52 The Paleontologist. \^Sept. 12. 



Prof. N. says: "There are no small interstitial corallites of any kind" 

 in the latter, whilst in sp. zvelchi a moderate number are shown. And 

 there are other features in which they differ more or less, particularly 

 the upper projections of many specimens. 



The largest example used for this description is nearly 3 inches in 

 diameter across the base, others vary in, size from that down -to 3^ an 

 inch; the broken off projections above are many sizes and forms — sub- 

 cylindrical, lobate, flattened expansions and amorphous — from l^ of an 

 inch to one inch or moi'e in diameter, or across. 



Named in honor of Dr. L. B. Welch, of Wilmington, Ohio. 



Found in Cincinnati, at from about 100 to 250 feet above low-water 

 mark of the Ohio river. 



MoNTicuLiPORA {Mofiotrypa ?) subfusiformis, sp. nov. James. 



Corallum cylindrical ; generally straight, but curved in some cases ; 

 subfusiform in outline, different examples varying considerably in shape, 

 some being quite sharply pointed at both ends, others at one end only, 

 the opposite end being blunt and abruptly rounded ; some have a slight 

 projection at one end, but wilike a base, the cells extending over every 

 part. Specimens collected vary in size from one fourth of an inch to 

 nearly an inch in length, and from one half a line to one and a half lines 

 in diameter at the thickest part. Calices oval or subcircular, 10 or 12 in 

 the space of one line, without any regular arrangement ; cell walls toler- 

 ably thick. 



In tangential section the corallites are seen to be more or less poly- 

 gonal, and distinctly separated, the spaces occupied by fine lines passing 

 between the tubes which are filled with an opaque substance. 



A longitudinal section, cut through the center, shows the cell walls in 

 the axial portion as very thin, somewhat tortuous, and seemingly con- 

 tused, until nearing the surface, where the tubes become more distinct, 

 and curve either directly or somewhat obliquely to the surface. In the 

 central part no tabulae observed, but the vertical tubes nearer the surface 

 are closely, but faintly tabulate. In a transverse section the delicate 

 cell walls of the e e ntral ^ox\Xon have a chain-like reticulated appearance. 



This singular little species the writer found in the upper part of the 

 Cincinnati Group, in Clinton and Warren counties, Ohio. 



MoNTicuLiPORA {Moiiotrypci) dychei, sp. nov. James. 



The corallum of the type specimen of this species is subfusiform in 

 general outline, with rough, nodular swellings, and low, compressed 

 ridges, and annular constrictions : parasitic a crinoid stem the central, 

 or subcentral object, upon and around which it is grown: tapering at 

 each end to a little more than the size of the stem — about three eighths 

 of an inch at one end, and one fourth of an inch at the other. When 

 found the specimen was broken into five pieces, exhibiting clearly the 

 parasitic habit, the stem seen as passing entirely through, from end to 



