PROCEEDINGS OF THE UNITED STATES NATIONAL MUSEUM 



by the 



SMITHSONIAN INSTITUTION 

 U. S. NATIONAL MUSEUM 



Vol. 88 Washington : 1940 No. 3080 



CESTOCRIXUS, A NEW FOSSIL INADUNATE CRINOID 



GENUS 



Bv Edwin Kikk 



In 1934^ I described tlie new erinoid oemis Corynecnnus. for the 

 reception of which and one other genus {Lecyfhoerhuis J. Miiller) 

 I proposed the family Lecvthocrinidae in the order Inachmata. 

 Both genera are of Devonian age. one from Europe and one from 

 the L'nited States. I am now able to add anotlier genus to this 

 family, coming from the Mississippian (upper Borden) of Indiana. 



CESTOCRINUS, new genus 



Genotype. — Cestocrhius striatus. new species. 

 Generic diagnosis. — 

 Crown. SnbcylindricaL 

 Dorsal cup. Campanulate to urn-shaped. 

 IBB. Five. Large, approximately one-third the height of the dorsal 



cup. 

 BB. Of medium size, except post B, which is very large, extending 



to the level of the arm bases and supporting two tube plates. 

 RR. Relatively small. Arm facets elevated above level of plates, 



horseshoe-shaped, and approximately one-half Avidth of radial 



at that level. 

 Arms. Relatively slender, composed of subcylindrical, long Br. 



Number of IBr variable : 3 in 1 ant R ; 4 in r ant R ; more than 



4 in ant R in type species. 



1 Corynecritius, a now Devonian crinoi<l genus. Proc. U. S. Nat. Mus., vol. S3, pp. 1-7, 

 1 pi., 1934. 



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