No.1749. .1 VEW EUROPEAN CRINOID— CLARK. 333 



stouter than those succeeding, and tapers very gradually to the tip; 

 it is not so slender dist ally as in A. bifida; the third and following 

 segments have the distal outer edge produced and finely spinous, 

 this increasing gradually in intensity and becoming prominent in the 

 outer half of the pinnule. P 2 7 nun. to 8 nun. long with twelve seg- 

 ments, the first about twice as broad as long, the second squarish, the 

 remainder about twice as long as broad, becoming terminally about 

 three times as long as broad; the third and following develop pro- 

 jecting and spinous distal outer edges which are quite prominent ; P 3 

 and following pinnules similar to P 2 ; the distal pinnules are 10 mm. 

 to 12 mm. long, exceedingly slender, with twenty segments, the first 

 longer than broad, the remainder greatly elongated v\ it 1 1 swollen 

 articulations. 



Type-specimen. — Cat. No. 24313, U.S.N.M., from Trieste. 



Ninety-six additional specimens from Trieste were examined. 



Cotypes are in the Copenhagen Museum, Copenhagen, Denmark; 

 the Zoological Museum at Berlin, Germany, and in the Museum of 

 Comparative Zoology at Cambridge, Massachusetts. 



