10 PALAEONTOLOGY OF NEW YORK. 



than the others. Cell walls thin ; smooth or with transverse wrinkles or 

 striiB, which sometimes form indistinct nodes at the angles. Septa strong ; 

 sometimes distant from each other ; at other times quite closely arranged. 

 Mural pores minute, comparatively distant, a single series on each face of 

 the tube. 



This species is very variable in its mode of growth, sometimes occurring in 

 branching forms, with the cell tubes commencing at the centre and gradually 

 curving upward and outward to the surface ; others are in hemispherical 

 masses, with a flat base, the tubes radiating from the base to the surface ; 

 increasing by interstitial or lateral additions ; sometimes in m.asses formed of 

 successive layers, as if by interruptions in growth. It is also found encrusting 

 crinoid stems and other objects, especially the basal portion of Lepadocrinus, 

 occurring sometimes in layers of not more than 2 mm. in thickness. 



It differs from F. proximus in its smaller cell tubes, the thinner walls and the 

 frequent miiculae of large cells. 



Formation and localities. Lower Helderberg group, Schoharie, and near Clarks- 

 ville, N. Y. 



Favosites proximus. 



PLATE VU, FIGS 13-15. 



Fbvogitet proximug, Hall. Thirty-second Rept. N. Y. State Mus. Nat. Hist., p. 147. 1880. 



" " Report of State Geologist for 1883. Expl. pi. 7, figs. 13-15. 1883. 



CoRALLCM forming irregular masses, frequently by the superimposition of suc- 

 cessive layers of growth. Cell tubes pentagonal or hexagonal ; length from 

 2 to 10 mm. ; diameter from .40 to .50 mm. ; walls comparatively strong. 

 Septa of about the same thickness as the cell walls, five or more in the 

 space of 5 mm. Mural pores minute, occurring in one or two series on each 

 face of the cell tube. 



This species in general appearance is very similar to F. spharicus, but may be 

 distinguished from that species by its larger cells, thicker and smoother cell 

 walls and the absence of maculae of larger cells. 



Formation and locality. Lower Helderberg group, Schoharie, N. Y. 



