142 



costals less than half the size of the radials. Distichals 

 2x10. comparatively small, wider than loii^-. the second 

 ones axillary. 



x3 



Fig. 23, a-d. Gennceocrinns iiyssa. (a) radial; (b. c) brachial: (6, cost. 1. c, cost. 2); (cO 

 interradial. 



Fig. 24, e-g. G. eucharis. {e) Plate of unknown position, bearing tubercle or spine; 

 (/. g) interradial (?) plate; (_h) tegminal spine of unknown species; (i) spines of Dorycrinus 

 (?) sp. ; (fcipart of calyx of unknown affinities. (All enlarged. Original.) 



Found as dissociated plates in the Demissa and Stictt)- 

 pora beds of Section ."i (rather rare). 



Genn.-eocrixus euchakis. (Hall.) (Fig-. 24, e-g.) 



{Actinocrinus eucharis. Hall, loth Rep't, N. Y. State 

 Cab. Nat. Hist., p. 130.) 



Distinguishing Chnnicters. — Low basals. large radials; 

 cost.' hexagonal, cost.' pentagonal, small; ten or eleven 

 interradials in each interradius, except the anal interradius, 

 which contains a greater number ; strong, radiating surface- 

 ridges on plates ; center of plates nodose. 



Found in the Demissa bed of Section 5, as detached 

 plates (rare). 



