?^**^ 



.^ 



NIAGARA FALLS AND VICINITY 1 57 



smaller ones; calyx plates finely ornamented by granules, which 

 become elongated near the margins of the plates; two simple disti- 

 chals in each arm, abruptly followed by 

 the biserial arm plates. ^^^^ ^' «^-^ 



Found in the talus of the weathered <^^i . >^ 



Rochester shale above Lewiston, prob- 

 ably from the thin calcareous beds 

 of the lower part of the shale. Also 

 in the same shale at Lockport (Hall). 



Glyptocrinus plumosus Hall (Fig. 

 52) (1852. Pal. N. Y. 2 :i8o, pi. A41) 



Under this name Hall has figured ^ J ' ■ ■ j 



and described fragments of the stem 



1 r • • 1 r j_i /-^i* Fig. 52 Glyptocrinus plumosus the arm 



and arms of a CrmOld from the Clm- pinnules and stem with an enlargement of 



stenT joints 



ton beds of western New York, which 



he states is extremely rare at Niagara, but often common farther 

 east. The characteristics of these fragments are shown in the illus- 

 trations here reproduced. 



Genus eucalyptocrinus Goldfuss 



[Ety.: eu, well; xakuizxeLv , cover; ^c^oiVov, lily] 



{1826. Petre facta Ger maniac, p. 212) 



Calyx with a deep concavity at the lower end, of which the 

 monocyclic base forms the bottom. Calycinal plates having 

 throughout a pentameral arrangement, except the basals, which are 

 only four in number. Radials in contact all around, costals 2x5, 

 distichals 2 x 10, and above these the palmars in cycles of 20, and of 

 small size. There are 1x5 large interradials, above which are two 

 narrow and elongate interbrachials placed side by side. Between 

 the distichals is in each ray one interdistichal, which has nearly the 

 form and size of the two interbrachials combined. On the inter- 

 brachials and interdistichals and the tegmen rest 10 partitions, which 

 extend upward and form compartments which- contain two arms 

 each. Arms biserial, composed of very narrow pieces. A proboscis 

 surmounts the tegmen and projects above the arms. Stem round. 



Eucalyptocrinus decdrus (Phillips) (Fig. 53) (Hall. 1852. Pal. 

 N. Y. 2:207, pi. 47) 



Distinguishing characters. Stem consisting of alternating thicker 

 and thinner joints, the former wider than the latter, with rounded 



