﻿1 6 Bulletin 18 42 



of cord formed on a flat surface, the diameter of the coil being 

 usually about an inch." " From analogy of formation it evi- 

 dently appertains to the same genus with O. levata." "It 

 is more rare than O. levata but is occasionally met with in the 

 same localities on the Mohawk." 



In the collections from the Mohawk Valley no specimens which 

 correspond to the above description were found. Occasionally 

 weathered specimens of Pleurotomaria hunterensis are found in 

 the localities mentioned by Vanuxem and Hall which present the 

 appearance of a fiat coil. In the State Museum at Albany some 

 of the specimens labelled O. complanata are unquestionably P. 

 hunterensis. The type specimen has apparently been lost. 



There is little doubt that P. hunterensis has usually been iden- 

 tified as O. complanata in the Mohawk Valley for the past fifty 

 years. Ecculiomphalus multiseptarius is a rarer form but has 

 probably also often been called P. complanata. 



The appearance of weathered specimens (see pi. 4, fig. 1) gives 

 the impression of a " flat coil " and it is possible that Vanuxein's 

 description is incorrect, but until the type specimen is found this 

 can not be proved. 



Pleurotomaria hunterensis Cleland. PI. 4, Figs. 1, 2. 



Am. Pal., Vol. 3, Bull. 13, 1900, p. 12, pi. 17, figs. 1, 2, 7, S. 



The localities given by both Vanuxem and Hall for O. com- 

 planata are the same as those in which our species occurs. In 

 these localities no fossil which resembles O. complanata was found 

 except the above species. Vanuxem's description is so plain that 

 had the distribution been different there would have been no 

 doubt as to the determination. 



Distribution. — Found occasionally on the weathered surfaces of 

 the Calciferous in many parts of the Mohawk 

 Valley : Ft. Hunter, Tribes Hill, "The Noses" 

 near Yosts, Canajoharie, St. Johnsville, East 

 Canada Creek, and Little Falls. 

 (See discussion under O. complanata.) 



Ophileta levata Vanuxem. 



O. levata, Geology of the Third Dist., N. Y., 1842, p. 36, fig. 1. 



" " v Pal. N. Y., Vol. 1, p. 11, fig. 2, pi. 3, figs. 4, 5. 



" " Am. Mus. Nat. Hist., Bull., Vol. 2, p. 48, pi. 7, figs. 1S-25. 

 O. discus, Am. Pal., Vol. 3, Bull. 13, p. 12, pi. 15, figs. 5, 6. 

 Schizostoma levatum, N. Y. State Mus., Bull. 65, 1903, p. 561. 



