404 W. A. Parks— Zepadoo'ystis dintonensis. 



Art. XXX Y. — A New Cystidfrom the Clinton Formation of 

 Ontario — Zepadooystis dintonensis / by William Arthur 

 Parks. 



In 1873, F. B. Meek described a peculiar Cystid from the 

 upper part of the Cincinnati formation at Richmond, Ind., 

 under the name of Zepocrinites moorei* This form, accord- 

 ing to Meek, differs from all other examples of Zepocrinites 

 by the possession of four instead of three pectinirhombs and 

 ■five instead of four arms. P. H. Carpenterf regards these 

 peculiarities as of generic value, and proposes to establish the 

 genus Zepadooystis for the reception of Meek's species. 

 Jaekel, in 1899. suggests Meekocystis as the generic name, but 



Fig. 1. 



<**j^ 



Lepadocystis dintonensis, sp. nov. 

 Fig 1. Viewed from the right posterolateral aspect, x 3 



Bather gives precedence to Carpenter's name and recognizes 

 the genus as a distinct member of the sub-family Callooystince 

 of the Glyptocystido3.% 



So far as I am aware, no other example of the genus has 

 hitherto been described, so that its discovery at a higher hori- 



*Geol. Sur. Ohio, Paleontology, vol. i, pp. 39-41, pi. iii, figs. 4a and 4b. 



f Jour. Linn. Soc. Zool., vol. xxiv, p. 10. 



% A Treatise on Zoology, E. Ray Lancaster, vol. iii, the Echinoderma, p. 61. 



