﻿43 Distribution of Species 17 



Yanuxem describes this species as " a small spiral undescribed 

 univalve." The whorls or coils are more numerous and slender 

 than those in the woodcut and the central ones are raised, not 

 being in the same plane. " It was observed at all the localities 

 of these layers (fucoidal layers) on the Mohawk." 



A comparison of the species figured as O. discus with the type 

 of O. levata showed that they are of the same species. The 

 figures of Hall and Vanuxem are both of the under side of the 

 specimen and are very inaccurately drawn. The hypotype in the 

 State Museum is labelled " Canajoharie " and is associated with 

 Ribeiria nuculitiformis. At Canajoharie these species are abund- 

 ant. Prof. Whitfield's figures of O. complanata and O. levata 

 (Am. Mus. Nat. His. Bull., Vol. II, pi. 48, pi. 7, figs. 18 to 25) 

 show that both are distinct from O. levata. His specimens do 

 not have the sharp margin on the edge of the whorls or the ele- 

 vated spire. Although specimens from the Calciferous formation 

 of other states have been identified as O. levata, I have seen 

 none which were correctly identified as such. 



Distribution. — This species is especially abundant at Ft. Hunter, 

 Tribes Hill and Canajoharie. It also occurs at 

 Little Falls, East Canada Creek and the 

 ' ' Noses ' ' near Yosts. 



Ecculiomphalus multiseptarius Cleland. 

 Am. Pal., Vol. 3, Bull. 13, 1900, p. 11, pi. 15, nigs. 1 to 4. 



Without doubt this species has often t been identified as O. 

 compla?iata. It frequently occurs on weathered surfaces. There 

 is considerable doubt as to the relationship of certain small loosely 

 coiled shells which are figured in Bulletin 13 of Am. Pal., pi. 

 15, figs. 3, 4, as the young of E. multiseptarius. These small 

 forms are very abundant in certain localities, but no forms inter- 

 mediate between them and E. multiseptarius were found in the 

 collections. Until more or better material is available it seems 

 best to include them in the above species. 



Pleurotomaria (?) floridensis Cleland. 



Am. Pal., Vol. 3, Bull. 13, p. 13, pi. 15, fig. 12. 



This species is a rare one in all of the localities where collec- 

 tions were made. It was found at Ft. Hunter and Tribes Hill. 



