. Smithsonian miscellaneous collections . RECENT ALGAE 1. Cladophora gracilis (Griffith) Kiitzing 2. Dumontla flliformis (Huds.) Grevllle SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 67, NO. 5, PL. 52. 1. Marpolla spissa Walcott 2. Moranla reticulata Walcott NO. 5 MIDDLE CAMBRIAN ALGAE 253 DESCRIPTION OF PLATE 52 PAGE Marpolia spissa Walcott 234 Fig. 1. (X2.) Portions of a thallus with the filaments twisted into stems and extending as tufts as they branch at narrow angles. U. S. National Museum, Catalogue No. 35403. ic. (X2.) A specimen with the filaments more loosely arranged than in fig. 1. U.
. Smithsonian miscellaneous collections . RECENT ALGAE 1. Cladophora gracilis (Griffith) Kiitzing 2. Dumontla flliformis (Huds.) Grevllle SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 67, NO. 5, PL. 52. 1. Marpolla spissa Walcott 2. Moranla reticulata Walcott NO. 5 MIDDLE CAMBRIAN ALGAE 253 DESCRIPTION OF PLATE 52 PAGE Marpolia spissa Walcott 234 Fig. 1. (X2.) Portions of a thallus with the filaments twisted into stems and extending as tufts as they branch at narrow angles. U. S. National Museum, Catalogue No. 35403. ic. (X2.) A specimen with the filaments more loosely arranged than in fig. 1. U. S. National Museum, Catalogue No. 35404. lb. (X4-) Enlargement of a portion of the surface of a frag-ment of shale that is thickly strewn with broken filamentsof this species. U. S. National Museum, CatalogueNo. 35405. MORANIA ? RETICULATA Walcott 233 Fig. 2. (Natural size.) A frondlike mass of this species partly cov-ered by Morania confluens. U. S. National Museum,Catalogue No. (X4-) Enlargement of a portion of specimen represented byfig. 2, to illustrate the lacunae of the frond. The specimens represented on this plate are all from locality 35k,Middle Cambrian: Burgess shale mem
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Keywords: ., bookauthorsm, bookcentury1800, bookdecade1860, booksubjectscience
