F. B. Meek—Fossils of the Illinois Geological Report. 485 
destitute of free arms: or, in other words, that arms were 
united (“soldered”) laterally along their entire length, so as 
to form a large, cylindrical, upward extension as wide as the 
formed, may really 
Specimen from which the arms had been accidentally removed. 
and ventral part more or less flattened by pressure, it would 
certainly present very nearly, if not exactly, the appearance of 
