114 SMITHSONIAX MISCELLANEOUS COLLECTIONS VOL. 64 



to 10 cm.) in diameter, but some are a foot (32.7 cm.) or more 

 across. 



Formation and locality. — Algonkian : (400b) Beltian series; Spo- 

 kane shales; 8 miles (12.8 km.) west of White Sulphur Springs 

 at forks of Birch Creek, Meagher County, Montana (M. CoUen, 

 1906). 



COLLENIA ? species undetermined 



The late Professor N. H. Winchell recently sent me, a few days 

 before his death, photographs of a specimen that suggests Collenia. 

 It is made up of 28 vertical columnar bodies which show on the top 

 a roughly hexagonal section. Their average size is about i cm. 

 The columns are made up of concentric lamellae, somewhat like 

 those of Atikokania from the Steeprock series in Canada. 



I have not seen the specimen nor is its origin known. It was found 

 in a ballast gravel of the railroad that came from glacial drift, 

 near St. Paul, Minnesota. 



ARCHiEOZOAN ACADIENSE Matthew 



Archaosoati acadiense Matthew, 1901, Bull. Nat. Hist. Soc, New Brunswick, 

 No. 9, Presidential Address, p. 32 ; also pp. 38-41. 



Dr. G. F. Matthew describes a " reef of limestone " of pre-Cam- 

 brian age containing numerous fragments of a concretionary struc- 

 ture which he regarded as of organic origin. He says : ' 



The reef began its growth on a bottom of fine sand, now converted into a 

 quartzite rock which forms an important member of the Upper Series. There 

 the objects consist of a multitude of small, short, closely-set columns, which 

 grew tier upon tier, with, at first, more or less of sand between the tiers. 



It may be observed also that these crowded clusters of columns were often 

 cut off over considerable areas, by thin horizontal layers of mineral matter, 

 perhaps indicative of the incursion of sand or other sediment, but the growth 

 was almost immediately renewed by a new set of columns, occupying the fresh 

 surface of mud that covered the old ones 



This reef of calcareous columns was about one hundred and fifty feet 

 deep 



He compares these forms with Eozoan canadense. The mode of 

 growth also suggests Collenia occidentale and C. compacta. I hope 

 to have specimens for study in the fall of 1914 that will possibly 

 determine the origin of these problematical fossils. My present im- 

 pression is that they are of algal origin. 



Formation and locality. — " Laurentian " limestone: St. John 

 River, near St. John, New Brunswick. 



Bull. Nat. Hist. Soc, New Brunswick, No. 9, 1901, pp. 38, 39. 



