US. — CAL-] 



MOLLUSCOIDA. 



295 



poriferous space in the center of each 

 disk, round which the radiating ridges 

 occupy a slightly elevated zone. Type 

 B. socialis. 



a. I 



Fig. 459.— Botryllopora socialis. «, Group on coral 

 natural size ; 6, enlarged specimen ; c, enlarged 

 ray to show pores. 



socialis, Nicholson, 1874, Geo. Mag. Lond. 

 n. s., vol. 1, p. 160, Ham. Gr. 

 Buscopora, Ulrich, 1886, Cont. to Am. Pal., 

 p. 22. [Ety. Busk, proper name; poros, 

 perforation.] Zoarium thin, lamellate ; 

 incrusting or free; under surface, with 

 a concentrically wrinkled epitheca ; 

 zocecia tubular, short, with subcircular 

 apertures and a faintly elevated border 

 or peristome ; posterior margin, with a 

 tooth-like process divided at its termi- 

 nation; accessory cells present; inter- 

 stitial spaces vesiculose ; zocecial tubes, 

 with diaphragms. Type B. lunata. 

 dentata, Ulrich, syn. for B. lunata. 



lunata, Rominger, 



1866, (Fistulipora 



lunata,) Proc. 



Acad. Nat. Sci. 



Phil., p. 7, and Pal. 



N. Y., vol. 6, p. 77, 



Up. Held. Gr. 

 lunata var. tubulata, 



Hall, 1887, (Liche- 



nalia lunata var. 



tubulata,) Rep. St. 



Geol. for 1885, pi. 

 31, and Pal. N. Y., vol. 6. p. 78, Up. 

 Held. Gr. 

 Bythopora, Miller & Dyer, 1878, Cont. to 

 Pal. No. 2, p. 6. [Ety. buthos, depths of 

 sea; poros, pore.] Dendroid, branches 

 small, sometimes anastomosing, smooth ; 



Fig. 460.— Buscopora lu- 

 nata. Tangential sec- 

 tion, showing aper- 

 ture or lunarium. 



Fig. 461.— Bythopora fruticosa. 



cell apertures longer than wide, sepa- 

 rated by impressed lines. Type B. 

 fruticosa. 



462. — Bythopora 



arctipora, Nicholson, 1875, (Ptilodictya 



arctipora,) Ann. and Mag., ser. 4, vol. 



15, p. 180, Utica Slate, 

 delicatula, (?) instead of Monticulipora 



delicatula. 

 fruticosa, Miller & Dyer, 1878, Cont. to 



Pal. No. 2, p. 6, Hud. Rtv. Gr. 

 herricki, Ulrich, 1886, 14th Rep. Geo. Sur. 



Minn., p. 99, Trenton Gr. 

 nashvillensis, S. A. 



Miller, 1880, Jour. 



Cin. Soc. Nat. 



Hist., vol. 3, p. 



143, Trenton Gr. 

 striata, Ulrich, (in (| 



press,) Micropa- 



laeontology, p. 10, 



Hud. Riv. Gr. 

 Callopora, Hall, 



1852, Pal. N. Y., 



vol. 2, p. 144. fig. 



[Ety. hallos, beau- na.shvlllensis7 Magni- 



tiful ; poros, pore.] fled " 



Ramose, smooth, or tuberculated ; ceil 



tubes cylindrical; interstitial cells nu- 

 merous!; diaphragmsnumerous,no spini- 



f orm tubuli ; in tercellular space occupied 



by septate tubuli. Type C. elegantula. 

 aculeolata, see Ccelocaulis aculeolata. 

 ?aspera,Hall, 1852, Pal. N. Y., vol. 2, p. 



147, Niagara Gr. 

 bipunclata, Hall, 1884, Rep. St. Geol., p. 



15, syn. for Streblotrypa hamiltonensis. 

 bispinulata, see Orthopora bispinulata. 

 cellulosa, Hall, 1883, Rep. St. Geol., pi. 12, 



fig. 7-9, Low. Held. Gr. 

 cervicornis, Hall, 1879, Desc. New Spec. 



Foss., p. 3, and 11th Rep. Ind. Geo. 



Sur., p. 238, Niagara Gr. 

 cincinnatiensis, Ulrich, syn. for Leioclema 



occidens. 

 diversa, Hall, 1879, Desc. New. Spec. Foss., 

 p. 4, and 11th Rep. 

 Ind. Geo. Sur., p. 

 239, Niagara Gr. 

 elegantula, Hall, 1852, 

 Pal. N. Y., vol. 2, p. 

 144, Niagara Gr. 

 ? exsul, Hall, 1876, (Al- 

 veolites exsul,) 28th 

 Rep. N. Y. St. Mus. 

 Nat, Hist., p. 115, 

 Niagara Gr. 

 fistulosa, Hall, 1883, Rep. St. Geol., pi. 12, 



fig. 1-6, Low. Held. Gr. 

 florida, Hall, 1852, Pal. N. Y., vol. 2, p. 



146, Niagara Gr. 

 geniculata, Hall, 1887, Pal. N. Y., vol. 6, 



p. 75, Up. Held, Gr. 

 hemispherica, see Fistulipora hemispherica. 

 heteropora, see Callojtrypa heteropora. 

 hyale, see Ccelocaulis hyale. 

 incrassata, see Fistulipora incrassata. 

 incontro versa, Ulrich, 1886, 14th Rep. 



Geo. Sur. Minn., p. 96, Trenton Gr. 

 internodata, see Callotrypa internodata. 

 irregularis, see Ccelocaulis irregularis, 

 laminata, Hall, 1852, Pal. N. Y., vol. 2, p. 



146, Niagara Gr. 



Fig 



3.— Callopora 

 exsul. 



