150 Cincinnati Society of Natural History 



Description of Plate I, Continued. 



Fig. 9 — Strophomena higginsportensis, Foerste — Interior of 

 pedicel valve. Railroad cut 59.1 miles from Ludlow. 



Fig. 10 — Lichenocrinus subaequalis — Two basal attachment 

 discs with traces of the lower part of the column. Railroad cut 

 59.8 miles from Ludlow. 



Fig. 11 — Orthodesma cf. subnasutum, Meek and Worthen — 

 Railroad cut 59.1 miles from Ludlow. 



Fig. 12 — Cyclonema varicosum-cincinnatense, Miller — Rail- 

 road cut 59.1 miles from Ludlow. 



Fig. 13 — Isotelus benjamini — Free cheek; spine of large 

 specimen, with anterior part not exposed at the time the figure 

 was prepared. Recent cleaning shows that the facial suture curves 

 very gradually forward until near the border of the cephalon. 

 Railroad cut 54.5 miles from Ludlow. 



Fig. 14 — Calymene sp. — A, enrolled specimen showing head 

 with acute genal spines ; north of Rogers Gap. B, central part of 

 head ; north of Rogers Gap. 



Fig. 15 ^ Byssonychia vera, Ulrich — Posterior outline not 

 preserved, but inferred from direction of growth lines. Railroad 

 cut south of Rogers Gap. 



Fig. 16 — Comilaria trentonensis-rogersensis — Two faces, 

 pressed flat. Railroad cut 59.1 miles from Ludlow. 



Fig. 17 — Orthoceras rogersensis — A, specimen showing fine 

 longitudinal and transverse striae ; railroad cut 59.7 miles from 

 Ludlow. B, specimen showing siphuncle along part of its length; 

 the lateral outline is supplied in the drawing from other specimens 

 in which it is distinctly preserved ; railroad cut 59.7 miles from 

 Ludlow. 



Fig. 18 — Dalmanites achates, Billings — Railroad cut 54.8 

 miles from Ludlow. Cephalon preserving long genal spine ; im- 

 pression of lower surface of the parts presented. 



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