INDIANA PALEONTOLOGY. 187. 



ZAPHRENTIS CLINATUS, N. Sp. 



Plate 56. Figs. 6, 7, 8, 9. 



Corallum simple, rather small, compressed, turbinate, regularly curved. 

 Acute at the point of attachment. Height from ten to twenty millimeters. 

 Calix oblique, from ten to fifteen millimeters in diameter. Depth five millime- 

 ters. A flat space in the bottom of the calix, occupied by the tabulae, five mil- 

 limeters in diameter. Number of lamellae sixty-six in the circumference of a 

 calix, twenty millimeters in diameter, unequal in size at the margin, alternat- 

 ing below, gradually sloping to the bottom of the calix, where the short ones 

 terminate, the longer ones continue to within two millimeters of the center of 

 the calix and abruptly end, leaving a smooth concave space four millimeters 

 in diameter. Fossette consists of a deep depression in the center of the calix, 

 and eontinues to the posterior margin. Exterior M-ith moderately fine longi- 

 tudinal striae, ten in the space of five millimeters. Surface comparatively 

 smooth. 



Found in the Warsaw division of the St. Louis group (Sub-carboniferous) 

 at Edwardsville, Indiana. Now in the collection of the author. 



CYATHAXONIA YEN U ST A.. 



Plate 56. Figs. 10, 11, 12, 13, 14. 



Cyathaxonia compressa, (i. K. Greene, Contribntion to Indiana Palaeontology. Part 2, page 9, 

 plate 4, figures 14, 15, 16, 17, Januarry, 1899. 



Cyathaxoia, compressa, Thompson, in a paper on some new species of Corals, read before 

 the Philosophical Society of Glasgow, Scotland, December 19, 1877. 



ACTINOCRINUS M ULTI R A M O S U S, Var. Altidorsatus, N. Var. 



(Rowley) 



Plate 57. Figs. 1, 2. 



The dorsal cup of this crinoid is hardly as wide as high and all the plates 

 are strongly nodose. Instead of radiating ridges, the top of each node is oc- 

 cupied by a cross lunulate depression. A low, delicate, rounded ridge passes 

 from plate to plate in the radial series. The arms apparently spring from 

 small distichals resting upon the second costals; in other words the arms are 

 free above the first distichals. There are three interbrachials to the interra- 

 dial series. 



The anal Interradials as far as can be made out are one, three and proba- 



