NEW AND LITTLE-KNOWN WAVERLY FOSSILS. ^ 45 



pressed, concave ; ear small, obtuse, convex ; surface ornamented by about 

 thirty sharp, equidistant striae, which are nearly obsolete on the wing. 

 Length, 23 mm. ; height, 10 mm, ; length of wing, about 10 mm. 



This pretty little species occurs at Cuyahoga Falls, 50 feet below the Car- 

 boniferous conglomerate. A few specimens of a similar, if not identical, 

 form were also found at Moot's run, Licking county. 



CONOCARDIUM ALTERNISTRIATUM, HERRICK. 



{Plate 1, figs, l-i.) 



Several imperfect specimens of this fine species were found by W. F. 

 Cooper at Wooster in shales 60 feet below conglomerate I. The fossiliferous 

 zone is on the same stratigraphical level as that at Moot's run, Licking 

 county, and, like that layer, is characterized by calcareous concretions fre- 

 quently filled with perfectly preserved fossils. 



The characteristics differentiating C. alternistriatum from other Waverly 

 species are chiefly the distant flat-topped ribs and distinctly bifaceted sur- 

 face. The species also attains a larger size than the others reported from 

 Ohio. Unfortunately no perfect specimens have been obtained. Among 

 the fragments of this familiar form at Wooster was found a nearly perfect 

 small individual with surface characters of C. alternistriatum. As the speci- 

 men is undistorted and retains the shell with even its original brown color 

 in places, it has been carefully figured. The chief diflference between this 

 specimen and the specimens of C. alternistriatum thus far seen is in the 

 structure of the posterior prolongation. The shell is exfoliated over this 

 region, but the cast exhibits coarse, rounded ribs very unlike the remainder 

 of the surface. In C. alternistriatum the posterior facet of the lateral surface 

 is covered with finer and more numerous plicse than the anterior, while here 

 the conditions seem reversed. Length from beaks to posterior extremity, i 

 in.; extreme length from antero-ventral to postero-dorsal extremity, J in.; 

 greatest breadth, 1-33 in. 



The species figured is in some respects like C meekamim, Hall, but seems 

 quite distinct. It is much more oblique, and is more distinctly compressed 

 posteriorly. Without definitely deciding upon its specific relations, the fig- 

 ures are given for subsequent comparison. 



Another species of Conocardium is present at the same place in the same 

 stratum, which in surface characters resembles C pulchellum. 



SPIRIFER PSEUDOLINEATUS, H. ? 

 {Plate \, fig. \%.) 



The Martinia group is very difficult, and although we have at least three 

 nominal species from the Waverly they are by no means well distinguished. 



