660 



Report of the State Geologist. 



JS'otwithstandiag statements to the contrary, it is a fact that the 

 same species has invariably a cellulose interapertural surface or 

 a solid one. Both characters do not occur on the same species. 



FisTULiPOBELLA, nov. gcn. ^ 



Type, Fistulijporella constricta^ Hall (sp.). 



(Plate22, figs. 5-7.) 



Zoarium laminar or massive from the superposition of suc- 

 cessive layers of growth ; cells tubular ; pseudoseptate ; apertures 

 subcircular, enclosed in a sloping, polygonal, vestibular area. On 

 the interapertural surface, in addition to the vesicular cavities, 

 are small oval apertures, with equally elevated peristomes; 

 intercellular space vesiculose. 



Stkotopora, Ulrich. 



(Geol. Sur. 111., Yol. YIII, p. 383. 1890.) 



Type, Sirotoporafaveolata, Ulrich. 



" Eamose, branches large, irregular, solid or hollow ; large, 

 abruptly spreading cells, which are supposed to represent ooecia, 

 are distributed among the ordinary cell apertures. When well 

 preserved they appear on the surface as strongly convex nodes, 

 with an opening on one side. In all other respects they are like 

 Fistulipoea." 



126. 



W^dlMM- 



Fig. 126. Strotopora faveolata. Fragment, natural size and a portion of the surface of the 

 same, x9. 

 Fig. 127. '^Strotopoi-a dermata. A flattened fragment, natural size and a portion of the same, x9. 



