176 Cincinnati Society of Natural History. 



ing the calices, and the much more robust habit of growth, 

 generally. 



Formation and Locality. Lower Silurian, Cincinnati Group, 

 Cincinnati and vicinity. 



21. M. jAMESi, Nicholson. 



Monticulipora {^Hctcrotr\pa)janicsi, Nicholson. Genus Montic, 

 143, 1881. 



Chcetetes jamcsi, Nich. Quart. Jour. Geol. Soc, XXX., 506, 

 1874; Pal. Ohio, IL, 200, 1875 ; ^""- Nat. Hist. .ser. 4, XVIII., 

 89, 1876. 



Batostoiua jamcsi, Ulrich. Jour. Cin. Soc. Nat. Hist., V., 256, 

 1882; VL, 83, 1883. 



Monticulipora [Hcterotrypa) iinpUcata, Ulrich. Nicholson, 

 Genus Montic, 147, 1881. 



Chcetctes implicatus, Ul. Cat. Foss. Cin. Gr. Named, but 

 not figured or described, p. 12, 1880. 



Batostoma implicata, Nich. Ulrich, Jour. Cin. S. N. H., V., 

 256, 1882. VL, 83, 1883. 



Corallum dendroid, branching irregularly or dichotomously, 

 sometimes terminating in rounded ends, branches varying from two 

 to five lines in diameter. Surface smooth or nearly so. Calices 

 oval or rounded, sometimes indented on one or more sides, thick- 

 walled, surrounded by a ring-like wall. Litercellular spaces solid, 

 or with a variable number of small tubes, or with blunt spines, ap- 

 parently the solid apices of the interstitial cells. 



Obs. The peculiarly indented walls, the ring-like wall sur- 

 rounding the apertures, and the presence of the blunt spines are 

 the main features of this species. The ?,\)tc\^?,i>np/iiata was named 

 by Mr. Ulrich, but was described by, and credited to him by Dr. 

 Nicholson. Mr. Ulrich has complicated matters by placing Dr. 

 Nicholson's name after the species instead of his own. 



Formation and Locality: Lower Silurian, Cincinnati Group, 

 Cincinnati, Ohio. 



22. M. QUADRATA, Rominger. 



Monticulipora {Monot?ypa) guadrata, Rom. Nicholson, Genus 

 Montic, 179, 1881. 



ChcEtetes quadratus, Rom. Pro. Acad. Nat. Sci. Phila. , 115, 

 1866. 



Chcetctes rlio»ibicus, Nicholson. Quar. Jour. Geol. Soc, XXX., 

 507, 1874. Pal. of Ohio, n., 201, 1875. Ann. Nat. Hist. ser. 



