16 PROCEEDINGS OP THE NATIONAL MUSEUM vou 70 



upward through the Liberty, where it is most frequently met with, 

 and up to a height of ten feet or more in the Whitewater. 



DermatostroTTia corrugatum (Foerste) : The type of this species 

 was found in the Ischyrodonta bed (Wh. 5) of the Whitewater along 

 Dutch Creek, Clinton County, Ohio. Like all the colonies of D. 

 glytum we have seen, this specimen had chosen as its host the shell 

 of Endoceras proteifonne. Partial decay of the latter left the 

 specimen free, and subsequent pressure had caused it to break into 

 several rather large fragments, one of which Doctor Foerste chose 

 as the type. 



DermatostroTria glyptum (Foerste) : The type of this species now 

 in the National Museum was collected in the lower bed (Wh. 3) of 

 the Oakland division in Dutch Creek, near Oakland, Clinton County, 

 Ohio. The species is apparently rare and does not seem to extend 

 higher than about 15 feet above the base of this division. 



Dre'paneTla i^hardsoni (Miller) : The type of this interesting os- 

 tracod came from the beds of the same name (Wh. 6 of the Oakland 

 division) along Dutch Creek, Clinton County, Ohio. Here its free 

 and entire shells outnumber those of aU other species of the class 

 associated with it. In the region its entire vertical range does not 

 exceed six feet, ending with the close of the Oakland. 



Glyptocrinusf fornshelli (Miller) : The type of this species was 

 found by Frank Fornshell in the crinoid bed (W. 17) at the top of 

 the Waynesville, 2i^ miles below Clarksville, Ohio, in the middle one 

 of three small streams which cross the Clarksville and Morrow pike 

 and later along unite to form one of the tributaries of Todds Fork. 

 These branches are locally known as Madden's Run. 



Lichenocrinus ajjinis (Miller) : On lower Cowan's Creek in Clinton 

 County, Ohio, one-half mile above the crossing of the Wilmington 

 and Clarksville pike and the stream, there is an extensive exposure 

 along the left bank, near the base of which the upper Hehertella 

 inscul'pta bed is exposed. During the summer of 1898 we found 

 in this bed a lenticular mass of rock four or five feet in diameter 

 and not more than one or t>vo inches thick at the center, the thickest 

 part. This sheet was made up largely of the shells of Zygospira 

 modesta^ a few bryozoans and many fragments of Isotelus maxhrvus, 

 the interspaces being filled with clay and all tightly bound together 

 by crystallization. Attached to many of the bryozoans and to many 

 of the fragments of Isotelus were the basis of Lichenocrinus affinis. 

 Again arising from the center of many of these disks were slender 

 crinoidal columns which extended out from ths disk through the 

 clay for a greater or less distance to the point where they had been 

 broken off. With these were sections of other columns identical in 

 size and structure with these which when followed along away 



