284 



E CHINODERMA TA. 



[SYN. 



izontal disk, completely isolating the 

 azygoua and interradial areas, from the 

 vault, and supporting the free, ascend- 



FIQ. 



ing arms around its margin ; interradi- 

 als 9 or 10 or more ; azygous interradi- 

 als 9 to 13 or more, the first one resting 

 on the basals ; vault depressed, opening 

 subcentral ; arms 30 to 72 or more ; col- 

 umn round. Type S. perumbrosus. 

 aeperrimus, Meek & Worthen, 1869, Proc. 

 Acad. Nat. Sci. Phil., p. 160, and Geo. 

 Sur. 111., vol. 5, p. 349, Burlington Gr. 



436. Strotocriiius regalis. 



111., vol. 2, p 



FIG. 437. Strotocrinua regalip. Diagram ,|J4 diam 



bloomfieldeneis, S. A. Miller, 1882, Jour. 

 Cin. Soc. Nat. Hist., vol. 2, p. 258, and 

 vol. 4, p. 76, Up. Burlington or Keo- 

 kuk Grf 



dilatatus, see Physetocrinus dilatatus. 



ectypus, Meek & Worthen, 1869, Proc. 

 Acad. Nat. Sci. Phil., p. 159, and Geo. 

 Sur. 111., vol. 5, p. 353, Burlington Gr. 



glyptus, Hall, 

 1860, (Actino- 

 crinus glyp- 

 tus,) Supp. to 

 Geo. Sur. 

 Iowa, p. 2, 

 Burlington 

 Gr. 



p e r u m brosus, 

 Hall, 1860, 

 (Actinocrinus 

 perumb ro- 

 sus,^ Supp. to 

 Geo. Sur. 

 Iowa, p. 7, 

 Burlington 

 Gr. 



regalis, Hall, 

 1860, (Actino- 

 crinus rega- 

 lis,) Supp. to 

 Geo. Sur. 

 Iowa, p. 8, 

 and Geo. Sur. 

 192, Burlington Gr. 

 umbrosus, Hall, 1858, (Actinocrinus um- 

 . brosus,) Geo. Sur. Iowa, p. 590, Burling- 

 ton Gr. 



SYNBATHOCRINUS, Phillips, 1836, Geol. York- 

 shire, pt. 2, p. 206. [Ely. syn, together ; 

 battos, depth; krinm,' lily.] Calyx 

 small ; arms large and of great length ; 

 basals 3 ; radials 2x5; azygous plates 1 

 2 or more ; 

 arms simple 

 and c om- 

 posed of 

 plates in sin- 

 gle series. 

 Type S. con- 

 icus. 



brevis, Meek 

 & Worthen, 

 1869, Proc. 

 Acad. Nat. 

 Sci. Phil., p. 

 68, and Geo. 

 Sur. 111., vol. 

 5, p. 439, 

 /. , /\ Burlington 



flf > Gr - 



V^S/ , d e n t a t u s , 

 Owen&Shu- 

 mard, 1852, 

 Geo. Sur. 

 Wis., Iowa, 



and Minn., FIG. 438. Synbatuocri- 

 p. 597, Bur- m ' 8 grauuliferus. An- 

 lingtonGr. Views. &nd posterlor 

 grant* latus, 

 Troost. Not defined, 

 granuliferus Wetherby, 1880, Jour. Cin. 

 Soc. Nat. Hist., vol. 2, p. 250, Wa- 

 verly Gr. 



matutinus, Hall, 1858, Geo. Sur. Iowa, p. 

 483,lHam. Gr. 



