CALYPTOCEINIDiE. 347 



Eucalyptocrinus Lindahli W. & Sp. (nov. sjoec). 

 Plate LXXXII. Flrj. 9. 



1892. American Geologist, Vol. X. (September), p. 139. 



Syu. Eucalyptocrinus Wortheni S. A. Miller; 1S94, Geo!. Rep. 111., Bull. 3, p. 53, Plate i, Y\": 2. 



Above medium size. Most remarkable for its heavy, rounded arms, which 

 to their full length are elevated prominently above the outer faces of the 

 partition walls, so that the latter form the bottom of a deep groove. Dorsal 

 cup semi-globose, its lower concavity not larger than the width of the stem, 

 and enclosing only the basals, which are hidden from view by a narrow, 

 round stem. Plates not distinctly ornamented, merely showing a roughened 

 surface. Suture lines slightly grooved. 



Radials rather large, as long as wide, rapidly slojiing to the lower end ; 

 their lateral faces three times as long as the slanting upper ones ; the 

 superior face concave. First costals quadrangular, smaller than the radi- 

 als, a little wider than long. Second costals hexangular, wider and longer 

 than the first ; their sloping upper faces longer than any of the others ; the 

 upper angle slightly truncated by the interdistichal. First distichals smaller 

 than the axillary costals, the second less than half the size of the first, and 

 subquadrangular. Palmars three in the calyx, transversely arranged, rounded 

 on the back. First interbrachial ten-sided, as large as the radials, longer 

 than wide, widest at the middle ; the two of the second row nearly three 

 times as long as wide, rising to the height of the third palmars. The inter- 

 distichal a little shorter and narrower than the two upper interbrachials com- 

 bined. The walls forming the compartments taper gradually to near the 

 upper end, then widening rapidly, and curving abruptly inward so as to form 

 a flat surface at the summit on a level with the tips of the anns. Arms 

 rather short, very heavy, almost cylindrical. They rise above the sides of 

 the partitions much more conspicuously than is known to be the case in 

 any other species, their tips being lifted out from between them almost 

 completely. 



Horizon and Locality. — Niagara group ; Wayne Co., Tenn. 



Ti/pe in the Illinois State collection. 



The species is named in honor of Dr. Josua Lindahl, the eminent Zoolo- 

 gist and Director of the State Museum at Springfield. 



