266 



NEW YORK STATE MUSEUM 



Obolella gemma Billings 



1622 7 y 1 hypotype Obolella gemma Billings. Canadian 



naturalist and geologist. 1872. new ser. 6: 218. 



Walcott. United States geological survey bulletin 30, 

 1886. pi. 10, fig. 2a. 



Walcott. 10th annual report of the United States 

 geological survey. 1890. pi. 72, fig. 2. 



Hall & Clarke. Paleontology of New York. 1892. 

 v. 8, pt 1, pi. 2, fig. 42. 



Lower Cambric Troy N. Y. 



S. W. Ford purchase 



1623 78 a B1 hypotype Hall & Clarke. Paleontology of New York. 



1892. v. 8, pt 1, pi 2, fig. 43 [34]. 

 Lower Cambric Troy N. Y. 



S. W. Ford purchase 



1624 7 y * hypotype Hall & Clarke. Paleontology of New York. 



1892. v. 8, pt 1, pi. 2, fig. 44. 

 Lower Cambric Troy N. Y. 



S. W. Ford purchase 



Obolella polita Hall 



1625 ' !8 y* hypoplastotype Lingula? polita Hall. Annual 



report of the geological survey of Wisconsin. 1861. p. 24. 



Obolella polita Hall & Clarke. Paleontology of 

 New York. 1892. v. 8, pt 1, pi. 2, fig. 38. 



Potsdam sandstone Trempaleau Wis. 



Obolella pretiosa^ Linnarssonia pretiosa 

 Obolella transversa see Linnarssonia transversa 

 Obolus conradi w Dinobolus conradi 

 O b o 1 u s g a 1 1 e n s.i s see Rhinobolus galtensis 



oehlertella Hall & Clarke 



Oehlertella exilis Hall 



1626 type Lingula exilis Hall. 13th annual report of the 



New York state cabinet of natural history, i860, p. 76, 



77> fi g- 2 - 



Hall. Paleontology of New York. 1867. v. 4, pi. 1, 

 fig. 8. 



Marcellus shale Bridgewater N. Y. 



F. B. Meek, R. P. Whitfield and C. Van Deloo,coll. 1S57 



