. Bulletin - United States National Museum. Science. 326 BITLLETIN- 7*7, UNITED STATES NATIONAL MUSEUM. memoration in a small way of Professor Hall's work upon fossil Bry- ozoa, and particularly upon this generic group. The zoaria of Hallopora are almost always solid ramose and bushy. In the perfect state the apertures are closed by perforated, orna- mental covers which, as growth proceeds, form the diaphragms of succeeding layers. Genotype.—CaUopora elegantula Hall. Early Silurian of America and Europe. HALLOPORA MULTITABTJLATA (Ulrich). Text fig. 202. Monotrypella muUitabulata Ulrich, Fourte
. Bulletin - United States National Museum. Science. 326 BITLLETIN- 7*7, UNITED STATES NATIONAL MUSEUM. memoration in a small way of Professor Hall's work upon fossil Bry- ozoa, and particularly upon this generic group. The zoaria of Hallopora are almost always solid ramose and bushy. In the perfect state the apertures are closed by perforated, orna- mental covers which, as growth proceeds, form the diaphragms of succeeding layers. Genotype.—CaUopora elegantula Hall. Early Silurian of America and Europe. HALLOPORA MULTITABTJLATA (Ulrich). Text fig. 202. Monotrypella muUitabulata Ulrich, Fourteenth Ann. Rep. Geol. Nat. Hist. Surv. Minnesota, 1886, p. 100. CaUopora muUitabulata Ulrich, Geol. and Nat. Hist. Surv. Minnesota, vol. 3, pt. 1, 1893, p. 280, pi. 23, figs. 11,12,16,17, 24-26, 30, 31; Zittel's Textbook of Paleontology (Eng. ed.), 1896, p. 274, fig. 456 C, D.—Sardeson, Journ. Geol., vol. 9, 1901, p. 9, pi. A, figs. 5-6(7.—RxjEDEMANN, Bull. 49, New York State Mus., 1901 [1902], p. 13.—NiCKLES, Kentucky Geol. Surv., Bull. 5, 1905, p. 42, pi. 1, fig. 2.—Bassler, Proc. U. S. Nat. Mus,, vol. 30, 1906, p. 22, pi. 1, figs. 5-7. Several specimens in the collections from the Wassalem beds at Uxnorm are externally and internally so similar to examples of Hal- lopora multitalulata from the Black River and lowest Trenton rocks of Minnesota that were the two lots mixed they could not be sepa-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States National Museum; Smithsonian Institution; United States. Dept. of the Interior. Washington : Smithsonian Institution Press, [etc. ]; for sale by the Supt. of Docs. , U. S. Govt Print. Off.
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