214 SYSTEMATIC PALEONTOLOGY 



Occurrence. CHAMBERSBURG LIMESTONE (Nidulites bed). Wilson, 

 Maryland. Stones River-Bichmond at many localities in the United 

 States and Canada. 



Collections. Maryland Geological Survey, U. S. National Museum. 



Genus BERENIGEA Lamouroux 

 BERENTCEA VESICULOSA Ulrich 



Plate LIII, Fig. 9 



Berenicea vesiculosa Ulrich, 1882, Jour. Cincinnati Soc. Nat. Hist., vol. v, 

 p. 158, pi. vi, fig. 5. 



Description. " Zoarium adnate, very delicate, growing usually upon 

 smooth crinoid columns. Cells showing distinctly upon the surface as 

 elliptical convex spaces, with the circular aperture situated upon the 

 forward slope of the same. The cells are closely arranged in rather 

 irregularly alternating series; measured along the length of the cells, 

 about eight may be counted in the space of one inch; and across their 

 width 11 or 12 occupy the same space." Ulrich, 1882. 



Occurrence. MARTINSBURG SHALE (Eden division). Jordans Knob, 

 one and one-half miles northeast of Fort London, Pennsylvania. Eden 

 shale of the Ohio Valley. 



Collections. Maryland Geological Survey, U. S. National Museum. 



. ' order TREPOSTOMATA 



Family MONTICULIPORIDAE 



Genus ORBIGNYELLA Ulrich and Bassler 



ORBIGNYELLA WETHERBYI (Ulrich) 



Plate X.LII, Figs. 7, 8 



Monticulipora wetherbyi Ulrich, 1882, Jour. Cincinnati Soc. Nat. Hist., vol. v, 



p. 239, pi. 10, figs. 4-4b. 

 Monticulipora wether'byi Ulrich, 1893, Geol. Minnesota, vol. iii, p. 218; pi. xv, 



figs. 7, 8. 



Description. Zoarium attached, forming thin crusts or small de- 

 pressed conical masses with slightly monticulose, or smooth surfaces. 

 Zocecia polygonal, with very thin walls, those of the ordinary size with a 



