362 Proceedings of the 0/iio State Academy of Science. 



1895. Cyatlwcriiitis Ma.vvillensis. Whitfield, Geol. Surv. Ohio, Vol. VII, 

 p. 41)5, pi. 9, figs. 5-8, 

 Maxville limestone: Newtom-ille, Ohio. 



Description. ■ — ^"Body of rather small size. Calyx deep 

 C3'athiform, being nearly hemispherical in one exam])le, and 

 somewhat broad abconical in another, and composed of smooth 

 plates, which have only the general convexity of the body, or 

 very slightly tuberose. Ilasal plates minute to moderate size, 

 higher than wide. Siibradials large ; height and width nearly 

 eqital ; two of them heptagonal and the others hexagonal, the 

 lower sides barely diverging from a straight line. First radials 

 wider than high, and about two-thirds as high as the subradials. 



Fig. 3. — Cyatliocrinns utaxvillejisis. 



a. — View of the anal side of a specimen showing the long second 



radials, enlarged to two diameters, 

 b and c. — Anterior and posterior views of another specimen show- 

 ing the large outer arm. 

 d. — Anterior view of a third specimen. (After AVhitfield.) 



Anals visible, three in ntmiber; the first elongate pentagonal, 

 nearly twice as high as wide, and situated a little oblicjuely on 

 the right side of the area ; the other two are small and pentagonal. 

 Second radials, or first arm plates, smaller than the first radials 

 and narrowing upward, wedge-formed above, and each support- 

 ing two arms. On the posterio-lateral rays they are long and 

 cylindrical, with the arms slender. On the anterior ray, it is 

 short and supports two slender arms ; while on the anterio-lateral 

 rays they stipport a slender arm siinilar to those of the other 



