234 



NEW YORK STATE MUSEUM 



Murchison, cited, 23 5 , 23 7 , 47 8 

 Murchisonia bicincta, 30 9 -31 2 

 perangulata, 31 3 



Nautilus liratus, 125 2 , 131 2 



cf. magister, 131 2 

 Nephriticeras, 172 6 



bucinum, 125 2 , 131 3 , 152 1 . 156 s , 

 172 6 

 Nicholson, H. Alleyne, cited, 13 T , 13 9 , 



43 5 , 44 2 , 45 2 , 51 3 , 51 9 , 52°, 53 2 , 53 5 

 Niobe, 61 3 . 



Norma nskill shales, age, G\ 113 s 

 Nucleocrinus lucina, 133 2 

 Nncleospira, 166 3 



concinna, 134 3 , 147 6 , .166 3 

 Nucula levata, 28 s 

 Nuculites nyssa, 142 4 , 143 4 , 144 6 



oblongatus, 135 s 



triqueter, 142 s , 143 2 , 143 4 , 144°. 

 145 2 



Oehlert, D. P., cited, 42 9 

 Oehlertella pleurites, 197 6 

 Onondaga county, Agoniatite lime- 

 stone, 117 3 -19 3 

 Ontario county, Agoniatite lime- 

 stone, 120 4 

 Onychochilus, 170 1 



nitidulus, 131 s , 133 s , 146°, 147 s , 

 170 1 



explanation of plate, 223 2 

 Opliileta ottawensis, 34 7 



owenanus, 34 7 

 Oibiculoidea minuta, 115 3 

 Orthis, 24 5 



costalis, 24 7 



dichotoma, 6 s 



insularis, 106 3 



cf. lenticularis, 136 3 , 136 9 



perveta, 26 1 



plicatella, 25 1 



testudinaria, 25 s 



tricenaria, 22°, 24 fi , 95 4 , 96\ 96 s , 

 98 2 , 107 9 

 Orthoceras, 122 7 , 157 6 , 158 3 , 171 4 , 20O 3 



aegea, 131 3 , 152 3 , 153 7 , 172 1 



annellus, 39* 



Orthoceras {continued) 

 aptum, 125 4 



bilineatum, 4\ 5", 39 2 , 39 6 , 39 7 , 39 8 

 constrictum, 125 4 

 eriense, 131 4 , 152 3 , 155 2 , 155 9 , 



156 5 , 17P-72 1 

 exile, 133 7 , 146 2 , 146 4 , 147\ 147 8 , 



171 4 , 171 6 , 175« 

 fenestrulatum, 131 3 , 153 3 , 172 4 

 fustis, 125 4 

 incarceratum, 135° 

 laqueatum, 39 G " 

 lima, 135 6 



marcellense, 117 7 , 123 s , 125 4 , 131 s . 

 133 7 , 147 2 , 152\ 153 2 , 155% 156 2 . 

 157 4 , 171 G , 175 5 

 staffordense, 131 4 

 subulatum, 115 s , 131 3 , 135°, 142 3 , 

 142 s , 142 9 , 143 G , 144 7 , 144 s , 145 3 

 Orthonota (?) parvula. 145 2 

 Orthonychia attenuatum, 150 s , 170 r> 

 Orthopora tortalinea, 150 6 , 156' 

 Orthotheca, 36 7 

 Orthothetes, 158 T 



arctostriatus, 132 s , 151 6 , 152 s , 



158 7 

 bellulus, 136 3 , 137 1 

 chemungensis, 132 s 

 pandora, 136 2 

 Ostracoda, 173 6 



Otsego county, Agoniatite limestone. 

 121 6 -23 5 



Palaeocystites semiradiatus, 12 3 



tenuiradiatus, 8 3 , ll 6 

 Palaeoneilo, 134 1 



sp. 146 8 



plana, 135° 

 Palaeopteris, 201 3 

 Palanatinas, 197 7 

 Tanenka, 115 4 , 129 3 , 167 s 



lincklaeni, 134 1 , 144 4 , 145 2 , 146 1 , 

 167 5 



cf. lincklaeni, 136 7 



mollis, 153 1 , 167 s 

 var. costata, 132 1 



radians, 132 1 



yentricosa, 125 s 



