164 



PROTOZOA. 



[RHA. SPH. 



infundibulum, Hall, 1861, Geo. Rep. Wis., 

 p. 16, Niagara Gr. 



insularis, Billings, 1866, Catal. Sil. Foss. 

 Antic., p. 29, Anticosti Gr. 



iowensis, Owen, 1852, (Selenoides iowen- 

 sis,) Geo. Sur. Wis., Iowa, and Minn., 

 p. 587, Trenton Gr. 



jonesi, Billings, 1865, Pal. Foss., vol. 1, p. 

 389, Low. Held. Gr. 



FIG. 119. Receptacnlites 

 occidentalis, showing the tubes. 



mammillaris, Walcott, 1885, Monog. U. S. 



Geo. Sur., vol. 8, p. 65, Chazy Gr. 

 monticulatus, Hall, 1883, Rep. St. Geol., 

 pi. 23, fig. 3-11, Low. Held. Gr. 



neptunei, DeFrance, 

 1827, Diet. des. Sci. 

 Nat., vol. 45, p. 5. 

 Not an American 

 species. 



occidentalis, Salter, 

 1859, Can. Org. 

 Rem., Decade 1, p. 

 45, Trenton Gr. 

 ohioensis, Hall & 

 Whitfield, 1875, 

 Ohio Pal., vol. 2, p. 

 123, Niagara Gr. 

 oweni, Hall, 1861, 

 Geo. Rep. Wis., p. 

 13, and Geo. Sur. 

 111., vol. 3, p. 302, 

 Galena Gr. 

 reticulatus, Owen, 

 1844, (Orbituloides reticulata,) Rep. on 

 Minn. Lands, p. 70, Niagara Gr. 



FIG. 120. Receptacu- 

 lltes occidentalis, 

 showing the endor- 

 hin, the pores at the 

 angles of the plates, 

 ana deeply concave 

 nucleus. 



FIG. 121. Receptaculites occidentalis, showing 

 the nucleus and ectorhin. 



sacculus, Hall, 1879, Desc. New Species 

 Foss. from Waldron, Ind., p. 1, and llth 

 Rep. Geo., and Nat. Hist, Ind., p. 222, 

 Niagara Gr. 



squamifer, Hall, 1859, (Dictyocrinus 

 squamifer,) Pal. N. Y., vol. 3, p. 135, 

 Low. Held. Gr. 



subturbinatus, Hall, 1863, Trans. Alb. 

 Inst., vol. 4, p. 224, Niagara Gr. 



sulcatw, Owen, 1844. This name was pre- 

 occupied by Goldfuss, and the species 

 is now named R. oweni. 



tessellatus, Winchell & Marcy, 1865, Mem. 

 Bost. Soc. Nat. Hist., vol. 1, p. 85, 

 Niagara Gr. 



RHABDAEIA, Billings, Pal. Foss., vol. 1, p. 

 357. [Ety. rhabdos, rod.] Small, cylin- 

 drical bodies, with a rough surface and 

 a perforation in the center. Type R. 

 fragilis. 



fragilis, Billings, 1865, Pal. Foss., vol. 1, 



p. 357, Calciferous Gr. 



furcata, Billings, 1865, Pal. Foss., vol. 1, 



p. 358, Calciferous Gr. 



RHOMBODICTYON, Whitfield, 1886, Bull. Am. 

 Mus. Nat. Hist., vol. 1, p. 347. [Ety. 

 rhombos, rhomb ; dictyon, net.] Globu- 

 lar, discoid, or cyathiform, composed of 

 two or more sets of rods crossing each 

 other at various angles, but not divid- 

 ing, and leaving rhombic spaces filled 

 with another substance. Type R. reni- 

 forme. 



discum, Whitfield, 1886, Bull. Am. Mus. 

 Nat. Hist,, vol. 1, p. 348, Utica Slate. 



reniforme, Whitfield, 1886, Bull. Am. Nat, 

 Hist., vol. 1, p. 347, Utica Slate. 



reniforme var. rhombiforme, Whitfield, 

 1886, Bull. Am. Mus. Nat. Hist., vol. 1, 

 p. 348, Utica Slate. 



Rotalia, Lam,arck, 1804, Ann. Mus. [Ety. 

 rota, wheel.] Not Palaeozoic. 



baileyi, see Endothyra baileyi. 

 Saccammina, Sari?, 1868, Vidensk-Selsk. 

 Forhandl., p. 248. [Ety. diminutive of 

 sakkos, a bag.] Not American Palae- 

 ozoic. 



eriana, Dawson, 1881, Can. Nat., vol. 10, 



syn. for Calcisphaera robusta. 

 SACCOSPONGIA, Ulrich, 1879, Am. Geo., vol. 

 34, p. 242. [Ety. sakkos, bag; spongia, 

 sponge.] Subcylindrical, with a central 

 cloacal cavity extending through it; 

 walls porous, traversed with tortuous 

 branching canals intercommunicating 

 with each other. Type S. rudis. 



danvillensis, Ulrich, 1889, Am. Geol., vol. 

 3, p. 243, Trenton Gr. 



rudis, Ulrich, 1889, Am. Geol., vol. 3, p. 



242, Trenton Gr. 



Scyphia, Oken, 1815. Not American Palae- 

 ozoic. 



digitata, see Brachiospongia digitata. 



stellata, Troost, 1840, not properly defined. 

 Selenoides, Owen, 1852, syn. for Recepta- 

 culites. 



iowensis, see Receptaculites iowensis. 

 Siphonia, Parkinson, 1820, Organ. Rem. 

 Not American Palaeozoic. 



cratera, see Palseomanon cratera. 



imbricato-articulata, see Astylospongia im- 

 bricato-ar ticu lata . 



prsemorsa, see Astylospongia praemorsa. 

 Sphenopterium, Meek & Worthen, 1860, syn. 

 for Palaeacis. 



compressum, see Paleeacis compressus. 



cuneatum, see Palaeacis cuueiformis. 



enorme, see Paleeacis enormis. 



enorme var. depressum, see Palaeacis enor- 

 mis var. depressus. 



obttisum, see Palseacis obtusus. 



