72 Forty-fourth Report on the State Museum, 



ridges ; from the other species, at present known, it may be dis- 

 tinguished by minute, circular pustuliform cell apertures. 



Formatioyi and locality. — Hamilton group, Moscow, Livingston 

 county, N. T. 



Stictopora striata. 



Stictopora striata, Hall. Paleeontology of New York, vol. vi, p. 246, pi. 



Ixiii, fig. 22, 1887. 



This species most closely resembles some forms of S. tumulosa, 

 but the aperatures are larger, nut so decidedly circular, much less 

 pustuliform ; the peristomes are stronger, and the striae are 

 shorter, broader, and much more numerous ; from S. trilineata it 

 may be distinguished by the more nearly circular, more oblique, 

 less regularly disposed cell apertures, and the short tortuous 

 striae ; from S. inter striata by its more nearly circular cell aper- 

 tures, the stronger peristomes, the absence of spiniform projec- 

 tions from the interior of the cell tube, the fewer, stronger and 

 much more tortuous striations ; from S. sinuosa by the broader 

 frond, the more frequent cell apertures, more prominent peris- 

 tomes, the slighter and much more frequent longitudinal striations ; 

 from S. granifera by the nearly parallel margins of the frond, much 

 fewer striations, and the absence of nodes on the peristomes and 

 striations ; from S. incisurata by its numerous striations ; from 

 any other species at present known from the Lower and Upper 

 Helderberg and Hamilton groups, by the numerous, short, tortu- 

 ous striations. 



Formation and locality. — 5amilton group, Ontario county, N. T. 



Stictopora sinuosa. 



stictopora sinuosa, Hall. Trans. Albany Institute, vol. x, p. 190, 1881. 



" *' Report of State Geologist for 1883, p. 42, 1884. 



*' " " Palaeontology of New York, vol. vi, p. 247, pi. Ixi, 



fig. 17, 1887. 



This species may be distinguished from S, incisurata by its 

 narrower form, more rigid appearance, and the sinuous inter-, 

 rupted striations or ridges ; from S. trilineata by the more rigid 

 form, broadly oval oblique cell apertures, and the sinuous, inter- 

 rupted ridges or striations; from S. tumulosa by the broadly 



