154 Cincinnati Society of Natural History 



Description of Plate III. 



Fig. 1 — Orthodesma cf . nasutum, Conrad — Right valve. 

 Railroad cut at milepost 65, one mile north of the station at Cynthi- 

 ana. 



Fig. 2 — Orthodesma cf. nasutum, Conrad — Anterior half of 

 left valve, possibly belonging to a different species than Fig. 1. 

 Railroad cut 59.1 miles from Ludlow. 



Fig. 3 — Modiolopsis rogersensis — A, B, C, three right 

 valves, casts of the interior. D, left valve, imperfect posteriorly. 



Fig. 4 — Fusispira cf. sulcata, Ulrich — Railroad cut 59.1 

 miles from Ludlow. 



Fig. 5 — Fusispira cf . sulcata, Ulrich — Possibly a different 

 species from the preceding, with flatter volutions. Railroad cut 

 59.1 miles from Ludlow. 



Fig. 6 — Byssonychia cf. byrnesi, Ulrich — Cardinal and 

 posterior outlines not distinctly indicated in the original specimen, 

 hence the identification is only provisional. Railroad cut south 

 of Rogers Gap. 



Fig. 7 — Hehertella latasulcata — A, pedicel valve ; railroad 

 cut 58.1 miles south of Ludlow. B, interior of pedicel valve, 

 showing the form of the muscular scar ; railroad cut 55.8 miles 

 south of Ludlow. 



Fig, 8 — Hormotoma terehriformis — A, cast of interior, im- 

 perfect at top, but with original length of shell indicated; from 

 railroad cut 59.7 miles south of Ludlow. B, a similar specimen 

 from the railroad cut 54.5 miles south of Ludlow. 



Fig. 9 — Lophospira — Apparently belonging to the augus- 

 tina group. Form of aperture unknown. Railroad cut 59.1 miles 

 from Ludlow. 



Fig. 10 — Lophospira sp. nov. — Railroad cut 59.1 miles south 

 of Ludlow. 



In the preceding plates the apertures of all of the gasteropoda 

 are unknown, and no attempt has been made to represent the proper 

 form of the aperture, so that no conclusions regarding the aper- 

 ture should be drawn from the illustrations presented. 



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