226 



ECHINODERMA TA. 



[AST.— BAR. 



callosus, Hall, 1859, Pal. N. Y., vol. 3, p. 

 123. Low. Held. Gr. 



digitatus, Hall, 1859, Pal. N. Y., vol. 3, 

 p. 123, Low. Held. Gr. 



scutelliformis, Hall, 1859, Pal. N. Y., vol. 

 3, p. 122, Low. Held. (Jr. 

 Asterias, Lamarck, 1815, Hist. Nat. Anim. 

 sans Vert. Not Palaeozoic. 



anthonyi, see Paheaster jamesi. 



antiqiia, see Palaeaster antiqua. 



antiquata, see Pala*aster antiquata. 



matittina, see Paleeaster matutina. 

 Asterocrinus, Lyon, 1857, Geo. Sur. Kv., 

 vol. 3. This name was preoccupied by 

 Munster. See Pterotocrinns. 



capitalis, see Pterotocrinus capital is. 



coronarius, see Pterotocrinus coronarius. 

 Astrios, Troost, 1850, Catalogue. Not de- 

 fined. 



tennemese, Troost, 1850. Not defined. 



C w 



Fig. i!51.— Barycrluus wachsmutlii. Diagram 



Astrocrinites, Conrad in Catalogue Ann. Geo. 

 Rep., 1840-'41. This name was pro- 

 posed, but not defined; moreover it was 

 preoccupied. 



pachydadyhiK, see Mariacrinus pachydac- 

 tylus. 

 Astylocrinus, Roemer, 1854, Leth. Geo., p. 

 229, syn. for Agaesizocrinus. 



Isevis, syn. for Agassizocrinus dactyli- 

 formis. 



Ataxocrinw, Lyon, 1869, syn. for Ano- 

 malocrinus. 



caponiformit, see Anomalocrinus caponi- 

 formis. 

 Ateleocystites, Billings, 1858, Can. Org. Rem., 

 Decade 3, p. 72, syn. for Anomalocys- 

 tites. 



huxleyi, see Anomalocystites huxleyi. 

 Atelestocrinus, Wachsmuth & Springer, 

 1886, Rev. Pal., pt. 3, p. 221. [Ety. 

 atelestos, incomplete ; krinon, lily.] Calyx 

 elongate, bell-shaped, sides concave, 

 restricted along the suture between 



basals and subradials; basals 5; sub- 

 radials 5; long, narrow, irregular; 3 

 hexagonal, 2 heptagoual ; azygous 

 radial, non-arm bearing, the other four 

 supporting each from 2 to 5 brachials ; 

 the eight arms give off branching arm- 

 lets ; azygous plate large, resting upon 

 two subradials; column pentangular. 

 Type A. delicatus. 

 delicatus, Wachsmuth & Springer, 1886, 

 Rev. Pal., pt. 3, p. 223, Burlington Or. 

 robustus, Wachsmuth & Springer, 1886, 

 Rev. Pal., pt. 3, p. 223, Burlington or 

 base of Keokuk Gr. 

 Balanocrinus, Troost, 1850. This name was 

 preoccupied. See Lampterocrinus. 

 inflahu, see Lampterocrinus inflatus. 

 Barycbinus, Wachsmuth, 1868, Proc. Acad. 

 Nat. Sci., p. 338. [Ety. barns, heavy; 

 krinon, lily.] Distinguished from 

 Cyathocrinus by be- 

 ing more robust, 

 having thicker 



{)lates, and a shal- 

 ower cup; there 

 are usually two azy- 

 gous plates, while in 

 Cyathocrinus there 

 is never more than 

 one; there are never 

 more than two 

 brachials, and these 

 are shorter and wider 

 than in Cyathocri- 

 nus; the arms are 

 shorter, heavier, and 

 have narrower 

 grooves; the column 

 is stouter; subpen- 

 tagonal and longi- 

 tudinally live partite, 

 with a highly or- 

 ganized central ca- 

 nal. Type B. an 



gulatus. 



angulatus, Meek A 

 Worthen, 1860, (Cyathocrinus angu- 

 latus,) Proc. Acad. Sat. Sci. Phil., p. 

 391, and Geo. Sur. 111., vol. 2, p. 284, 

 Keokuk Gr. 



bullatus. Hall, 1858, (Cyathocrinus bul- 

 latus,) Geo. Sur. Iowa, p. 624, Ke- 

 okuk Gr. 



cornutus, Owen & Shumard, 1850, (Cy- 

 athocrinus cornutus,) Jour. Acad. Nat. 

 Sci., 2d ser., vol. 2, p. 63, and Geo. Sur. 

 Wis., Iowa, and Minn., p. 591, Burling- 

 ton Gr. 



crassibrachiatus, Hall, 1860, (Cyathocrinus 

 crassibrachiatus,) Sup. to Geo. Sur. 

 Iowa, p. 60, Keokuk Gr. 



geometricus, Meek & Worthen, 1873, Geo. 

 Sur. 111., vol. 5, p. 485, Keokuk Gr. 



herculeus, Meek & Worthen, 1868, Proc. 

 Acad. Nat. Sci. Phil., p. .541, and Geo. 

 Sur. 111., vol. 5, p. 485, Keokuk Gr. 



hoveyi, Hall, 1861, (Cyathocrinus hoveyi,) 

 Desc. New Crin., p. 5, and Geo. Sur. 

 111., vol. 5, p. 486, Keokuk Gr. 



