OUDKll III 



SILICISPONGIAE LITHISTIDA 



Jereica, Zitt. (Fig. 66). Sponge cylindrical, turliinate, pyrifonn, or club- 

 shaped, with short peduncle. Summit truncated or with shallow depression, 

 perforated by the postica of vertical xi-urn-nt canals. Exterior perforated by 



FIG. 65. 



Cnemidiastrum stellatum, Goldf. sp. Upper Jurassic Spongiten- 

 knlk ; Hossingen, Wiirttemberg. a Sponpe, J / 2 natural size ; b, Ver- 

 tical tangential section, showing radial canals in vertical clefts; 

 e, ^keletiil elements, 60/j. 



FIG. 66. 



Skeleton of Jereica polystoma, 

 Roem.sp. Upper Cretaceous; Ahlten, 

 Hanover. *>/i. 



ostia of the finer radial incurrent canals. Skeletal elements root-like, bent, 

 irregularly branching, with numerous short lateral processes. Upper Cretaceous. 

 ./. polystoma, Roem. sp. ; /. punctata, Goldf. sp. 



Cheiu'ii<l<>i>i)r<i, Lamx. (Fig. 67). Goblet-, funnel-, or bowl-shaped, with 



Chenend<>i>omfunrjifonnis, Lamx. Senonian ; 

 Chatellerault, Touraine. 1/3 natural size. 



FIG. 68. 



Verruculina auriformis, Roem. sp. Quadi-aten- 

 kreide ; Linden, near Hanover. -/ ;t natural'size. 



peduncle. Cloaca deep, perforated by postica of fine canals. Skeletal 

 el en in its numerously branched, and containing branching axial canal. Upper 

 Cretaceous. 



Veiruculina, Zitt. (Fig. 68). Foliate-, funnel-, ear-, or bowl-shaped, short- 

 stemmed or sessile. Ostia on the upper surface surrounded by slight, collar-like 

 elevations. Middle (Gault) and Upper Cretaceous. 



