532 GEOLOGY OF OHIO. 



Soldiers' Home specimen shows these lateral rows of tubercles very in- 

 distinctly. A glabella in the "Orthoceras block" from Huffman's Quarry 

 was ornamented by strong, coarse tubercles. 



Elpe Ulrichi, sp. no v. 



.Plate 37. Figs. 14 a. b. c.) 



Carapace bivalve, equivalve, the valves apparently smooth, inequi- 

 lateral, the length of the shell being greater than the height. Both 

 valves are strongly convex, this convexity culminating at a point near 

 the anterior third of the carapace, thus producing a considerable eleva- 

 tion of the valves towards this point. The upper or dorsal border is 

 straight but is infolded transversely both from the anterior and posterior 

 sides, thus producing a transverse groove in the dorsal region of the cara- 

 pace at a point almost above or slightly anterior to the umbonate eleva- 

 tion of the valves described above. The dorsal view showing this trans- 

 verse infolding and the outline of the umbonate convexity of the valves 

 is especially characteristic of the species. Length of carapace, 5.5 mm.; 

 height 4.5 mm.; thickness from valve to valve 4 mm.; the umbo or point 

 of greatest convexity lies 1.75 mm. from the anterior edge of the carapace. 

 The specimen was found in the "Orthoceras block" at Huffman's Quarry. 



Mr. E. O. Ulrich, to whom the specimen was submitted for generic 

 determination, writes that this "ostracoda is congeneric with Meek's 

 Cytliere Cincinnatensis \ Miller's C. irregularis and Ulrich's Leperditia 

 radiata. The}' are quite different from Leperditia, belonging more likely 

 to the Cyprinidac. The genus into which they must go is not fully 

 decided, Jones being of the opinion that a new genus should be estab- 

 lished for their reception, while Ulrich is of the opinion, at present, that 

 Barrande's Elpe may justly include them." 



/ Cormilites dis'ans, Hall. 



(Plate 30. Fig. 7; Plate 31 Figs 11,10.) 



This shell, as identified by us, is represented by one specimen from 

 Brown's Quarry, and one from Soldiers' Home. One of the specimens 

 from the upper shah' courses at Huffman's Quarry may belong to the 

 same species. In the upper shaly courses of the latter quarry occur a 

 considerable number of specimens, some of which equal Cornulites dis- 

 tans in size, but all of them agree in the habit of being more or less flex- 

 uous and in being attached by one side to some other object. In the 

 cases at hand these objects were Orthis elegantula, Cyclonema bilix, 

 Rhiiiopora frondosa, and Homotrypa confluens. It is evident from this 

 that it grows upon an}- object it can find. Whether, as in the case of C~ 



