180 THE CRINOIDEA CAMERATA OF NORTH AMERICA. 



1885. Befeocrinus Onealli — W. and Sp. ; Revision Palseocr., Part HI., p. 86. 

 1889. Gaurocrinus Nealli — S. A. Miller; North Amer. Geol. & Palseont., p. 247- 



Syn. Gli/ptocrinus cognatus — S. A. Miller; 1881, Cincin. Journ. Nat, Hist., Vol, lY., p. 75, Plate 

 1, Pigs. 5, ha. 



Syn, Gaurocrinus cognatus — S. A. Miller; 1881, Cincin. Journ. Nat, Hist., Vol. VI., p. 229. 



Syn, Reteocrmus cognatus — W. and Sp, ; 1881, Revision Palseocr., Part II., p, 193, 



Calyx obconical ; interradial and interaxillary spaces deeply depressed, 

 producing a pentagonal outline below the distichals, and decagonal above 

 them. 



Infrabasals small, but projecting beyond the column. Basals large, their 

 lateral margins deeply impressed, forming an elongate pit in which the upper 

 angles of the infrabasals and the lower angles of the radials are involved. 

 The radials, costals, and lower distichals are folded abruptly inward, their 

 sides extending to the bottom of the interradial and interdistichal spaces, 

 leaving a very narrow surface exposed, not more than the width of the 

 arms. Distichals ten to fourteen, of which six to seven are located within 

 the calyx walls, the others free. Of the fixed plates, the three or four 

 proximal ones are larger and especially longer than the succeeding ones, 

 which are nearly as short as the free plates. A second bifurcation takes 

 place in the free arms, giving twenty arms to the species. Arms long, 

 cylindrical, gradually tapering, and composed of short, wedge-formed pieces. 

 The first pinnule, which is given off from the second distichal, is more erect, 

 and considerably stouter than any of the rest. The second pinnule, which 

 occurs on the opposite side at the fourth plate (the third bears no pinnule), 

 is smaller than the first, but larger than the third, which is of the ordinary 

 size. The three proximal pinnules are incorporated into the calyx, the 

 succeeding ones free. Interbrachials and interdistichals very numerous, 

 exceedingly small, and of very irregular form and size ; the marginal pieces, 

 as a rule, being smaller than the others. Anal side marked by a conspicuous 

 median ridge. Tegmen low-hemispherical, decagonal in outline ; the spaces 

 overlying the food grooves slightly elevated. Anal opening excentric, almost 

 margiaal, placed in the middle of a small protuberance. Column pentan- 

 gular, the outer faces slightly impressed ; composed alternately of thin and 

 somewhat thicker plates, the latter protruding considerably beyond the 

 others. 



Horizon and Locality. — Upper part of the Hudson River group; Warren 

 Co., 0. ; rare at Cincinnati. 



Ti/pe specimen formerly in the collection of J. Kelley O'Neall, now^ in the 

 collection of Wachsmuth and Springer. 



