Agelacrinidae and Lepadocystinae 
455 
39. Hemicystites carnensis, sp. nov. 
(Plate III, Figs. 2 A, B) 
Two specimens of Hemicystites were found 20 feet above the 
level of the Ohio River on the creek flowing through Carntown, in 
the northeastern edge of Pendleton County^ Kentucky. They 
occurred on the same rock fragment at the Strophemena vicina 
horizon, in strata containing Platystrophia colhiensis, a variety of 
Plectambonites sericea, Dalmanella hassleri, Callopora multitahulata, 
Prasopora simulatrix, Prasopora falesi, Eridotrypa mutahilis, and 
Eridotrypa trentonensis . The horizon belongs apparently to the 
top of the strata just beneath the Brannon siliceous limestone as 
exposed in central Kentucky, near Frankfort. 
At Frankfort, a fine grained, siliceous limestone occurs about 50 
or 60 feet below the top of the upper or Benson division of the 
Paris bed. This limestone, called the Brannon member, is of great 
paleontological interest. In and just beneath this layer are 
found Strophomena vicina, Dinorthis ulrichi, and Stromatocerium 
pustulosum, species found also at a higher horizon, in the Cornish- 
ville layer. This is the horizon also for Brachiospongia, various 
species of Pattersonia, the form described as Chirospongia wenti, 
and other sponges not known from any other horizons. The 
immediately underlying strata are included by Ulrich in the 
Wilmore, while Miller, in his original description of the term, did 
not draw the line limiting the top of the Wilmore until at least 
40 feet lower, where Dalmanella bassleri ceases to be abundant. 
It is to the upper part of the Wilmore, as defined by Ulrich, that 
the Strophomena vicina horizon at Carntown is assigned. 
The chief interest in Hemicystites carnensis is due to the fact 
that hitherto only two species of this genus were known: Hemi- 
cystites parasiticus from the Rochester shale at Lockport, New 
York, and Hemicystites stellatus, from the Fairmount division of the 
Maysville, at Cincinnati, Ohio. Hemicystites carnensis brings the 
origin of this genus down to a much earlier horizon, and places the 
genus among those of long duration. 
Two specimens, discoidal, almost circular, faintly pentagonal, 
7 mm. in diameter. The theca rises abruptly at the side for a 
distance not exceeding two-thirds of a millimeter. Rays promi- 
nent, rising about half a millimeter above the general surface of 
