104 



THE MICROSCOPE AND ITS KEVELATIONS. 



PLATE XVII, 



FIG. 1. 



STRUCTURK OP KOZOON CANADKNSE (Original). 



Fig. 1. Portion of its calcareous Shell, as it would appear if the Serpentine Jthat fills its cham- 

 bers were dissolved away : A 1 , A 1 , chambers of lower story, opening into each other at a, a, but 

 occasionally separated by a septum 6, 6 ; A 2 , A 2 , chambers of upper story ; B, u, proper walls of the 

 chambers, formed of a finely-tubular or nummuline substance; c, c, intermediate skeleton, occa- 

 sionally traversed by large stolon-passages, D, connecting the chambers of different stories, and 

 penetrated by the arborescent systems of canals E, E, E. 



2. Decalcified portion showing the Serpentinous internal cast of the chambers, canals, and 

 tubuli of the original; presenting an exact model of the animal substance which originally filled 

 them. 



