PALEONTOLOGICAL INDEX 



541 



hauerii, 471. 

 marginata, 472. 

 sagittula, cxvili ; ipt. 

 subangulata, cxviii ; .}~S. 

 Textulariae, 471. 

 Textulai-idae, .^69. 

 Thallophyta, 1, ^S7. 

 Thecachampsa, 64. 



antiqua, xciv ; 66, 67. 

 antiquus, 65. 

 contusor, xciv ; 65, 66, 67. 

 sicaria, xciv ; 6a, 66. 

 sericodon, xciv ; 65. 

 Thecodonta, 332. 



calvertensis, cxii ; iZ%. 

 Tlieonoa, 1)06. 



glomerata, cxvi ; ifiG, 407. 

 Thoracica, 9^. 

 Thovana, 27^. 

 Thiracia, cxxxiv ; 359. 



conradi, Ixxiv, Ixxxvi, Ixxxvii, cxii, 



cxxxiv ; %9. 

 corbuloides, 360. 

 declivis, 359. 

 Thraciidse, &59. 

 Timoclea, cliii. 

 Tornatelia ovoides, 131. 



pusilla, 132. 

 Tornatinidae, iS.J. 

 Toxoglossa, clii ; U^. 

 Tragula, 22^. 



Trematodiscus concentricus, 455. 

 Tretosphys gabbi, 9, 10. 

 grandaevus, 9. 

 lacertosus, 11, 20. 

 I'uschenbergerl, lu. 

 uraeus, 13. 

 Tretulias, 35, 36, 52. 



buccatus, xciv ; 52. 

 Triceratium acutum, 492. 

 amcenum, 495. 

 condecorum, 492. 

 intei-punctatum, 494. 

 obtusum, 494. 

 orbiculatiim, 495. 

 robustum, 495. 

 secernendum, 495. 

 semicirculai-e, 494. 

 tessellatum, 495. 

 Trichechus, 5S, 57. 



giganteus, xciv ; m. 

 Trichotropis dalli, 240. 

 Trigonostoma, cxxiv ; 163, 1Q5. 



biplicifera, 163. 

 Trionychia, 6Z. 

 Trionyx, Q%. 



cellulosus, xciv ; 62, 63. 

 sp., xciv ; 53. 



Tritia, clii. 



arata, 190, 191. 

 fossulata, 189. 

 Integra, 197. 

 marylandica, 198, 199. 

 multirugata, 189. 

 ovata, 190, 197. 

 porcina, 190. 

 quadrata, 198. 

 trivitata, 195. 

 trivittatoides, 192. 

 trivittatoides var. elongata, 192. 

 TritonidiB, 225. 

 Tritonifusus migrans, 186. 

 Tritonium, cxxvi ; 225. 



centrosum, civ ; Z'&o. 

 TrochidjB, 256. 

 Trocliita centralis, 248. 

 concentrica, 248. 

 perarmata, 247. 

 Trochus apertus, 247. 

 belliis, 256. 

 conchyliophorus, 251. 

 eboreus, 259. 

 humilis, 261. 

 lens. 261. 

 peralveatus, 261. 

 philanthropus, 256. 

 philantropus, 256. 

 reclusus, 262. 

 Tropbon, cxxvi ; 202. 

 cancellata, 207. 

 chesapeakeanns, cii ; ZfiZ. 

 sp., cii ; 204. 

 tetricus, cii ; 202, 203. 

 tetricus var. laevis, cii ; 203. 

 Troschelia, 184. 

 Truncatula, 405. 

 Truncatiilina, 463, 464. 

 boueana, 465. 

 grosserugosa, 466. 

 lobatula, cxviii ; Ifik, 465. 

 refulgens, 465. 

 variabilis, cxviii ; 464, 1,60. 

 wuellerstorfl, 465. 

 Trygon, 71, 72, 92. 

 Tubicola, ifiO. 

 Tubinares, M. 

 TubulariiB, k^S. 

 Tudicla, clii. 



Turbinella demissa, cii ; rs. 

 Turbo conoideus, 219. 

 eboreus, 259. 

 irroratus, 240. 

 simillimus, 223. 

 subulata, 217. 

 Turbonilla, cxxvi ; Z'ZZ. 

 exarata, 223. 

 gubernatoria, civ ; 21,lt. 

 interrupta, civ, cxxvi ; 22^. 

 nivea, civ, cxxvi ; 222. 



