The Rogers Gap Fauna of Central Kentucky 125 



calyx (Fig. 8C), it is marked by numerous close transverse lines 

 of equal size and not readily noticed except under a lens. At 

 20 mm. from the calyx certain of these lines at more or less equal 

 intervals are very slightly more prominent, and even at 30 mm. this 

 prominence remains slight. Gradually, however, they become more 

 prominent until they are readily seen by the unaided eye. At a 

 distance of 50 to 80 mm. (Fig. 8D), the small diameter of the 

 stem remains, and, among the more prominent transverse striae, 

 an alternation of stronger and weaker striae is noticed, in the 

 interval between which are the still finer striae, such as are found 

 along the upper end of the stem. Finally, the prominent trans- 

 verse lines widen as well as increase in height, and a series of al- 

 ternating larger and smaller "beads'' results, which give rise to 

 the columnals. 



4 — OJiiocriniis cwilis, sp. nov. (Plate I, Fig. 7) — At the rail- 

 road cut 59.1 miles from Ludlow, a form of Ohiocrinus, regarded 

 by Mr. Frank Springer as essentially identical with Ohiocrinus 

 lax us, from the Fairmount division of the Maysville, was found, 

 which may prove to be a distinct species. Syzygies are present 

 both among the brachials and the radials, but no special signifi- 

 cance is attached to this fact. The dorsal side of both radials 

 and brachials, however, is strongly convex, leaving distinct inter- 

 mediate grooves. The base is broken off. The heterotomy of the 

 arms is not detected as readily as in typical specimens of Ohio- 

 crinus laxns. 



5 — Lichenocrinus subaeqitalis, sp. nov. (Plate I, Fig. 10) — 

 Two specimens occur, in contact with each other, on the same 

 rock fragment, obtained at the railroad cut 59.8 miles from Lud- 

 low. They consist of the basal attachment disc of some crinoidal 

 organism, and one of the specimens retains the basal part of the 

 peculiarly jointed column. The heads of one of the Cincinnatian 

 species of Lichenocrinus have been known for some time, and Mr. 

 Frank Springer has in his possession a head which promises to 

 give some insight into the relationship of this peculiar genus. 



The attachment disc of the Rogers Gap form is about 6 mm. 

 wide and a little over a millimeter in height, the downward slope 



