By Thomas Wayland Vaughan, United States National Museum

Writer: Washington : government. Print. Off. ebook date: 1919 topics: Paleontology Paleontology Paleontology Notes: this can be an OCR reprint. there's a variety of typos or lacking textual content. There aren't any illustrations or indexes. for those who purchase the overall Books version of this booklet you get loose trial entry to Million-Books.com the place you could make a choice from greater than 1000000 books at no cost. it's also possible to preview the booklet there.

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Magnification 100 diameters. vte 9. LitJiothainniuin isfhmi M. A. Howe. A section of the type material (MacDonald and Yaughan, station 6021. Cat. No. ). enlarged 100 diameters. The section shows the welidevelo}>ed " coaxial " hypothallium, the smaller-celled perithallium, and the conceptacles with the coarse intersporangial tissue characteristic of the genus Lithothammuni. \te 10. Lifhothamniiim isthmi M. A. Howe. ;, Cat. No. 35305. ), natural size, showing fossil embedded in matrix, in both weathered and freshly broken surfaces.

S. NATIONAL MUSEUM BULLETIN Archaeolithothamnium episporum M. For explanation of plate see page 12. a. Howe. 103 PL. 4 U. S. NATIONAL MUSEUM BULLETIN 2 4 Archaeolithothamnium episporum M. a. Howe. For explanation of plate see page 12. 103 PL. 5 U. S. NATIONAL MUSEUM BULLETIN Archaeolithothamnium episporum M. For explanation of plate see page 12. a. Howe. 103 PL. 6 U. S. NATIONAL MUSEUM BULLETIN ,-^^ I. 2. 103 PL. 7 5- LiTHOTHAMNIUM VAUGHANII M. A. HOWE. M. A. Howe. 3. For explanation of plate see page LiTHOTHAMNIUM ISTHMI 13.

A. Howe. Photographs of radio-vertical sections of decalcified material Howe Fig. (Point Tore, 6832), enlarged 200 diameters. 1. Section showing sporangia and tetra spores. 2. Section showing emptied sporangia, form and arrangement of weakly developed hypothallium, etc. i^eri- thallic cells, a Plate 4. ArchaeoUthothaninium cpisporum M. A. Howe. A Pleistocene fossil, " from flats near Mount Hope, five feet above tide level," D. F. MacDonald 6039, 1911, natural size. Plate 5. ArchaeolithoHiariiniiim episponuii M.

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