I04 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 64 



Massive — Cellular — Camasia spongiosa 

 Semisphgerical 



Cryptosoon and its allies 

 ? Nczvlar.dia concentrica 

 Weedia tuherosa 

 Collenin undosa 

 CoUenia com pacta 



f Ncwlandia frondosa 



Flabelliform i ^^^«'^'"«^';« lamellosa 



j N ewlandla major 

 I Kinneyia simulans 



Tubiform / ^'-O'^on/a basaltica 



\ Copperia tubiformis 



All of the genera and species are based on the variation in form, 

 as it is impossible with the data now available to determine the 

 genera or species of the Cyanophyceae that built up the widely dif- 

 fering forms described in this paper. They all agree in not having 

 the structure of the higher algae, Corallinacese, etc. All appear to 

 have been deposited as successive layers, the inner and older layers 

 serving as a foundation on which the younger filaments grew in 

 variously arranged forms. In the absence of the identification of the 

 actual algae that built up the structure found in the fossil state, a 

 purely artificial classification has been adopted that includes a num- 

 ber of new generic and specific names as given above. 



DESCRIPTION OF GENERA AND SPECIES 

 NEWLANDIA, new genus 



Alore or less irregular semispherical or frondlike forms built up of 

 concentric, subparallel, subequidistant thin layers that may be con- 

 nected by very irregular, broken partitions. 



Genotype. — Neivlandia frondosa, new species. 



Straiigraphic range. — Lower portion of Newland limestone. 



Geographic distribution. — Eastern slope of Big Belt Mountains, 

 jMontana. 



Observations. — The compact, semispherical forms of Neivlandia 

 have regular concentric laminations that recall the laminated struc- 

 ture of some forms of CoUenia and Cryptosoon. They differ in 

 having more regular and broader interspaces devoid of the fine lami- 

 nations so characteristic of Cryptozoon. It is not improbable that 

 Neivlandia concentrica (pi. 5, figs. 2, 3) may ultimately be found 

 to be identical with the concentric forms of A^. frondosa (pi. 5, fig. 

 4; pi. 6, figs. I, 2; pi. 7). but with the specimens now available for 



