PLATE XXIV. 



Pace 

 IIadrocrinus discus Lyon 328 



Fig. 1. The type specimen; dorsal aspect. (Coll. S. S. Lyon.) 



Hadroceinus plenissimus Lyon 328 



2a. The type specimen ; dorsal aspect. (Coll. S. S. Lyon.) 

 2b. Inner floor of dorsal cup. (Same collection.) 



Technoceinus Andeewsi Hall 306 



3. The type specimen, after Hall. (From a gutta percha cast made from 

 a natural mould in sandstone.) 



Melocrixus pachydactylus (Hall) 29G 



4rt. The type specimen. (After Hall.) 



ib. Another specimen. (Am. Mus. Nat. Hist.) 



Meloceinus bainbridgensis Hall and Whitf 297 



5. The specimen described by S. H. Williams as Melocrinus Clarkei. (N. Y. 



State Cabinet of Nat. Hist.) 



(?) Stelidiocrinus aegutus (Walcott) 280 



6. The type specimen. (After Walcott. Coll. Mus. Comp. Zool.) 



Allocrinus typus W. and Sp 307 



7a. Side view of one of the types. (Coll. W. and Sp.) 

 lb. Basal view of same specimen. 



Allocrinus Benedicti S. A. Miller 308 



8a. Side view of calyx. (Same collection.) 

 8J. Basal view of same specimen. 



