26 The Paleontologist. [July lO, 



Prof. Marsh, in an article describing the Genus Brachiospongia (Am. Jr. of Sci. 

 and Arts, Vol. 44, 2d series, p. 88), refers to B. digifata, Owen, and mentions 

 two other species for which he proposes the names B. Rocmerana and B. Lyo/ii, 

 and says, " A full description of these specimens with illustrations, will appear in 

 an early number of this Journal." I am unable to find these descriptions and 

 figures in any of the succeeding volumes of the Journal. 



Locahty. Dr. L. B. Welch of Wilmington, O., to whom this specimen be- 

 longs, informs me that it was found near that place, in the beded rock, near 

 " Todd's fork." a branch of the Little Miami River. Cincinnati Group. 



GENUS ZAPHRENTIS. Rafinesque. 

 ZAPHRENTIS (?) ohioensis. (sp. nov.) James. 



Corallum small, simple, expanding quite rapidly from the base upward ; 

 sharply curved about the middle ; subcylindrical ; epitheca thin ; slight encircling 

 undulations and numerous fine encircling lines crossing the small, closely set, lon- 

 gitudinal sinuous costae. Margin of cup thin, but the interior, and the septa not 

 observed owing to those features, of the examples examined, being covered with 

 rock or other corals ; the base is covered also in the same manner. 



Size about yk of an inch in diameter across the cup, and about one inch in 

 length, taking the outer curve. 



This seems to be a rare species, three specimens only being known to the 

 writer: one in Dr. R. M. Byrnes' collection and two in the writer's. 



Found at Mt. Auburn, Cincinnati. 



GENUS ORTHIS. DaUian. 

 Orthis neglecta, (sp. nov.) James. 



This shell has been placed as O. pcrvda, Conrad ; but it seems to be distinctly 

 different, compared with identified specimens of perveta from other localities. 



The shell is transversely sub-oval in outline. Cardinal line a little less than 

 the greatest breadth below, and generally sharply defined at the extremities. 

 Area sub-triangular, rather broad at the beak but very narrow at the points of 

 the hinge line. Dorsal valve, convex; beak slightly projecting and not in- 

 curved. Ventral valve a little more convex generally, than the other, with 

 a slight mesial sinus in some cases causing a slight sinuosity at the front margin; 

 beak prominent, projecting and incurved; foramen triangular. Both valves 

 covered with fine radiating strise which are increased between the umbo and 

 margin, by implantation, to three or four times their number near the beak. 

 Between the radiating strice fine transverse lines may be seen, under a magnifier, 

 giving to the striae a sort of serrated appearance on all examples noticed. 

 These transverse lines may have extended over the striae, and as they are very 

 dehcate, become weathered, or rubbed off. Specimens collected vary in size 

 from ^ to ^ of an inch in breadth. 



This species differ from O. plicatella, and O. fissicosta, Hall ; in being uni- 

 formly more nearly equal in breadth and length, and the greater number and 

 finer radiating striae. In general appearance the difference strikes the eye at 

 once. Found on the hills about Cincinnati. 



