30 Cincinnati Society of Natural History. 



Stellipora, Hall. Pakx^ont. N. York, I, 79, 1847. Ulrich, 

 Jour. Cin. S. N. H. V, 155, VI, 265. 



Corallum dendroid or incrusting, with the branches cylindri- 

 cal, flattened or more or less frondose. Surface with more or less 

 conspicuous star-shaped, depressed maculae made up of small 

 tubes surrounded by a variable number, (8 to 20) ridges, radiating 

 outwards and carrying large tubes; occasionally nearly smooth. 

 Calices oval or circular, with thick walls. 



Obs. — Stcllipora is an obvious synonym of Co/istcllaria, hav- 

 ing been described a year later. 



54. — M. (CONSTELLARIA ) POLYSTOMELLA, Nicholson. 



Constellaria polystoiuclla, Nich. Pal. Ohio, 11, 215, 1875. 

 Whitfield Geol. of Wis. IV. 257, 1882. 



C. anihcloidea, Nich. {non Hall) Pal. Ohio, H, 214, 1875. 

 Edw. & H. {non Hall) Pol. Foss. des Terr. Pal, 279, 1851: U. 

 P. James, The Palasont. 13, 1878: Nicholson, Ann. Nat. Hist, 

 ser. 4, XVHI, 92, 1876: Pal. Tab. Cor. 301, 1879. 



C. florida, Ulrich. Jour. Cin. S. Nat. Hist., V, 257, 18S2; 

 VI, 267, 1883. 



var. promiiuDis, Ul. Ibid, VI, 269. 

 \ 3.x. plana, Ul. Ibid, VI, 269 



Stellipora limitaris, Ul. Ibid, II, 126, 1879. 



Constellaria limitaris, Ul. Ibid, VI, 269, 1883. 



Cfischeri, Ul. Ibid, VI. 270, 1883. 



Corallum forming palmate or sub-lobate, flattened expansions, 

 or cylindrical stems, varying in height and thickness : generally from 

 one and one-half lines to two lines thick, and composed of coral- 

 lites radiating from an imaginary central plane in all directions to 

 surface. Surface with numerous stellate areas, one line apart, 

 consisting of a depressed central space, surrounded by from six to 

 fourteen or more prominent and radiating ridges. Corallites of two 

 kinds : the larger oval or circular, occupying the general surface of 

 the corallum, and found especially on the ridges of the star-shaped 

 monticules: smaller ones occupying inter-spaces between the larger 

 ones, and especially the central depressed areas. 



Obs. The var. prominans of C. florida, as above, is said lo 

 be chiefly characterized by its large and prominent monticules, 

 while \3.r. plana has a nearly smooth surface. The various forms 

 are only variations of the type, and the remarks made by one of 

 us m 1878 describes the various features the species presents.* 



* The Pala.'ont pp i.^, 14. Somewhat changed in form. 



