136 ECHINODERMATA—PELMATOZOA SUB-KINGDOM III 
Triacrinus, Miinst. (Fig. 237, B). Differs from the preceding in having but 
three B. W. een has abe ae. however, that some of the Eifel specimens 
occasionally have five B, thus leading to the inference that the two forms are 
identical. Devonian ; Eifel, Fichtelgebirge. 
Family 4. Symbathocrinidae. Wachsmuth and Springer. 
‘alyx small, bowl-shaped, composed of three unequal or of five equal basals, and five 
nearly equal radials. Tegmen formed by five small, asymmetrical orals ; between these 
and the radials extends a long, anal tube, which, however, is not supported by anal 
plates. Entire upper edges of the radials bevelled off so as to form straight articular 
facets, which ave furnished with well-developed transverse ridges. Arms five, simple ; 
column round, Devonian and Carboniferous. 
Symbathocrinus, Phill. B three, unequal; F&F five, long, quadrangular or 
pentagonal. The posterior oral larger than the others. Anal tube long, very 
slender, resting partly upon the radials and partly upon the orals. Arms long, 
uniserial, and composed of comparatively thick ossicles with sharp angular edges. 
Carboniferous ; Great Britain and North America. 
Phimocrinus, Schultze. Differs from the preceding in having five 6. De- 
vonian ; Europe. 
Stylocrinus, Sandb. Distinguished from Symbathocrinus mainly by the 
character of the radial facets, 
which are directed obliquely 
downward and inward, in- 
stead of upward and outward. 
Devonian. 
Stortingocrinus, Schultze. 
Devonian. Lageniocrinus, de 
Kon. Carboniterous. 
Family 5. Cupressocrinidae. 
dOrbigny. 
Culyx large, basin - shaped, 
composed of five equal basals and 
Jive equal radials ; the basals en- 
closing u central pentagonal plate, 
which in all probability represents 
Jive anchylosed infrabasals. Upper 
ca fuces of radials broad, truncate, 
and forming an even horizontal 
Cupressocrinus CTASSUS, Golat. ddan Gerolstein, Eifel. line. Costuls compressed, flange- 
, Perfect specimen, natural size; b, Cross-section of column; ¢ 9 y, moruline ar 
” Centrodorsal plate ; d, Section ‘through the folded-up arms, shaped. A peculia cnet 
2 aE well-preserved inrolled pinnules, plated covering of structure, the so-called “ consolidat- 
ambulacral furrows, and neuro-vascular canals perforating the . : rye 5 ] ] 
ossicles ; e, Interior of calyx from above, showing the five con- VL7 apparatus, situated on the 
solidating plates; the lowermost containing the anal opening ; yy ses oy / 0 rs 
Jf, Radial pierced by ambulacral opening, but with wall covering, uppel nteror margun of the cal ya: 
the same partly broken away ; g, Side-view of radial in which the between the arm - bases. Arms 
ring-like covering of the ambulacral opening is preserved intact. 5 a 5 : : 
Jive, simple, uniserial, and closely 
folded ; they are composed of broad thick plates united by close sutures, and are 
traversed by a well-developed dorsal canal. Column pierced by a large axial and 
three, four, or five peripheral canals. Devonian. 

