PLATE II. 



Fig. 1. Large spicule of Z/2/sotcfineZZapereZegraiis preserved as pyrite. X 30. 



Fig. 2. Diagram representing the spicular structure of Hindia sphceroidalis 

 (after Rauff). 



Fig. 3. Outline of Lysactinella Gehhardi. Section taken near the center. 



Natural size. 

 Fig. 4. Gastral surface of the pyritized specimen of ReceptacuUtes infundi^ 



buliformis. X 8. 

 Fig. 5. Ends of radial tubes in the same specimen. The tubes are embedded 



in a white, crystalline mineral which fills the intermural cavity. The 



fracture is just below the gastral or inner wall. X 26. 

 Fig. 6. Portion of the gastral surface much enlarged. X 26. 

 Figs. 7, 8. Two views of a specimen of Duncanella rudis, showing the usual 



characters of the species. X 8. 



