Smithsonian miscellaneous collections . alogue (X 8.) Enlargement of the lower, smaller fragment in fig. , 4. (Natural size.) Photographs of two thin-sections occurringin the same stratum of rock as that represented by fig. S. National Museum, Catalogue No. , 6. (Natural size.) Natural sections through two turbinate formsof growth. U. S. National Museum, Catalogue Nos. 60710,60711. The specimens represented by figs. 1-6 are from the Algonkian:Chuar terrane; Grand Canyon, Arizona. These figures (1-4) were published as figs. 1-4, plate 23, Bull. America, Vol.
Smithsonian miscellaneous collections . alogue (X 8.) Enlargement of the lower, smaller fragment in fig. , 4. (Natural size.) Photographs of two thin-sections occurringin the same stratum of rock as that represented by fig. S. National Museum, Catalogue No. , 6. (Natural size.) Natural sections through two turbinate formsof growth. U. S. National Museum, Catalogue Nos. 60710,60711. The specimens represented by figs. 1-6 are from the Algonkian:Chuar terrane; Grand Canyon, Arizona. These figures (1-4) were published as figs. 1-4, plate 23, Bull. America, Vol. 10, 1898, Walcott: Pre-Cambrian fossiliferousformations. Collenia compacta Walcott 112 Fig. 7. (Natural size.) Natural weathered vertical section showingthe club-shaped growth on the left with the irregularlamellse about it on the right. U. S. National Museum,Catalogue No. 60712. From locality 400a: Algonkian: Siyeh limestone; ContinentalDivide at head of Kipps Creek, Glacial National Park, Montana. LANEOJS COLLECTIONS VOL. 64, NO. 2,. 142 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 DESCRIPTION OF PLATE 16 PAGE Cryptosoon prplijcrum Hall 111 Fig. I. Glaciated exposure of one of the Cryptozoan reef beds of theHoyt limestone, by the roadside near the Hoyt quarry,northwest of Saratoga, New York. Original locality ofHalls figure of the species. This plate is published here through the courtesy of Dr. John , Director of the New York State Museum. It is plate 3of Bulletin 169, 1914, of the Museum. Cryptosoon prolifcrum is illustrated and referred to in my paperon the New York Potsdam-Hoyt Fauna. Smithsonian Misc. Coll.,Vol. 57, I92, p. 258, pi. 37- tISCELLANEOUS COLLECTIONS VOL. 64, NO. 2, PI . 16
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