-2.*j6 



NEW YORK STATE MUSEUM 



bear two crescentic depressions which face each other; their, inner 

 ends reach to the edge of the food groove; and partly inclosed 

 between them is a third somewhat triangular depression pointing 

 '.toward the food groove but situated nearer the outer edge of the 



Fisf. 3 Analysis of Malocystites emmonsi, 

 specimen C [pi. i, tig. 7] 



plate. Surrounding all is a well rounded but not prominent ridge. 

 The smallest plates seem to have had short extensions which were 

 bent below the horizon of the sigma. Going toward the larger plates 

 the angle of each truncate face gradually changes till we reach the 

 larger and more vertical brachioles. The normal specimens have six 

 grooves running into the posterior portion of the sigma and eight 

 into the anterior portion, but it is difficult to determine whether these 

 grooves represent so many separate plates. The last two are very 

 small and I have as yet been unable to detect a suture between them. 



