Plate VIII. 



Fiir. 1.— A form of Daemonplix without axis or transverse trunk. 



Fi»r. 2. — hottom view of same. 



Fig. 3._A lame Uiipmonelix with three transverse trunks, as seen in the quarry, upper 



beds, near Squaw Canyon, Sioux Co., Neb. 

 Fig. 4._An example of "Twin Screws" or double Daemonebx. The transverse trunk bears 



nil nsci-ndinp; spiral at one end; a smaller descending one at the other. Middle 



bed«, near EaiileCrapr, Sioux Co , Neb. 

 [From specimens in the collections of the Hon. Charles H. Morrill, State Museum ] 



