GEOLOGIC DISTRIBUTION 43 



size of the chambers, .01 mm. in diameter, is much smaller than 

 the microspheric proloculum of known forms and there is 

 nothing about the specimens as figured to suggest foraminifera 

 as much as yeast cells or many other microscopic objects. Dawson 

 figures very similar objects which occur in great numbers in 

 association with Eozoon, often apparently occurring in the 

 chambers of that form. These he designates as Archaeosphaer- 

 inae. His figures and description certainly indicate a very close 

 relationship to Eozoon, a form which has long since lost its claim 

 to be considered as belonging to the foraminifera. The very 

 close similarity of Dawson's and Cayeux's figures would seem 

 to indicate a similar source for the two sets of objects and that 

 neither can have any valid claim as foraminifera. 



Matthew records from the Cambrian of New Brunswick both 

 Orbulina and Globigerina, giving several specific names under 

 both genera. I have examined specimens of both genera as 

 named by Matthew in his collections but have been unable to 

 make out anything of true foraminiferal nature in either. They 

 very strongly resemble minute concretions. The so-called 

 Orbulinas are merely small globular bodies and the so-called 

 Globigerinas aggregates of these in various groupings. That they 

 are in any sense related to the highly specialized and much later 

 appearing genera to which they are assigned is hardly tenable or 

 in my own mind, from the material I have studied, that they are 

 foraminifera at all is equally questionable. 



There are however in the Cambrian other evidences which are 

 much more convincing. Chapman has recorded from the 

 Cambrian of the Malverns in England well distinguished 

 foraminifera which he refers to the genera Lagena, Nodosaria, 

 Marginulina, CristeUaria, and SpirilUna. These are rather 

 abundant especially the Spirillina and so well preserved that they 

 show the tubules of the wall of the test. There may possibly be 

 some question as to the generic names to be used but no question 

 as to the foraminiferal nature of the tests. From the Cambrian 

 of Russia, Ehrenberg records numerous casts which are referred 

 to Verneuilina, Boliviria, Nodosaria, PulvinuUna, and Rotalia. 

 These might equally well be casts of Verneuilina, Textularia, 

 Nodosinella or Reophax, and Trochammina. The originals show 

 very little. Brady records Lagena from the Silurian which, 

 however, may be Archaelagena. Terquem describes four species 



