554 Report of the State Geologist. 



manner around a very minute axial tube; apertures elongate 

 oval, with a very thin, equally elevated peristome ; disposed in 

 longitudinal series, separated hy smooth or granulose ridges." 



Family Chilotrypidae. 

 Chilotryp^, Ulrich. 

 (Jour. Cin. Soc. ISTat. Hist., Yol. VII, p. 49. 188i.) 

 Type, Chilotryjpa hispid a ^ Ulrich. 



(Plate 21, figs. 1, 2.) 



Zoarium ramose, branches cylindrical; cells tubular, arising 

 from a small axial tube and curving to the surface ; apertures 

 oval, oblique to the surface, the lower portion of the peristome 

 being the most strongly elevated; frequently arranged in diag- 

 onally intersecting rows; interapertural space solid ; intercellular 

 space vesiculose; vesicles comparatively large and irregularly 

 disposed. 



Family Fistuliporinidae. 



The forms comprised in this family consist of explanate fronds, 

 free or incrusting, globular or semiglobular masses, occasion- 

 ally ramose, with hollow branches; cells tubular, cylindrical, 

 arising from a base consisting of a wrinkled epitheca ; cell walls 

 smooth, entire ; intercellular space occupied by vesicular tissue, 

 or tabulate mesopores, serving as a support to the slender cell 

 tubes. 



Some of the forms have hitherto been included in the family 

 FisTULiPOEiD^, but they differ from the forms properly included 

 in that family by the entire absence of pseudosepta, a difference 

 in the cell structure which must be accompanied by a correspond- 

 ing difference in the structure of the animal. The following 

 genera are included in this family: Ccelooatjlis, Fistulipobina, 



LlOHEtTOTEVPA, PiNAOOTBYPA. 



CcELocATJLis, Hall. 

 (Pal. K Y., Vol. YI, p. 23. 1887.) 

 Type, Codocaulis venustayl3i2iM. 



(Plate 21, figs. 3-5.) 

 Zoarium ramose, hollow, inner surface a thin epitheca with 

 transverse wrinkles, and fine longitudinal stria tions; cells tubu- 



