402 



GASTEROPODA. 



[CYR. ECC. 



FIG. 608. Cyrto- 

 lites tjlegaus. 



carinatus, S. A. Miller, 1874. Cin. Quar. 



Jour. Sci., vol. 1, p. 311, Ulica Slate. 

 compressus, Conrad, 1838, (Phragmolites 

 compressus,) Ann. Rep. N. Y., p. 119, 

 and Pal. N. Y., vol. 1, p. 188, Black Riv. 

 and Trenton Grs. 

 conradi, Hall, 1862, Geo. Rep. Wis., p. 55, 



Trenton Gr. 



costatus, see Bucania costata. 

 cristatus, Safford, 1869, Geo. of Tenn., p. 



289, Nashville Gr. 

 desideratus, Billings, 1866, Catal. Sil. Foss. 



Antic., p. 21, Hud. Riv. Gr. 

 dyeri, Hall, 1871, 24th Rep. N. Y. Mus. 

 Nat. Hist., p. 230, Hud. Riv. Gr. 



elegans, S. A. Miller, 1874, 

 Cin. Quar. Jour. Sci., 

 vol. 1, p. 310, Hud. 

 Riv. Gr. 



expansus, Hall, 1859, Pal. 

 N. Y., vol. 3, p. 479, 

 Oriskany sandstone, 

 filosus, Emmons, 1842, 

 Geo. Rep. 2d Dist. N.Y., 

 p. 372, and Pal. N. Y., vol. 1, p. 190, 

 Trenton Gr. 

 gillanus, White & St. John, 1868, Trans. 



Chi. Acad. Sci., p. 123, Coal Meas. 

 imbricatus, Meek & Worthen, 1868, Geo. 



Sur. 111., vol. 3, p. 340, Hud. Riv. Gr. 

 magnus. S. A. Miller, 1878, Jour. Cin. 

 Soc. Nat, Hist,, vol. 1, p. 103, Hud. 

 Riv. Gr. 



mitella, see Cyrtonella mitella. 

 nitidulus, Ulrich, 1878, 

 Jour. Cin. Soc. Nat. 

 Hist, vol. 2, p. 12,TJtica 

 Slate Gr. 



ornatus, Conrad, 1838, // 

 Ann. Rep. N. Y., p. 118, 

 and Pal. N. Y., vol. 1, 

 p. 308, Hud. Riv. Gr. 

 pannosus, Billings, 1866, 

 Catal. Sil. .Foss. Antic., 

 p. 20, Hud. Riv. Gr. FlQ . m ._ Cyrto _ 

 pileolus, see Cyrtonella lites ornatus. 



pileolus. 



sinuatus, Hall & Whitfield, 1877, U. S. 

 Geo. Expl. 40th parallel, vol. 4, p. 237, 

 Quebec Gr. 

 sinuosus, Hall, 1876, 28th Rep. N. Y. 



Mus. Nat Hist., p. 178, Niagara Gr. 

 trentonensis, Conrad, 1842, Jour. Acad. 

 Nat. Sci., vol. 8, p. 270, and Pal. N. v ., 

 vol. 1, p. 189, Trenton Gr. 

 CYRTONELLA, Hall, 1879, Pal. N. Y., vol. 5, 

 pt. 2, p. 123. [Ety. diminutive of Cyr- 

 tolites.] Shells ovoid, trumpet-shaped ; 

 volutions one or more in the 

 same plane ; apex minute, 

 making about a single turn, 

 and rapidly expanding be- 

 yond ; peristome entire ; dor- 

 Fio 070 8um angular or subcarinate ; 

 Cyrtonella surface sculptured ; dis- 

 pileolus. tinguished from Cyrtolites 



by the rapid expansion. Type C. 

 mitella. 



mitella, Hall, 1862, (Cyrtolites mitella,) 

 15th Rep. N. Y. Mus. Nat. Hist., p. 61, 

 and Pal. N. Y., vol. 5, pt. 2, p. 123, 

 Ham. Gr. 



pileolus, Hall, 1862, (Crytolites pileolus,) 

 15th Rep. N. Y. Mus. Nat. Hist, p. 61, 

 and Pal. N. Y., vol. 5, pt. 2, p. 125, 

 Ham. Gr. 



DAWSONELLA, Bradley, 1874, Am. Jour. Sci., 

 3d series, vol. 7, p. 151. [Ety. proper 

 name.] Helicoid, having a thin plate 

 attached to the columella, covering half 

 or more than half of the aperture of the 

 shell as in Navicella. Type D. meeki. 



meeki, Bradley, 1872, (Anomphalus 

 meeki,) Am. Jour. Sci., 3d series, vol. 

 4, p. 88, Coal Meas. 



DENTALIUM, Linnaeus, 1740, Syst. Nat., 2d 

 Ed., p. 64. [Ety. dens, tooth.] Shell 

 elongate, terete, or angular, smooth, 

 costate, or striate; aperture circular; 

 lip simple, entire ; margin of the pos- 

 terior opening without a fissure. Type 

 D. elephantinum. 



aciculatum, see Coleolus acicu- 

 latus. 



acutisulcatum, Gurley, 1883, 

 New Garb. Foss., p. 7. Pub- 

 lication not valid. 



annulostriatum, Meek & Wor- 

 then, 1870, Proc. Acad. Nat. 

 Sci., p. 45, and Geo. Sur. 

 111., vol. 5, p. 589, Coal Meas. 



barquense, Winchell, 1862, 

 Proc. Acad. Nat. Sci., p. 425, 

 Marshall Gr. 



canna, White, 1874, Rep. In- Fjo &7l _ 

 vert. Foes., p. 23, and Geo. Denta- 

 Sur. W. 100th Mer., vol. 4, "um ele- 

 p. 156,Carb. Sum" 11 " 



grandaavum, Winchell, 1863, 

 Proc. Acad. Nat, Sci., p. 18, Marshall Gr. 



illinoisense, Worthen, 1883, Geo. Snir. 111., 

 vol. 7, p. 325, and Geo. Sur. 111., vol. 8, 

 p. 145, Kaskaskia Gr. 



martini, Whitfield, 1882, Ann. N. Y. 

 Acad. Sci., vol. 2, p. 203, Up. Held. Gr. 



meekanum, Geinitz, 1866, Garb. undDyas 

 in Neb., p. 13, and Geo. Sur. 111., vol.5, 

 p. 590, Coal M.eas. 



missouriense, Swallow, 1863, Trans. St. 

 Louis Acad. Sci., vol. 2, p. 99, Kaskas- 

 kia Gr. 



obsoldum, Hall. Preoccupied by Schlot- 

 heim in 1832. See D. sublseve. 



primarium, Hall, 1858, Geo. Rep. Iowa, 

 p. 666, Warsaw Gr. 



sublreve, Hall, 1877, 1st Ed. Am. Pal. 

 Foss., p. 244, Coal Meas. Proposed in- 

 stead of D. obsoletum, Hall, 1858, Geo. 

 Sur. Iowa, which was preoccupied. 



venustum, Meek & Worthen, 1861, Proc. 

 Acad. Nat. Sci., p. 145, and Geo. Sur. 

 111., vol. 2, p. 284, St. Louis Gr. 

 Discolites, Emmons, syn. for Cyclora. 



minutus, see Cyclora minuta. 

 ECCYLIOMPHALUS, Portlock, 1843, Geol. Rep. 

 Lond., p. 411. [Ety. ecculiomphalus, un- 

 rolled umbilicus.] Shell discoid, a few 



