the Indiana Geological Survey for 1891, p. 637, took the liberty of stating, 

 most unwarrantably, that we had described, in the third part of the 

 Eevision of the Paleeocrinoidea, p. 173 (1885) the arms of Pisocrinus, 

 which we " knew nothing whatever about." The tone of his article was 

 such as to preclude any notice from us, except to publish this figure in 

 refutation of his statement. Angelin figured the arms of Pisocrinus as 

 early as 1877.) 



Allageorinus Carpenteri W. and Sp 78 



Fig. 11. The type specimen, with two arms in one or more of the rays. (Illinois 

 State Collection.) 



Stephanockinus angulatus Hall 46 



12. A very elongate specimen. (Amer. Mus. Nat. Hist. New York.) 



13. The disk in perfect preservation ; the centre closed by five symmetrical 



orals. (Same collection.) 



Catilloorinus Wachsmuthi M. and W 72 



14. Specimen with arms, ventral tube and stem. (Coll. W. and Sp.) 



Maesupiocrinus radiatus Angel 103 



15. The tegmen, with small, regularly arranged covering pieces (f). (Drawn 



from a specimen in the Zool. Eiks Mus., Stockholm, by Mr. G. Liljevall). 



