224 DiCTYOSPONGIDiE. 



PLATE XIII. 



BOTRYODICTYA, gen. nov. 



Page 111. 



BoTBTODicTYA RAMOSA, Lesquereux (sp.). 



Page 111. 

 Figure 1. A compressed and imperfect specimen showing the three rows of 

 compound nodes and the single row of simple nodes in the apertural 

 region. These nodes have all been much flattened and considerably 

 distorted. The pedicel is partially retained. 



Figure 2 A transverse section of a specimen showing a portion of the 

 apertural nodes in their normal extent and form. 



Figure 3. The other side of the specimen represented in figure 1. 



Figure 4. A laterally compressed specimen viewed from the base of the 

 cup, showing the outward extent of the nodes. 



Figure 5. An apical view of a guttapercha cast taken from the interior of 

 the base of the cup; showing that the vertical bands of the cup 

 converge to an apex and form a distinct internal reticular wall or 

 diaphragm at this plane. 



Figure 6. A specimen having an imusually large vase and slender pedicel. 

 This example shows the obsolescence of the prismatic faces, the 

 erect, bilobed or simple subapertural nodes and the pendulous 

 compound nodes of the lower rows. 



Figure 7. The opposite side of the same individual, only a portion of the 

 surface and lobes being exposed, more below than above. The erect 

 node at the summit is apparently a division of one of the apertural 

 nodes. 



Figure 8. The most complete individual obtained ; showing the form of the 

 cup and its nodes, and a portion of the long, smooth reticulate pedicel. 

 Chemung group. Laivrenceville, Tioga county, Pennsylvania. 



