

 line on the posterior side one inch and three lines .... 



"The operculum found associated with the specimens is elongated, 

 flat or a little concave on one side, moderately convex on the other, 

 curved like a short Cyrtoceras, but not in the same plane, — the apical 

 half being gradually turned towards the flat side, so as to constitute a 

 sub-spiral curve." 



Genus Eccyliomphalus Portlock. 



Eccyliomphalus fredericus Raymond. 



(Plate LIII, figures 1-3.) 



Eccyliomphalus fredericus Raymond, 1902, Bulletin of American 



Paleontology, p. 305, PI. 18, fig. 4. 



Description. 



' ' Very loosely coiled, making but one volution ; tapering rather 

 abruptly at the apex ; test thin, marked by distant lamellose lines of 

 growth ; cast rounded, smooth ; section nearly circular. 



" Diameter of largest specimen 3.5 centimeters; greatest diameter 

 of outer coil, 1 centimeter." 



Locality. — This species was described from Crown Point, where it 

 is not uncommon. It occurs also at Valcour and Valcour Island, 

 New York. 



The holotype is in the Cornell University Museum. The speci- 

 mens figured on Plate LIII are from Crown Point and were a part of 

 the series of individuals used in drawing up the original description. 

 They are therefore paratypes. These specimens are now in the 

 Carnegie Museum. 



Eccyliomphalus kalmi Raymond. 



(Plate LIII, figure 4.) 

 Eccyliopterus kalmi Raymond, 1906, Annals of the Carnegie Museum, 

 Vol. Ill, p. 576. 



