ORDER II CRINOIDEA—CAMERATA 149 
ing to its top, are ten partitions supported by the interbrachials and inter- 

ee able Pate 
dist.1 dist.1 

PIG. 252. 
Eucalyptocrinus rosaceus, Goldfuss. Devonian; Gerolstein, Eifel. A, Perfect crown. 5, Diagrammatic 
longitudinal section of the calyx (6, Basals ; rl, Radials ; 72, First costals ; y, Lower, and 6, upper piece of the 
wing-like processes). C, Tegmen. D, Dorsal cup (71, Radials ; r2, First costals; ir, Interradials ; dist., Dis- 
tichals ; int. dist., Interbrachials, after L. Schultze). 
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, 
England (Wenlock Lime- 
stone), and North America 
(Niagara Group). A single 
species occurs in the De- 
vonian of the Eifel. 
Callicrinus, Ang. (Fig. 
253). Calyx flask-shaped ; 
concavity at the base deeper 
and wider than in the pre- 
ceding, sometimes involy- 
ing not only the radials, 
but parts of the costals as 
well. Partitions for the 
Cullicrinus costatus, Hising. sp. Silurian; Gottland. A, Crown. 
reception of the arms much B, Calyx showing the construction of the tegmen. C, Inner or ventral 
shorter, extending to less aspect of the base. D, Outer or dorsal aspect of the same. Natural 
2 size (after Angelin). 
than half the height of the 
arms. Otherwise similar to Hucalyptocrinus, and sharing the same distribution. 
Hypanthocrinus, Phill. Probably identical with Hucalyptocrinus (Pig. 251). 
B C 
D 

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 flat or but slightly elevated ; its plates immovably 
