5(]G PALEONTOLOGY OF ILLINOIS. 



by one of the subradials. Arms, so far as can be seen on 

 the specimen under examination, composed of a series of 

 subcuneate interlocking pieces. Surface of all the body 

 plates below the second radials smooth. 



Locality and position Upper Coal Measures, Hickory creek, Fayette 

 county, Illinois. 



EUPACHYCRINUS TUBERCULATUS, M. and W. 



PI. 24, Fig. 9. 

 Erisocrinus tuberculatus, MEEK arid WOKTHEN, 1866. Geol. Survey of 111., Vol. IT, p. 319. 



Locality and position The detached plates from which the original 

 description was drawn were found in the roof shales of Coal No. G, near 

 Brighton, Jersey county, Illinois. The more perfect specimen figured 

 on PI. 24 is from Parke county, Iowa. 



/ 



AGASSIZOCRINUS CARBONARIUS, Worthen ]\Is. 



PI. 24, Fig. 4. 



THIS species is only known from the anchylosed basal and subradial 

 plates here figured, and it is the only fragment of this genus, so far as 

 I am aware, that has been found in the Coal Measures. 



Locality and position Upper Coal Measures, Shelby county, 111. 



MOLLUSCA, 



BRACHIOPODA. 

 Genus CHONETES, Fischer. 



MILLEPTINCTATA, M. and "W. 



PI. 25, Fie 3. 

 Chonetet ? ? rnittepunctata, MEEK and WORTHEN, 1870. Proceed. Acad. Nat. Sci., Phila., p. 35. 



SHELL attaining a large size, very thin, transversely sub- 

 semicircular, or more than twice as Avide as long, with lat- 

 eral extremities rounded. Dorsal valve nearly flat, or but 



