1893.] 



NEW YORK ACADEMY OF SCIENCES. 



113 



The outlines of these nodules have little regularity ; they are, 

 as a rule, tiattened in the direction of the bedding. Usually 

 they have the same distinctly marked surface as those in Zone 2, 

 but occasionally they fade out into the surrounding sandstone. 



In the accompanj'ing figures are shown some of the most 

 perfect of the small bodies in the nodules of Zone 2. The first 

 three plates represent those referred to as perhaps gemmulea 

 of SY>onges (Monadi/es), and the supposed Foraminifera. The 

 last plate contains the most distinctly outlined of the forms 

 which can be considered as sponge spicules — though some, if 

 not all, of these may be sections of broken tests of foraminifera 

 or Monadiles. In the lower part of this plate are shown the 

 shapes characteristic of the glauconite grains. 



The calcite which usually fills the interior of these bodies, and 



I Plate 2. These are probably Monadilex, Fig. 3 being the urn- 

 shaped form [M. urceiforrnis). Fig. 9 is perhaps a Foraminifer. 



Trausactions N. Y. Acad. Sci. Vol. XII. April 18. 1893. 



