96 



BULIvETIN 5 



366 



Nonconformability between Bo- 

 cene and Cretaceous.. 152-153 



in Alabama 153 



in Arkansas 152 



in Georgia 153 



in Mississippi 152 



in Tennessee 152 



in Texas 152 



Nucula, see Pectunculus. 



Nucula gequalis 2 



bella 7 



brogniartii 8 



carinif era 10 



claibornensis 11 



coelata 11 



concentrica .j/7 



pi. 29, fig. 6. 



equalis 2, 19 



Itzvis .^ij 



pi. 29, fig. 5. 



magna 26 



magnifica 26 , 1 68 



media 27 



mediavia 139, 148, 149 



niediavia i6j 



pi. 14, fig. 4. 



obhqua 288 



opulenta 31 



ovula 31, 1 48 



oimla w 168 



pi. 14, fig. 3. 



pectuncularis 33 



pellucida 317 



percrassa 146 



plana 35 



pulcherrima 37 



semen 41 



sedgewickii 41 



Nuculana, see Nucula. 



O 



Oak Hill and vicinity 147 



Oak Hill outcrop, fossil fauna 



of 148 



Oak Hill-Pine Barren section 



126, 145 

 Obeliscus, see Acteon 

 Obeliscus, see Pyramidella. 



Obeliscus perexilis .* 33 



Odontopolys texana 66 



Odontostomia conoidea....io3, 104 



Odostomia conoidea 104 



Oliva 302 



alabamensis 3 



Oliva bombylis 8 



constricta 12 



dubia 17 



gracilis 21 



literata 100 



minima 28 



phillipsii 34 



reticularis 100 



pi. 9, fig. 12. 



reticularis 112 



Olivula, see Ancillaria. 



Olivella galvestonensis 112 



galvestonensis 100 



pi. 9, fig. 13. 



mediavia 139, 144, 148, 149 



mediavia 1^4 



pi. 17, fig. 19. 



sub texana 114 



subtexajia loi 



pi. 10, fig. I. 



Olsen's switch, Ark 130 



Orbis rotella 39 



Ostrea alabamiensis 3 



claibornensis 11 



bellovacina 309 



compressirostra 159 



conipressirostra .^08 



pi. 27, fig. 2. 



convexa 290 



crenulimarginata.......i29, 130 



131, 134, [35, 136, 142, 143 

 144, 147, 149, 150, 151 



crenuliniarginata 159 



pi. II, figs. I, a; pi. 12, 

 fig. I, a; pi. 13, fig. I. 



cretacea 68 



pi. 6, fig. 10. 



denticulifera 135, 159 



divaricata 16 



lingula canis 25 



pincerna 34 



prse-compressirostra 159 



pulaskensis 121, 130, 131 



T32, 134, 135, 141, 143 

 147, 149, 151, 153 



pulaskensis 1 60 



pi. II, figs. 2, a, b, c, 3, a. 



sellseformis 41 



semilunata 41 



tumid ula 159 



at Little Rock 121 



Ostreum polyleptoginglimum..287 

 Owen's section on Fourche 



creek 1 30 



Owl creek marls 137 



