ORINOIDEA. (IV, F.) 
Echin. 103 
(p. 481, pi. xlv) ; A. immaturus (olim Dorycr.) W. & Sp., redescr. 
(p. 471), A. parvibasis (olim Dorycr.) W. & Sp., redescr. (p. 473, 
pi. xlv); A. parvus (olim Actinocr. et Dorycr .) Shum., redescr., incl. 
A. symmetricus Hall, et D. amcenus S. A. Miller (p. 477, pi. xlv); 
A. radiatus (olim Dorycr .) W. & Sp., redescr. (p. 472, pi. xlv); A. 
spinosulus (olim Actinocr. et Dorycr.) Hall, redescr., incl. D. Icelloggi 
Worthen (p. 478, pi. xliii) ; A. subaculeatus (olim Actinocr. et 
Dorycr.) Hall, redescr. (p. 476, pi. xlv); Wachsmuth & Springer 
(336). 
Apiocrinidce , defined, includes Apiocr ., Guettardocr., Millericr., Acrochordocr ., 
Calamocr. ; Zittel (356) p. 140 ; Zittel-Eastman (357) p. 167. 
t Apiocrinus, base (pp. 60 & 61), tegmen (p. 117); Wachsmuth & Springer 
(336). — A. meriani , Tithonian, Bas-Languedoc ; Roman (281) pp. 88, 
331. — A. milleri; Schlueter (298) p. 496. — A. polycyphusl; Hug 
(133) p. 404. 
A. recubariensis, Muschelkalk, Recoaro; Crema (59) Atti 1st. Veneto, liv, 
p. 858, pi. ii : is a primitive Millericrinus ; Bather (27) : n. sp. 
t Archceocrinus, rediagnosed (p. 253) ; A. desideratus, redescr. (p. 257, pi. x) ; 
A. lacunosus , redescr. (p. 255, pi. x); A. microbasalis, redescr. (p. 256, 
pi. x); A. marginatum Bill., sp. referred back to Glyptocrinus (p. 254); 
A. pyriformis [errore pro piriformis ], redescr. (p. 255, pi. x) ; Wachs- 
muth & Springer (336). 
f Aristocrinus, validity of genus doubted ; Bather (24) p. 998. 
f Arthracantka, rediagnosed, incl. B'ystricrinus Hinde, validity of name 
and value of spines discussed ; Wachsmuth & Springer (336) p. 747. 
— A. ithacensis ; Kindle (161) p. 33 : redescr. ; Wachsmuth & Springer 
(336) p. 749, pi. lxxvi. — A. punctobrackiata, redescr., incl. Hystri- 
crinus carpenteri Hinde ; op. cit. p. 750, pi. lxxvi. 
A. depressa , Lower Chemung group, Steuben Co., N.Y. ; Wachsmuth 
& Springer (336) p. 751, pi. lxxvi : n. sp. 
Articulata ( = Neocrinoidea, P. H. Carp., Canaliculata, W. & Sp., Pentacri- 
nacea, Neum.), defined, includes families Encrinidce , Apiocrinidce , Bour- 
gueticrinidce , Evgeniacrinidce, ITolopidce, Plicatocrinidce , Saccocomidce, 
Pentacrinidce, Comatulidce ; Zittel (356) p. 139; Zittel-Eastman (357) 
p. 165: sensu Joh. Muller (p. 15), sensu J. S. Miller (p. 13), sensu 
W. & Sp. (p. 26), redefined (pp. 149, 151), sensu Zittel (pp. 23 & 24); 
Wachsmuth & Springer (336). 
Articulosa, nom. nov. pro Articulata sensu W. & Sp. non Mull. ; Wachsmuth 
& Springer (336) p. 153. 
fyl scocrinus vel AscocyUis, vide sub iv G. 
\Astrocs'inus Conrad, syn. of Melocrinus ; Wachsmuth & Springer (336) 
p. 292. 
Astylida C. F. Roem. ; Wachsmuth & Springer (336) p. 16. 
t Atelcstocrinus, arm-branching (p. 77), asymmetry (p. 159); Wachsmuth 
& Springer (336). 
f Aulocrinus, n. g. with genotype A. agassizi, Keokuk group, Indiana, with 
branching anal tube; Wachsmuth & Springer (336) p. 138, pi. vii, 
fig. 9 : n. sp. 
t Austinocrinus spp. ; Stolley (3201 pp. 247, 272. 
f Baerocrinus, compound radials ; Wachsmuth & Springer (336) pp. 72, 
158. 
f Balanocrinus subteres, Callovian (p. 65), Oxfordian (pp. 60, 65), Bas- 
Languedoc ; Roman (281). 
t Barrandeocrinidce, defined, includes only Barrandeocr. ; Zittel (356) 
p. 129, and Zittel-Eastman (357) p. 144. 
t Barrajideocrinus, rediagnosed and described from type-specimens of B. 
sceptrum, referred to Batocrinidce (p. 484, pi. viii), arms (p. 86); 
Wachsmuth & Springer (336). 
