124 Eohin . xiv. echinodekma. 
t Porocrinus, considered as link with Cystids (p. 146) : related to Hybo- 
crinus (p. 67); Wachsmuth & Springer (336). 
t Poteriocrinoidea T. & T. Austin ; Wachsmuth & Springer (336) p. 16. 
t Poteriocrinidce, tegmen ; Wachsmuth & Springer (336) p. 116: defined, 
includes Poteriocr . (subgenn. Scaphiocr., Hvdriocr ., Scytalocr ., De- 
, cadocr.), Woodocr ., Zeacr ., Ccelioor ., Hydreionocr ., Tribrachiocr ., 
Cromyocr., Agassizocr ., Qraphiocr ., Bursacr ., Phialocr ., Ceriocr ., 
PEsiocr., Delocr., Ulocr., Erisocr., Stemmatocr. ; Zittel (356) p. 136 : 
many separated as Encrinidce ; Zittel-Eastman (357) p. 160. 
t Poteriocrinus, not typical of Poteriocrinidce (p. 87), anals (p. 126), anus 
(p. 137); Wachsmuth & Springer (336). — A clarkei , var. alpha, 
and P. Cornell ianus ; Kindle (161) p. 34. — P. crassus, redescr. from 
various localities, Central France; Julien (151) p. 138, pi. xvii. — P. 
(Decadocrinus) gregarius ; Kindle (161) p. 34. — P. labyrinthicus 
(olim Cyathocr.) S. A. Miller, anal area now first described ; Miller 
& Gurley (233) p. 34, pi. iv. — P. missouriensis , arm-branching; 
Wachsmuth & Springer (336) p. 78. — P. plicatus , from La Varville ; 
Julien (151) p. 138, pi. v. — P. radiatus , La Varville, determined by 
De Koninck; Julien (151) p. 137. — P. spissus , redescr. from La 
Varville, determined by De Koninck ; loc. cit.—P. stellaris ; Beyer 
( 38) p. 89, pi. iii, fig. 71. — P. (Decadocrinus) zethus ; Kindle (161) p. 34. 
P. albersi, Kaskaskia Group, Monroe Co., 111.; Miller & Gurley (233) 
Bull. Illinois Mus. ix, p. 29, pi. ii. — A arrectarius , St. Louis Group, 
Alton, 111. ; op. cit. p. 33, pi. iv. — P. bathed , Pilton Beds, Devonshire ; 
Whidborne (342) P. Geol. Assoc, xiv, p. 377, no fig. — P. bozemanensis , 
Lower Carboniferous, Bridger mountains, Bozeman, Mont. ; Miller 
& Gurley (234) Bull. Illinois Mus. x, p. 82, pi. v. — P. douglassi, ibid.-, 
op. cit. p. 83, pi. v. — P. lautus , Keokuk Group, Boonville, Mo. ; 
Miller & Gurley (233) Bull. Illinois Mus. ix, p. 30, pi. ii. — P. 
neglectus, ibid.; op. cit. p. 31, pi. iv. — P. pulaskiensis , Kaskaskia 
Group, Pulaski Co., Ky. ; Miller & Gurley (232) Bull. Illinois Mus. 
viii, p. 39, pi. iii. — P. stadiodactylus , Pilton Beds, Devonshire; Whid- 
borne (342) P. Geol. Ass. xiv, p. 377, no fig. — P. tensus , ibid . ; loc. cit. 
no fig. : n. spp. 
f Pterotocrinus, rediagnosed, inch Asterocr. Lyon non Miinst. (p. 791), arms 
and branching (pp. 77, 79), their relation to cup (p. 83), tegmen (p. 112); 
Wachsmuth & Springer (336). — P. acutus , redescr., incl. A spatu- 
latus Wetherby, et ? P. rugosus Ly. & Cass. (p. 799, pi. lxxix) ; var. 
bifurcatus (p. 801, pi. lxxix) ; P. capitalis , redescr. (p. 794, pi. lxxix), 
P. chesterensis, redescr. (p. 802, pi. lxxix) ; P. coronarius , redescr. 
(p. 795, pi. lxxix) ; P. crassus , redescr. (p. 801, pi. lxxix) ; P. depressus , 
redescr. (p. 796, pi. lxxix) ; P. pyramidalis, redescr. (p. 798, pi. lxxix) ; 
Wachsmuth & Springer (336). 
t Ptychocrinus; James (146): emended and diagnosed; Wachsmuth & 
Springer (336) p. 197. — P. parvus (including A angularis and 
Reteocrinus gracilis ), redescr. (p. 199, pi. xviii) ; P. priscus , referred 
to Periglyptocrinus (q. v.) (p. 198); A. splendens , redescr. (p. 198, 
pi. xviii); Wachsmuth & Springer (336). 
Pycnocrinidtes Pictet; Wachsmuth & Springer (336) p. 18. 
t Heteocrinidce, defined, with analysis of genera, & discussion; Wachsmuth 
& Springer (336) p. 173: defined; Zittel-Eastman (357) p. 144. 
t Reteocrinus; James (146): defined and discussed (p. 176), base (p. 67), 
tegmen (p. 120); Wachsmuth & Springer (336). — R. cognatus, 
probably large R. onealli (p. 177); R. Jimbriatus, redescr. (p. 179, 
pi. ix); R. gracilis Wetherby, syn. of Ptychocr. parvus (pp. 177, 200); 
R. magnificus, redescr. (p. 181, pi. ix); R. nealli (~ onealli), redescr., 
interradials discussed (p. 179, pi. ix); R. stellaris, redescr. (p. 178, 
pi. ix), arm-branching (p. 77); Wachsmuth & Springer (336). 
