J37. CONTRIBUTION TO 



The first radials are hexagonal and broader than long. 



The second are quadrangular and wider than long. 



The third are pentagonal and broader than long. 



The first radial of the second series is axillary. 



Two of the rays have one axillary plate in the third series. 



The first interradial is nine sided and a little larger than the first radial. 



The second interradial is smaller than the first. 



The basal plates form a low rim about the column baSe. 



The body is depressed and somewhat constricted just below the arm bases-, 

 the latter being strongly lobed. 



The arm openings are twenty-two, 5, 4, 4, .5, 4. 



The plates of the ventral surface are ornamented, especially in the depres- 

 sions between the arm lobes, by granular nodes and by strong spine-like tuber- 

 cles about the central small proboscis and along the ambulacral ridges. 



The calyx plates have central strong nodes, connected on the radials by ai 

 low ridge and giving off lines of nodes on the interradials. 



The basal portions of this specimen have been injured and have been so. 

 represented in the picture. 



The specific name is in honor of Mr. Frank Springer, of Las Vegas, N. M.,. 

 one of America's best workers in Crinoids. 



From the same horizon, locality and collection as the last. 



DOLATOCRINUS ARROSUS, Var.'Cognatus, N. Var., (Rowley)- 



PLVfE 39. Figs. 12, 13, 14. 



There is but little basal flattening. A stem joint is attached to the base. 



The radial plates have central nodes connected by sharp ridges. The first 

 interradial has a central node and a few radiating lines. Similar lines leave- 

 the radial centers. The plates are of unusual shape and number in the calyx, 

 the first radials being hexagonal; the second, quadrangular; the third, pentago- 

 nal, while the first interradial is nine sided and supporting above a second but. 

 smaller interradial. There are nineteen arm bases. 



The ventral disk is convex and ornamented by spinose tubercles. 



The anal tube is excentric. 



The arm groups form distinct lobes. 



Horizon, locality and collection the same as the last. 



This form may be compared with both D. cvelatus and D. arrosus^ spec- 

 ies of sixteen arm bases. 



