PiLO. 



650 



PUoceras e^plavator. 



Pisocrinus gemmiformis, S. A. Miller, Journal of the 

 Cincinnati Society of Natural History, Vol. 2, 1879, page 113, 

 a small stone lily with pea-shaped calyx or flower, with five 

 basal plates, three larger ones, and three small intermediate 

 ones; five arms; and a round column, or stem. Niagara form- 

 ation^ V b. 



Pisocrinus globosus, Ringueberg, {Triacrinus glolosus,) 

 Proceedings of the Academy of Natural Sciences, PhiladelpJiia. 

 1884, p. 146. Clinton formation, Va. (S. A. Miller.) 



Pisocrinus pyriformis, Ringueberg, ( Triacrinus pyri- 

 formis^) Proc. Acad. Nat. Sci., Philada., 1884, page 145. Clin- 

 ton formation, Va, (S. A. Miller.) 



