OKDKH V 



(III NOM >KA ARTICULATA 



165 



K.iinily -2. Marsupitidae. d'< )rl.i-nv. 



Base dicydic. Dorsal cup large, composed of large, thin plates. Column absent ,- 

 /,/,/vs,-///rr/ lii <i fhi/i jHitfaijonal, (?) dorsocentral, or ce.ntrodorsal plate. 1 Infrabasals 

 five; basals five; nnliiilx five; interradials and anals wanting. Upper edges of 

 radiak furnished u-ith a small crescent-shaped articular facet, having a perforated 

 transverse ridge. Arms Irranching, unisrrial, muJ fi'i'> rW //// dorsal canals. Struc- 

 t ''>/ 1 ncn and pinnules unknown. 



The only known ^I'lius is Marsupites, Mantell, occurring in the Upper 

 Cretin-rims (White Chalk) of England and Northern Germany (Fig. 274). 



FIG. 274. 



.Vi'/>-/'/./V.-s t>; ttn, i;,im -Is, Schlot. sp. Upper 

 -us ; Liiin-hurj,', Prussia. </, Calyx, 

 natural size ; h, J{;ili;il, and a few of the ann- 

 li!iit-s ; .-, Tips of the arms. 



Uintacrinus Wcstphalicus, Scliliit. Upper Cretaceous ; 

 Recklingshausen, Westphalia, a, Calyx viewed from the 

 side ; l>, Inferior aspect. Natural size (after Schliiter). 



Family 3. Uintacrinidae. Zittel. 



^'/iiimetry perfectly pentamerous, plates thin, column wanting. Base monocydic ; 

 A//.NV//.S five, enclosing a small, pentagonal, (?) dorsocentral, or centr odor sal plate. 

 < v,.s/r//.s two, the upper one axillary, and suppoi'ting two rows of distichals which are 

 succeeded by palmar s. Interbrachials numerous, the lowermost ring interposed 

 between the costals. Arms long and pinnulate ; composed of very short, almost 

 circular ossicles. Pinnules heavy and closely abutting ; the lower ones united by 

 MI in res, and incorporated into the calyx. 



The solitary genus Uintacrinus, Grinnell (Fig. 275), occurs in the Upper 

 Cretaceous of Kansas and Westphalia. 



Order 5. ARTICULATA. Johannes Miiller. 

 (Neocrinoidea, Carpenter; Pentacrinacea, Neumayr.) 



Tegmen coriaceous] studded with minute calcareous particles, or covered with well- 

 defined small plates of irregular arrangement. Mouth and food-grooves exposed ; orals 



1 [This plate is supposed l>y Carpenter to represent the distal plate of the stem, and not the 

 proximal one. TKANS. ] 



