148 



Bryozoans of ilie 



TrEMATOPOHA annul ATA, VAR. PRONASPINA, 1U VaV. 

 Eaniose; branches infrequent, diameter two mm.; cells tubular, poly- 

 gonal, gradually diverging, diameter of aperture .25 mm. ; cell-walls 

 of the interior thin, tjiickened at the surface; cells septate; septa 

 occurring at irregular intervals ; width of aperture greater than the 

 length, subimbricaLing; at the base of each aperture a strong oblique 

 spine, which feature distinguishes it from the ordinary forms ol 

 annuhita. ^ 

 Locality — Falls of the Ohio river. 



Trematopoka alternata, n. sp. 



Eamose, solid; branches infrequent, diameter slightly more than 

 one mm.; cells tubular, cylindrical, opening directly outward; aper- 

 tures oval, length .38 mm. width two-thirds the length, margins thin, 

 scarcely elevated, arranged in longitudinal parallel rows; fifteen in the 

 space of five mm., five or six rows on a branch, apertures alternating, 

 forming oblique, transverse longitudinal rows, separated by stronjr 

 granulose ridges; at the base of each aperture is a strong conical 

 node. The most prominent feature of the surface is the longitudinal 

 ridges alternating with the rows of nodes. 



Locality — Onondaga Valley, X. Y. 



Trematopora rectilixea, n. sp. 



Eamose, solid; diameter 1.20 mm.; cells tubular, cylindrical, aper- 

 tures oval, arranged in parallel longitudinal rows, fourteen rows on a 

 branch, alternating — forming equally prominent oblique rows; space 

 between apertures equal to width of aperture; space between longi- 

 tudinal rows elevated or striated, granulose; at the base of each 

 aperture there is a strong conical node. 



Locality — Onondaga Valley, K. Y. 



Trematopora scutulata, n. sp. 



Eamose, solid ; branches occurring at intervals of from 5 to 12 mm., 

 diameter one mm.; cells tubular, apertures rhombiform, length .33, 

 width .25 mm., closely arranged in oblique parallel rows at an angle 

 of 45° to the axis of the branch, separated only by the cell-walls; the 

 margins are minutely granulose, and at each angle is a strong node. 



JjOcality — New York. 



CALLOPOEA, Hall 

 » Callopora irregularis, .^jy. 

 Eamose, hollow; diameter of branch three mm., thickness of the 

 bryozoum .55 mm. ; inner surface a wrinkled epitheca ; cells tubular, 



