372 FORAMINIFERA OF THE CRAG. 



if the structural analogy be true, we may see its Radiolarian nature beneath the 

 mask. 



Numerous minute, subglobular, pitted, white, calcareous organisms found in 

 the Calcaire Grossier of Grignon, &c, belong to the Calciferous Algas (Siphoneae 

 verticillatae), being equivalent to the calcined segments of the jointed branches of 

 Cymopolia (Corallina), &c. These and other Dactyloporoid debris were probably 

 in the mind's eye when the Explanation of Plate III was written in 1866. 



2. Dactyloporoid ? Plate III, fig. 24. 



This little hemispherical, subglobular (or beehive-shaped), reticulate body, 

 shown obliquely, measures 0*3 mm. according to the magnified figure Unfortu- 

 nately it is lost. 



It somewhat resembles the subcorneal and rounded ends of some forms of 

 Polytrypa, Dactyloporella, HaploporeUa, and Gyroporella. Hence probably its 

 presumed relationship to Dactylopora in the Explanation of Plate III (1866). 



We may also note that, excepting in its relatively small size, it may be dis- 

 tantly compared with some Polyzoa, such as Gerioporse and Dianulites. 



