ORDER IIL SILICISPONGIAE—LITHISTIDA 53 
Jereica, Zitt. (Fig. 66). Sponge cylindrical, turbinate, pyriform, or club- 
shaped, with short peduncle. Summit truncated or with shallow depression, 
perforated by the postica of vertical excurrent canals. Exterior perforated by 

Cnemidiastrum stellatum, Goldf. sp. Upper Jurassic Spongiten- Meo (Ee 
kalk ; Hossingen, Wiirttemberg. a Sponge, }/5 natural size; b, Ver- Skeleton of Jereica polystoma, 
tical tangential section, showing radial canals in vertical clefts ; Roem.sp. Upper Cretaceous; Ahlten, 
c, Skeletal elements, 60/. Hanover. 69/). 
ostia of the finer radial incurrent canals. Skeletal elements root-like, bent, 
irregularly branching, with numerous short lateral processes. Upper Cretaceous. 
J. polystoma, Roem. sp.; J. punctata, Goldf. sp. 
Chenendopora, Lamx. (Fig. 67). Goblet-, funnel-, or bowl-shaped, with 

Fic. 67. Fic. 68. 
Chenendopora fungiformis, Lamx. Senonian; Verruculina auriformis, Roem. sp. Quadraten- 
Chatellerault, Touraine. 1/3 natural size. kreide ; Linden, near Hanover. 2/3 naturaltsize. 
peduncle. Cloaca deep, perforated by postica of fine canals. Skeletal 
elements numerously branched, and containing branching axial canal. Upper 
Cretaceous. 
Verruculina, 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. 
