namiUon Group* 



189 



STICTOPORA, Hall 



t 



StTCTOPORA INCISURATA, 71. sp. 



Flattened dichofcomous brandies; bifurcations infrequent, some- 

 times 30 mm. distant, width 4 mm.; greatest thickness .75 mm.; 

 width of non-celluliferous margin .35 mm., the ridges separating 

 the longitudinal ranges of apertures sometimes continuing across this 

 space, and from their extension giving a serrated appearance to the 

 margin; cells tubular, cylindrical, apertures circular or slightly oval, 

 diameter .25 mm., arranged in longitudinal rows, increasing by inter- 

 stitial addition; margins of apertures very distinct and prominent, 

 some portion of the margin bearing a denticulate projection ; ridges, 

 separating longitudinal rows of apertures, of varying appearance. 



Stictopora obliqua, n. sp. 

 Width of branches 3 mm. , non-cellular margin .25 mm., straight, 

 not indented; apertures rounded or slightly oval, diameter c25 mm., 

 arranged in longitudinal rows, which are slightly divergent ; margin 

 of lower portion of aperture more prominently elevated ; the ranges 

 of apertures separated by a distinct ridge. 



Stictopora ii^denta, ji. sp. 

 Bifurcations occurring at intervals of from 5 to 13 mm. ; width of 

 branches 6 mm. ; greatest thickness slightly more than .50 mm. ; non- 

 celluliferous portion of the margin entirely wanting or very narrow ; 

 cell apertures circular or slightly oval ; diameter .25 mm., arranged in 

 longitudinal rows from 11 to 17 rows on a branch ; 10 apertures in the 

 space of 5 mm., longitudinally; margins distinctly and usually equally 

 elevated ; sometimes there is a denticulate projection from the lower 

 or lateral portion of the margin. 



Locality — Lodi Landing, Seneca Lake, N. Y. 



Stictopora palmipes, n. sp. 

 Greatest thickness of the bryozoum .50 mm. ; celluliferous portion 

 of the branch varying from 1 to 1.50 mm. in width. The mode of 

 branching differs from that of the usual forms of Stictopora. The 

 branches are primary and secondary; the secondary branches are 

 short, not exceeding 1.50 mm. in length; the primary branches are 

 distant from each other about 3 mm.; the secondary branches 2 mm., 

 or less; width of non-celluliferous margin .80 mm.; it continues 

 around the end of the secondary branch, and from that point to the 

 secondary branch above, entirely limiting the celluliferous portions of 



