CORALS AND BRYOZOA. 223 



more regularly disposed above, but not having the appearance of septate 

 tubuli. Cell apertures arched or sub-triangular, diameter .25 mm., fre- 

 quently nearly rectangular to the surface, often regularly arranged, 

 alternating and sub-imbricating, 'separated by about the diameter of an 

 aperture. The upper portion of the cell walls are exposed for .25 or .30 mm. 

 Mesopores minute, margins scarcely elevated above the surface, and having, 

 at the angles, minute nodes or granules. Surface marked by low, rounded 

 monticules, the centers of which are distant about 6 mm., having a sterile 

 space of 1.50 mm., in diameter, which is occupied by mesopores slightly larger 

 than those between the apertures. The nodes or granules frequently obscure 

 the mesopores so that the centers of the monticules and inter-apertural spaces 

 have the appearance of a solid granulose surface. 



This species may be distinguished from Lichmalia colliculata by the less 

 elevated and more distant monticules, the non-radiation of the cells on the 

 monticules, and the central sterile space ; the inter-apertural space resembles 

 that of F. serrulata, but it is easily distinguished from that species by its smaller 

 and oblique cell apertures. 



Formation and locality. Hamilton group. Western New York. 



FlSTULIPORA MINUTA (?). 



PLATE LIX, FIGS. 5-8. 



Compare FUtulipora minuta, Rominukr. Pi-oc. Acad. Nat. Sci. Phila., p. 120. May, 1866. 

 TheUUMtiffina striata. Hall. Trans. Albany Institute, vol. x, p. 186. 1881. 



Report of State Geologist for 1883, p. 28. 1884. 



ZoARiUM consisting of thin lamellate expansions, free or incrusting other 

 objects, usually Cyathophylloid corals; thickness from .50 to 1 mm.; epitheca 

 very thin, concentrically wrinkled. Cells tubular, at right angles to the 

 surface, non-septate. Intercellular tissue vesiculose, vesicles comparatively 

 large, irregularly disposed at the base, more regularly superimposed 

 above, but not forming regular septate tubuli. Cell apertures oval, fre- 

 quently obscurely sub-polygonal, length .25 mm., width generally about 

 two-thirds the length, sometimes nearly equal to it, occurring at irregular 

 intervals. Peristomes moderately strong, equally elevated, and when well 



