yS SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 



Description of genera and species — Continued page 



N ewlandia lamellosa, new species (pi. 10, figs, i, 2) 106 



N ewlandia major, new species (pi. 9, fig. 3) 106 



Kinneyia, new genus 107 



Kinneyia simulans, new species (pi. 11, fig. 3) 107 



Weedia, new genus 107 



Weedia tuherosa, new species (pi. 11, figs. 1,2) 108 



Greysonia, new genus 108 



Greysonia basaltica, new species (pi. 17, figs, i, 2; pi. 18, figs, i, 2) . . . . 109 



Copperia, new genus 109 



Copperia ttibiformis. new species (pi. 19, figs. 1-3) no 



Collenia, new genus no 



Collenia compacta, new species (pi. 15, fig. 7) n2 



Collenia ? freqiiens (Walcott) (pi. 10, fig. 3) 113 



Collenia undosa, new species (pi. 13, figs, i, 2; pi. 14, figs, i, 2).... 113 



Collenia ? species undetermined 114 



Archaozoan acadieiisc Matthew 114 



Camasia, new genus 115 



Camasia spongiosa. new species (pi. 9, figs, i, 2; pi. 12, figs, i, 2; pi. 20, 



figs. 2-6) 115 



Gallatinia, new genus 116 



Galldtiiiia pcrtcxa, new species (pi. 2t,, figs. 1,2) 116 



ILLUSTRATIONS 



PLATES FACING PAGE 



4. Lake Balls and Layer Deposit (Blue-green algae) 118 



5. Lake Ball, N ewlandia concentrica, and Newlandia frondosa 120 



6. Newlandia frondosa 122 



7. N ewlandia frondosa 124 



8. N ewlandia frondosa 126 



9. Camasia spongiosa and N ezvlandia inajor 128 



10. N ezvlandia lamellosa and Collenia .' frcqucus 130 



11. Weedia tuherosa and Kinneyia simulans 132 



12. Camasia spongiosa 134 



13. Collenia undosa 136 



14. Collenia undosa 138 



15. Collenia occidcntale and Collenia compacta 140 



16. Cryptozoon proliferum 142 



17. Greysonia basaltica 144 



18. Greysonia basaltica 146 



19. Copperia ttibiformis 148 



20. Microscopic cells of recent Blue-green algae and their Algonkian rep- 

 resentatives : N ewlandia frondosa and Camasia spongiosa 150 



21. Helminthoidichnitcs ? neihartcnsis, Helniinthoidichnitcs ? spiralis, 



H ehninthoidichnites meeki, Planolites corrugatus, and Planolites su- 



perbus 152 



22. Belti)ta dajiai 154 



23. Gallatinia fcrtcxa 156 



