so PALEONTOLOGY OF NEW YORK. 



LICHENALIA, Hall. 1852. 



LiCHENALIA CRASSA. 



PLATE XI, FIGS. 21, 22. 



Trematapora cratta. Hall. Thirty-second Rept. N. Y. State Mils. Nat. Hist., p. 152. 1879. 



Report of State Geologist for 1SS2. Expl. pi. 11, figs. 21, 22. 1883. 

 Not F%ttnlipora rrasta, RoMiN<iBK. 



ZoAKiuM hollow, or expLanate. Thickness of specimens observed about 1 

 nun. Cell apertures circular, diameter .25 mm., quite regularly separated 

 from each other by a .space equal to half the diameter of an aperture, form- 

 ing somewhat irregular intersecting rows. Surface marked by numerous small 

 acellular maculae, the centers of which are distant from each other two or 

 three mm. Interapertural space smooth. Intercellular space occupied by 

 minute septate tubuli, except near the base of the cells, where the space is 

 occupied by irregularly arranged vesicles ; from one to three series of tubuli 

 between adjacent cells; from eight to ten septa in the space of one mm. 



This species may be distinguished by its closely arranged cell apertures, 

 absence of mesopores, and the numerous acellular maculae. It resembles 

 specimens of Fistulipora ponderosa which have been worn or macerated, but that 

 species has mesopores and larger cell apertures, and is without acellular maculae. 



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



LiCHENALIA MACULOSA. 



PLATE XIV, FIGS. 1-8. 



JYematopora ponderosa. Hall. Twenty-sixth Re])t. N. Y. State Mus. Nat. Hist., p. 126. 1874. 



" inaculom, " Twenty-sixth Rept. N. Y. State Mus. Nat. Hist., p. 106. 1874 



CaUvpora inaaUoga, Hall. Thirty-second Rept. N. Y. State Mus. Nat. Hist , p. 156. 1879. 



" " Report of State Geologist for 1882. Expl. pi. 14, figs. 1-8. 1883. 



ZoARiDM explanate, generally of irregular growth, frequently much contorted ; 

 often massive from the superimposition of successive layers of growth. Thick- 

 of bryozoum varying from 1 to 8 mm. Under surface consisting of a strongly 

 wrinkled epitheca. Cells tubular, sub-cylindrical, arising from the epitheca 

 at right angles to the surface ; walls moderately thick. Septa thin and 



