PLA TE XI. 



PAGE 



Fig. 1. Prasopora nodosa, n. sp. Profile view of an example of this 



species, 245 



la. Longitudinal section of same, enlarged 18 times. 

 lb. Transverse section of same, equally magnified. 



Fig. 2a. Diplotrypa milleri, n. sp. Transverse section cutting the tubes 



just below the surface, magnified 18 diameters, .... 245 



2. A portion of the preceding enlarged 50 diameters, so as to show the 

 distinct wall which surrounds both sets of tubes. In the plate 

 this figure is erroneously marked 2c. 



2b. A transverse section taken at a lower level, enlarged 18 times. 



2c. A longitudinal section, magnified 18 diameters. 



Fig. 3. Monotrypella JDQTJALls, n. sp. Tangential section of same, en- 

 larged 18 diameters, 247 



3a. Longitudinal section, magnified 18 diameters. 

 3b. Surface of same, also enlarged 18 times. 



Fig. 4. Monotrypella subqeadrata, n. sp. The surface of a branch, 



enlarged to 18 diameters, 249 



4a. Tangential section, equally magnified, 



4b. Longitudinal section, showing two of the small or interstitial tubes, 

 magnified IS diameters. 



Fig. 5. Amplexopora cingtjlata, n. sp. Surface enlarged 18 diameters, 

 showing the spiniform tubuli, and in the lower part a portion of 



one of the clusters of large cells, . . ■ 254 



5a. Tangential section of same, equally enlarged. 



5b. A portion of oa. enlarged to 40 diameters, showing the secondary 

 deposit within the tubes, and the arrangement of the spiniform 

 tubuli. 



5c. A portion of a longitudinal section representing the tubes in the 

 peripheral or " mature" region of the zoarium. This section 

 shows several of the funnel-shaped diaphragms. The thinnest 

 wall observed is represented at the bottom of the figure. 



Fig. 6. Callopora ELEGANTELA, Hall. Tangential section showing oper- 



cula in three of the ceils, enlarged 18 diameters, . . . . 250 

 6a. Longitudinal section of same, magnified 18 diameters. 

 66. Represents, equally enlarged, the tubes in the axial region of a trans- 

 verse section. 



Fig. 7. Callopora sebplana, n. sp. The surface magnified 18 diameters. 



At the bottom is shown one of the large cells, . . . 253 

 7a. A tangential section, also enlarged 18 times. 



7b. An equally enlarged longtiudinal section, showing the tubes in the 

 peripheral portion of the zoarium. 



