142 



costals less than half the size of the radials. Distichals 

 2x10, comparatively small, wider than long, the second 

 ones axillarv. 



X3 



Fig. 28, ctr-d. Gennceocrinus nyssa. (a) radial; (6. c) brachial; (6, cost. 1. c, cost. 2); (d) 

 interradial. 



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

 C/, g) interradial (?) plate; (K) tegniinal spine of unknown species; (i) spines of Dorycrinus 

 CO sp. : (k) part of calyx of unknown affinities. (All enlarged. Original.) 



Found as dissociated plates in the Demissa and Sticto- 

 pora beds of Section 5 (rather rare). 



Genn.eocrinus eucharis. (Hall.) (Fig. 24, e-g.) 



(Actinocrinns eucharis. Hall. 15th Rep't, X. Y. State 

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



Distinguishing Cha meters. — Low basals. large radials; 

 cost. 1 hexagonal, cost. 2 pentagonal, small; ten or eleven 

 interrn dials in each interradins, except the anal interradius, 

 which contains a greater number; strong, radiating snrface- 

 ridges on plates; center of plates nodose. 



Found in the Demissa bed of Section 5, as detached 

 plates ( rare). 



