70 Forty-fourth Report on the State Museum. 



This species may be distinguished from P. intercella by the 

 smaller ordinary cells, latger cells on monticules and the absence 

 of interstitial cells ; from P. reticulata by the absence of interstitial 

 cells ; from P. pertenuis by the more decidedly angular cell 

 apertures and the absence of interstitial cells ; from P. amplectens 

 by the larger cells ; from P. incrustans of the Lower Helderberg 

 group by the cells on the monticules being larger than the others. 



Formation and locality. — Hamilton group, York, Livingston 

 county, N. Y. 



Palescliara amplectens. 



Paleschara amxAectens, Hall. Trans. Albany Institute, vol. x, p. 179, 1881. 



Keport of State Geologist for 1883, p. 7, 1884. 

 " " " Palaeontology of New York, vol. vi, p. 237. 



Not figured, 1887. 



Zoarium consisting of extremely thin foliaceous expansions 

 incrusting other fossil bodies, especially crinoid columns ; great- 

 est thickness observed less than .25 mm. Cells polygonal, vary- 

 ing from quadrangular to hexagonal, in contact ; diameter .20 mm., 

 sometimes irregularly disposed ; at other times forming oblique 

 intersecting rows, giving to the surface a regularly reticulated 

 appearance ; the margins of th^ cell walls have frequently minute 

 nodes or spinules at the angles ; sometimes they occur on other 

 portions of the margins. The surface is not marked by maculae 

 or monticules ; the cells being of uniform size. 



This species may be distinguished from any other of this 

 geological formation by the smaller size of the cells, and the 

 absence of maculae or monticules. 



* Formation and locality, — Hamilton group, shore of Seneca 

 lake, N. Y. 



Stictopora rectalinea. 



Stictopora rectalinea, Hall. Palaeontology of New York, vol. vi, p. 245, 



pi. Ixiii, fig. 23, 1887. 

 * -x- -^ * * -Jf ** * 



This species in its general appearance most nearly resembles 

 S. C7'escens and S. rigida of the Upper Helderberg group ; from 

 the former it may be distinguished by the smaller, more distant 



