10(> Twenty-sixth Report on the State Museum. 



Formation and locality. — In the shaly limestones of the Lower 

 Helderberg group, at Catskill creek, Greene county, New York. 



Teematopoka pondeeosa n. sp. 

 Bryozoum growing in heavy masses, consisting of lamellar accre- 

 tions ; surface structure consisting of comparatively large pores, 

 distant from each other about their own diameter ; margins of pores 

 elevated, often extending over and constricting their apertures, espe- 

 cially on the posterior margin, and forming elevated hood-like pro- 

 jections. Intercellular area depressed or channeled, but destitute of 

 pits or other markings. Under-surface of the lamellae with radiating 

 striae, and marked by strong concentric wrinkles. In vertical section 

 the intercellular substance is seen to be strongly vescicular, the par- 

 titions dome-shaped, and the cell tubes with frequent constrictions. 



Formation and locality. — In the shaly limestones of the Lower 

 Helderberg group, at Catskill creek, Greene county, New York. 



Teematopoea maculosa n. sp. 

 Bryozoum growing in irregular foliate or incrusting masses; cells 

 approximate with depressed spaces between ; apertures hooded in 

 some stages of growth. Surface of frond studded with numerous 

 comparatively large maculae on which the cells are more sparsely 

 arranged. Intercellular tissue strongly vesiculose seen in a vertical 

 section. Under surface of frond strongly corrugated. 



This species .differs from T. ponder osa in the spots on the sur- 

 face, in the mode of growth (in distorted or explanate fronds), and in 

 the more strongly corrugated epithecal crust of the inferior surface. 



Formation ojnd locality. — In shaly limestone of the Lower Hel- 

 derberg group, on Catskill creek, Greene county ; and near Hudson, 

 New York. 



Teematopoea eegulaeis n. sp. 

 Bryozoum forming very slender, solid branches, with frequent, 

 widely-diverging bifurcations; diameter of branches seldom more 

 than three-hundredths of an inch. Cells elongate-oval, in longitudi- 

 nal rows and in quincunx order, between the rows of cells the space 

 is often elevated into a longitudinal ridge, with finely serrated crest 

 in well-preserved specimens. 



This species is often abundant on the surface of weathered slabs. 

 The slender branches and regular arrangement of cells distinguish 

 it ; while the ridges are frequently worn away leaving a smooth 



