PLATE III. 



Fig. 1. A section taken from Syringospfueria monticularia, Duncan, the specimen being figured 

 on Plate I in figure 7. The section is radial, and the top represents a small monticule 

 at the surface ; the lower part is towards the centre of the body. Many tubes are 

 seen reaching to the surface and opening, some on the faintly rounded monticule, and 

 others in the depressed part. The tubes in the centre of the section are essentially part 

 of a radial congeries. At the sides there is tube reticulation and some of the endings 

 of these tubes are seen at the surface. Swellings of the tubes are seen in some places. 

 Magnified, half-inch object glass. 



,, . 2. The surface of a specimen of Syringosphteria monticularia magnified, showing on the 

 right a small pore with one large tube opening and two smaller. The dark, straight, 

 bent, and branching dark lines elsewhere are the calcite intertubular infiltration, and the 

 white or shaded spaces between them are tubes, some running, as on the left, a short 

 course and opening on the surface, others bounding the pore, and some only showing 

 geniculate portions of their track. 



3. The top and sides of a small monticule of the same specimen, less highly magnified. 



There are tube openings of the radial series in the centre, and portions of tubes, partly 

 of the radial and partly of the interradial series, covering the sides of the monticule, 

 and opening externally around the top. 



4. An oblique section near the centre of a specimen of Syringospkceria monticularia magnified. 



In the centre is what may be called a parent tube which gives off others that in turn 

 bifurcate and radiate. Those on the sides of the section are becoming interradial 

 reticulations, and are here and there irregularly swollen. Many small tubes cut across 

 are seen disconnected. The central tubes are two radial sets, and the bifurcating is 

 very characteristic. 



5. A tangential section of one of the granules of Stoliczkaria granulata magnified. The 



small radial tubes open in the midst directly, and the large interradial tubes, most 

 irregular in their outline of section, are, some of them, provided with neck-like pro- 

 longations. These are connected with the small radial series. 



6. A longitudinal section of the same specimen and through a granule. In the centre are 



a few inosculating and bifurcating small tubes, and three of them open at the surface 

 on the top of a granule, being equivalent to the central openings in figure 5. On either 

 side are large interradial tubes, two uniting with the radial series by small short neck- 

 like tubes. Magnified under quarter-inch object glass. 



7. The surface of a rugged part of the same Stoliczkaria slightly magnified. The granules 



show tube openings on them and some large tube reticulation, the dark lines being 

 intertubular weathering. 



8. A longitudinal or radial section of Syringosphtzria monticularia magnified. The depression 



is a pore, and the relation of some tubes to it is shown. Other tubes are opening out 

 at the surface close by. 



,, 9. A radial section of the same specimen showing an interradial tube reticulation opening 



at the surface and running over it, forming there a tubular series. Elsewhere the 

 irregular size of the tubes is shown and their general reticulation. 



