138 Cincmnati Society of Natural History 



end, with the probability of two more at the very tip, making a 

 total of at least nine whorls, and probably even eleven whorls in 

 a length of about 120 mm., taking into account the space probably 

 occupied by the aperture. The later whorls do not overlap the 

 base of the earlier whorls as in Fusispira. The largest well pre- 

 served whorl, next the body whorl, has a width of 26 mm. and 

 a vertical height of 20 mm. Where the width of the shell is 15 

 mm., the vertical height of the whorl is nearly 11 mm. Although 

 the shell was fairly thick at the sutures, there is no evidence that 

 it was of more than ordinary thickness elsewhere. The interior 

 casts of the whorls are fairly evenly convex. Other specimens 

 having the same form occur at the railroad cuts 59.1, 57.4, and 

 54.5 miles south of Ludlow. 



At 59.1 a specimen was found whose lower whorl was slightly 

 angulate along the lower side, where it curved into the suture. 

 Although this may belong to the same species as the preceding, 

 there is a bare possibility of it belonging to the same division of 

 the genus Lophospira as the Trenton species Lophospira augiistma. 

 It is represented by Fig. 9 on plate III. 



33 — Lophospira sp. (Plate III, Fig. 10) — A small Lopho- 

 spira, apparently an undescribed species, with a maximum 

 height of 20 to 23 mm. is rather common at the railroad cut 59.1 

 miles from Ludlow. The feature which distinguishes this form 

 from Lophospira ahnormis, Ulrich, described from strata below the 

 Fulton layer at Covington, opposite Cincinnati, is the presence of 

 a revolving ridge or carina a short distance below the suture. The 

 slope between this carina and the well marked peripheral angle is 

 only moderately concave. There is rather indistinct evidence also 

 of the presence of a carina on the lower slope of the last whorl, 

 so placed as to be hidden by the line of suture of the enlarging 

 shell. Since the lines of growth or surface striae are not preserved, 

 the form of the sinus can not be determined, so that the exact 

 affinities of the species can not be determined. Moreover, no bor- 

 dering lines can be detected along the peripheral angle. The slope 

 between the sub-sutural carina and this peripheral angle is only 

 moderately concave. A vertical section somewhat resembles that 



34 



