:HH CRINOIDEA CAMERATA I r. 



to its t<p. are ten partitions supported by the intcrbrachials and inter- 



ii-i : ri 1-2 

 dist.l (list." 



FIG. 252. 



( ioldfuss. Devonian; Gerolstein, Eifel. A, Perfect crown. B, Diagrammatic 

 longitudinal section of the calyx (b, Basals ; >!, Hadials ; r'l, First costals ; y, Lower, and 5, upper piece of the 

 wing-likf processes). (,', 'IVginen. J>, Dorsal cup (/!, Radials; -', First costals; ir, Interradials ; <li.<t., Dis- 

 tichals ; Int. flint., Interbrachials, after L. Schultxe). 



distichals, which form deep, vertical compartments for the reception of two 

 arms each. Arms twenty, biserial ; composed of very narrow pieces. Column 

 round. Silurian ; Gottland, 

 Ki inland (Wenlock Lime- 

 stone), and North America 

 (Niagara Group). A single mf 

 >jiecic8 occurs in the De- 

 vonian of the Eifel. 



fiill'ii-niniSy Aug. (Fig. 

 2 53). Calyx flask-shaped ; 

 i< >IK -a\ it vat the base deeper 

 and wider than in the pre- 

 ceding, sometimes involv- 

 ing not only the radials, 

 but parts of the costals as 

 well. Partitions for the 



ro^rtfinii nf flin arm* nnli CWHcrtiMM n ,.-</< i his, Hising. sp. Silurian; Gottland. A, Crown. 



I CCeptlOll Ot the arms mUCh B> Calvx . shl , win ., th( . coBsKtlon of the tegmen. C, Inner or ventral 



shorter extending tO less as P ect ot the base. D, Outer or dorsal aspect of the same. Natural 



i 'ir .1 1-1 c ! sixe (after Angelin). 



than half the height of the 



aims. Otherwise similar to Eucalyptocrinus, arid sharing the same distribution. 

 Hypanthocrimts, Phill.' Probably identical with Eucalyptocrinus (Fig. 251). 



Family 10. Crotalocrinidae. Angelin (emend. W. and Sp.) 



Base dicyclic. Dorsal cup composed of five infrabasals, five basals, five radials, 

 an anal plate, and the lower brachials, which are laterally in contact. Upper edges of 

 radials more or less excavated. Tegmen fiat or bid slightly elevated ; its plates immovably 



Fio. 253. 



