Description of Twelve New Fossil Species. 109 



both at the upper and lower ends. It is three inches in length, and 

 has a diameter of 1 1-lOth inches, where it is broken off at the lower 

 end, and 1 9-lOths inches at the upper end. The greatest diameter of 

 the most ventricose part is 2 2-lOths inches. From the appearance of 

 the specimen we infer that ^ inch would reach the summit, at the 

 upper end, and that 1^ inches would reach the column, at tlie lower 

 end. This addition would make a complete specimen, about five inches 

 in length. The bod}' would, therefore, be described as very long, grad- 

 ually enlarging from below, and ventricose in the upper half. 



The body is covered hy plates of unequal size and irregular form. 

 They var^- from a pentagon to a nonagon. and from a diameter of 

 1-lOth to a diameter of 6-lOths inch. 



In the three inches in length of the specimen illustrated, if the 

 plates were regularly disposed, there would be about ten ranges. 



The plates are all more or less convex, and perforated b}^ numerous 

 pores. 



I collected this specimen in the lower part of the Niagara Grouj) 

 in Ripley county, Indiana. 



I have now described fourteen species of Kolocystites, from the 

 lower part of the Niagara Group of Indiana, and have been unable to 

 identify a single species, with those found in the Niagara Group of 

 Illinois and Wisconsin. Fragnoents of other species have been found, 

 in Indiana, but those, which I have seen, are not in a condition to be 

 defined. 



Anomalocrinus caponipormis (Lyon). 



Plate IX., fig. 4, basal view. 



fig. 4a, view of the summit. 



The bod}^ below the arms is almost flat, except as to the curving 

 up on the az3'gos side; and the entire height of the bodj-, from the 

 junction with the column, to the top of the plates preserved on the 

 dome is onl}- a little over one third of the width of the body, and is 

 less than the width of either one of the arm-bearing radial plates. 



The five basal plates, when united, form a large pentagonal figure. 



The first radial on the right of tlie azygos side, is much the largest 

 plate of the body. Two sides rest upon two basal plates ; one side 

 joins the first azygos radial; one joins the second azygos radial; one 

 , supports the single azygos inter-radial; one joins the posterior first 

 radial, and another the posterior second radial. These seven sides by 

 no means bound the plate, for it curves over upon the vault, and a 

 wide cleft or yoke-like opening extends from the plates covering the 

 dome, to the center of the plate, where the free arm plates rest. 



