76 



NEW YORK STATE MUSEUM 



Trilobites, 50. 

 Tropidocycliis hyalinus, 61. 

 Tropidoleptiis carinatus, 46, 49, 50, 



52, 53, 55. 



milt, pygmaeiis, 58. 

 Tiilly limestone, 6, 18, 23-25; thick- 

 ness, 23; fossils, 56-58. 

 Tully pyrite, 56. 

 Turbo sliumardi, 43. 

 Turrilepas cancellatus, 42. 



devonicus, 47. 



flexuosus, 42. 



foliatns, 47. 



nitidulus, 47. 



squama, 47. 



tener, 47. 



TJlsterian group, 6. 



Vanuxem, cited, 16, 17. 



West Hill flags and shales, 6, 35-36 ; 



thickness, 35; fossils, 63-64. 

 West River shale, 6, 28-29; fossils, 



59-60. 

 Whitfieldella laevis, 9. 



sulcata, 11, 40. 

 Wood, Elvira, cited, 45. 

 Worms, 45, 47, 48, 51, 52, 54. 



Zaphrentis sp., 64 

 complanata, 44. 

 fastigata, 44. 

 gigantea, 44. 

 halli, 48. 

 simplex, 48. 

 tabulata, 44. 



