ROGERS : NEW BRYOZOAXS. 3 



arranged in diagonal series, about fonr in 1 mm. Between the cell 

 ranges obscure longitudinal ridges often occur. 



Position and locality: Upper Coal Measures; Lawrence, Kan., and 

 Kansas City, Mo. Type in author's collection. 



C. carhonaria Meek has from seven to nine longitudinal rows of 

 apertures. 



Vyntodii-tiin (ffrfsff. n. sp. Plate III, figs. 5-5d. 



Zoarium a long, more or less tlattened, dicliotomously dividing stem. 

 Stem acutely elliptical to subcircular in cross-section, 0.8 to 1.1 mm. 

 wide, and 0.(3 to 1 mm. thick. Zoecia in four alternating ranges. Ap- 

 ertures rather large, subcircular, probably pustuliform, with a fairly 

 well-developed lunarium seen in sections. Eight or nine apertures 

 occur in a space of 5 mm. In breaking the rock in which they occur, 

 the stems divide along their median plane into two parts or halves, 

 each of which was at first mistaken for the complete zoarium. The 

 poriferous side of the hemibranch adheres to the rock, and its char- 

 acters can only be judged by thin sections. The non-poriferous sur- 

 face is flat and occupied by longitudinal striations and by concentric 

 undulations, the latter being similar to those on Chainodictyon Foerste. 

 The non-poriferous margins of this surface are rather wide. 



Position and locality : Upper Coal Measures ; Kansas City, Mo. 

 Type in author's collection. 



Differs from the jDreceding species in having the margins of the 



branches ec^ual and in dividing along the median planes of the 



branches. 



RHABDOMESODONTID.E Vine. 



StrehIotri/jt(f tilric/u', n. sp. Plate I, figs. 3, 3^/. 



Zoarium a long, slender, cylindrical stem, 0.8 to 1 mm. in diameter, 

 dicliotomously dividing at varying intervals. Zoecial tubes long, al- 

 most vertical in the middle of the axial region, approaching the sur- 

 face gradually, and increasing slightly in size at the same time. No 

 inferior hemi septa were observed. Zoecial apertures ovate, surrounded 

 by a thin peristome, highest at the anterior border. Arranged in al- 

 ternate longitudinal rows between thin, slightly undulating ridges 

 which unite with the peristomes and are about 0.15 mm. apart. Inter- 

 apertural spaces slightly depressed, and occupied by the mouths of 

 from four to eight small pores arranged in two rows. The typical 

 number of meso^Dores is six. Measuring longitudinally, eleven ajjer- 

 tures occur in a space of 5 mm.; diagonally, four in 1 mm. It requires 

 about twelve rows to encircle the stem. 



Position and locality : Upper Coal Measures ; Lawrence, Scranton, 

 Topeka, Cottonwood Falls, and ten miles north of Manhattan, Kan. ; 

 also in the Permian at Grrand Summit, Kan. Type in University of 

 Kansas Museum. 



