94 BULLETIN OF THE LABORATORIES 



tion of the ridge which bounds the angular furrow. The septa are or- 

 namented along their margins by delicate granulations." 



Mr. Meek's figure and description, being drawn from a very im- 

 perfect specimen, add nothing to the above and hardly serve to iden- 

 tify the species. The specimen figured upon Plate VI, is from the 

 lowest horizon, coming from the same bed as Spirifer marionensis. It 

 is remarkable for the slight angle at which the sides converge toward 

 the apex and the strictly quadrangular section. One face measures 15 

 mm. transversely, the other 12 mm. at the aperture, which shows the 

 presence of deep sinus at the angles, while the faces from the inclined 

 flaps long since indicated as a character of the genus. The angle 

 made by the sides is less than 10°. There are twelve transverse striae 

 in one centimeter or about 15 in half an inch near the aperture. 

 These striae exhibit distinct pearling upon their summits, the minute 

 pustules being rather distant from each other. The length may have 

 been three or four inches unless more rapidly tapering above. 



Other specimens from the shale below congl. I, are apparently 

 identical. In the free stone the same species appears, though our 

 specimens indicate a more obtuse spire and are not in a condition to 

 exhibit the ornamentation. In the shale below congl. II, specimens 

 of larger size but similar characters occur. Finally, small specimens 

 from the Cuyahoga shale are decidedly of the same type Neither do 

 we know how to distinguish the form found in the lower shales of the 

 coal-measures, though the crenulations have not been seen. Nore of 

 these show any traces of the barred longitudinal markings of C. byblis, 

 W., C.missouriensis, as identified by Meek and Worthen, has coarser 

 and more distant striae. 



Conitlaria micronema, Meek. 

 fPlate II, Fig. 19.) 



" Shell elongate-pyramidal, with the sides equally diverging from 

 the apex with an angle of about sixteen degrees ; lateral surfaces near- 

 ly flat, and without any mesial furrow [sic] but sometimes showing a 

 very faint, slender mesial ridge, which becomes nearly or quite obso- 

 lete toward the smaller end ; each of the four angles a little rounded 

 and provided with a shallow, moderately distinct longitudinal furrow. 

 Surface with numerous extremely small, closely crowded transverse 



