Beede.] Carboniferous Invertebrates. 23 



AULOPORA. 



Goldfuss. Petref. Germ., p. 82, ( 1826 ). 



Aulopora? prosseri. Plate III, fig. 2; plate IV, fig. 2. 



Aulopora ? pross* ri Beede, Kans. Univ. Quart., vn, p. 18, pi. — , f. 2, 

 (1898). 



Corallum large, prostrate, bifurcating, the calyces rising ver- 

 tically or obliquely from 3 to 7 mm. or more ; average diameter 

 '2 mm. or less ; average diameter of prostrate portion a trifle 

 less. Calyces not campanulate, cylindrical,, openings nearly 

 circular ; corallites wrinkled ; weathered specimens show longi- 

 tudinal striae indicating rudimentary septa ; the corallites are 

 one to three diameters distant. In the lower portion of the 

 corallite the cavity is nearly or quite closed on account of the 

 internal thickening of the wall. Tabula 4 generally wanting, 

 occasionally present in moderate numbers and pass from wall 

 to wall, sagging regularly near the center. Size of corallum 

 unknown. Colonies twenty-two inches across were recently 

 collected in the southeastern part of Douglas county, and still 

 appear to be incomplete. The base of this species broadens rap- 

 idly, and in good specimens appears somewhat like coarse lace. 



Range and distribution : Upper Coal Measures ; Lyndon, 

 Osage county, Lecompton and near Twin Mounds, Douglas 

 county. 



In large slabs this species looks not a little like Syringopora, 

 but differs from it very markedly in the absence or sparsity of 

 tabulae and the fact that the tubes are always rather short. 



Aulopora? anna. Plate III, fig. 3. 



Auloporaf anno Beede, Kans. Univ. Quart., vn, p. 18, pi. — , f. 3, (1898). 



Corallum prostrate, diffusely branched, branches interlacing 

 and anastomosing at every contact ; walls thin, save at the base 

 of the corallite ; tubes very short, slightly subcorneal, immedi- 

 ate openings slightly flaring, circular to oval ; no tabulae dis- 

 tinguishable ; septa occasionally represented by a faint ridge in 

 the best-preserved corallites ; diameter of calyx opening, 2 mm., 

 contiguous to one or two diameters distant. Corallite low, a 

 little larger at upper extremity than at the base. 



Range and distribution : Upper Coal Measures ; Morehead. 



