26 Ctnciniiati Society of Natural History. 



(named but not figured or described), 1871. Cat. Low. Sil. Foss. 

 2d Ed., p. I, 1875 



Lcptotrypa clavacoidca, Uh-ich. Jour. Cin. S. Nat. Hist. VI, 

 159, 1883. 



L. ininiiJia, V>\. Ibid, VI, 159, 1883. 



Corallum cyHndrical, clavate or fusiform, receiving its form 

 from the tapering ends of small species of Orthoceras, or otlier 

 cylindrical objects, to which it is generally attached by the whole 

 of tlie base. Surface either smooth or elevated into low monti- 

 cules, occupied by tubes slightly larger than the average. Calices 

 polygonal, nearly equal in size. Walls of corallites tiiin. No 

 interstitial cells. 



Obs. This species is easily recognized by its peculiar shape. 

 Sometimes the object upon which it is grown has decayed, and the 

 hollow is filled with clay, or it remains hollow. 



Formation and Locality. — Lower Silurian, Cincinnati Group, 

 Cincinnati, O. 



50. M. FU.siFORMis, Whitfield. 



ChcEtctcs fiisifor/iiis, Whitf. Ann. Rept. Geol. Sur. Wise , for 

 1877, ]). 70; Geol. of Wisconsin, IV, 248, 1882. 



Moniictilipora {Monotrypa {/') siibfusifonnis, U. P. James. The 

 Pa' aeon , 52, 1882. 



Corallum cylindrical, sub-fusiform, straight or curved, pointed 

 or blunt at one or both ends; a it"^ specimens with a projection at 

 one end, but not like a base; one-fourth of an inch to an inch long, 

 and from onedialf a line to one and one-half lines in diameter. 

 Surface smooth. Calices very small, oval or sub-circular, without 

 any regular arrangement. Intercellular spaces marked by scattered 

 pits or a depressed groove or an elevated ridge-like line. Walls of 

 cells tolerably thick. 



Obs. — Differing from J/, clavicoidea in the smaller size and ap- 

 parently free habit not incrusting shells of Orthoceras (J). 



Formation and Locality. — Lower Silurian, Hudson River 

 Group, Iron Ridge Wise. Cincinnati Group in Warren and Clin- 

 ton Counties, O. 



51. M. HosPiTALis, Nicholson. 



Mo7iticitUpora (Frasopora) sclwyiiii, var Iiospitalis, Nich. Genus 

 Montic. 209, 1881. 



Frasopora hospitalis, Ul. Jour. Cin. S. N. Hist. V, 237, 1882. 



Monticulipora {Hctcrofrypa) winc/iclli, U. P. James. The 

 Palaeon. 48, 1882. 



