Echin. 117 
CRINOIPEA. (iy, F.) 
Hyocrinus , base (pp. 58, 63), arm-branching (p. 78), orals (p. 99, pi. iii); 
Wachsmuth & Springer (336). 
\Hypanthocrinus , syn. of Eucalyptocr. ; Wachsmuth & Springer (336) 
p. 335. 
Hypascocrinoidea Neumayr (p. 29), criticised (p. 148); Wachsmuth & 
Springer (336). 
t Hypocrihus, vide sub iv g. 
+ Ilyptiocrinus, rediagnosed (p. 200), and II. typus (syn. Cyphocrinus gorhyi 
S. A. Miller), redescr.; Wachsmuth & Springer (336) p. 201, pi. xix. 
t Ilystricrinus et II. carpenteri = Arthracantha et A. punctobrachiata 
[qq. v.]; Wachsmuth & Springer (336) pp. 748, 751. 
Ichthyocrinacea Neumayr; Wachsmuth & Springer (336) p. 29. 
\Ichthyocrinidce , separated from Taxocrinidce ; Jaekel (144) p. 47: stem 
(p. 40), tegmen (p. 113); Wachsmuth & Springer (336): defined, in- 
cludes lchthyocr ., Lecanocr ., Ilomalocr ., Anisocr., Calpiocr ., Cyrtidocr., 
Pycnosaccus, Lithocr., Taxocr ., Forbesiocr ., Onychoc r., Mespilocr . ; 
Zittel (356) p. 137, & Zittel-Eastman (357) p. 163. 
t Ichthyocrinus, base (p. 58), arm-branching (p. 77), articulation of arms 
(p. 87); Wachsmuth & Springer (336). 
+ Idiocrinus, rediagnosed (p. 202), and I. elongatus (syn. Gazacrinus in- 
ornatus S. A. Miller), redescr. (p. 203, pi. xviii); (?) I. immaturus 
(dim Thysanocrinus) Hall (p. 206, pi. xviii) ; (?) I. tennesseensis (olim 
Centrocrinus) Worthen, redescr. (p. 206, pi. xviii); Wachsmuth & 
Springer (336). 
I. ventricosus, Upper part of Niagara group, near St Paul, Ind., oral 
pyramid previously described as tegmen of Pisocrinus ; Wachsmuth 
.& Springer (336) p. 205, pi. xviii : n. sp. 
\lmpinnata, sub-order of Articulata , defined; Wachsmuth & Springer 
(336) p. 152. 
Inadunata W. & Sp. (p. 26), redefined (pp. 149 & 150); Wachsmuth & 
Stringer (336). 
Inarticulata J. S. Miller ; Wachsmuth & Springer (336) p. 13. 
t locrinuSy relations to Merocrinus (p. 68), compound RR (p. 71), arm- 
branching (p. 78), anal sac (p. 158), anals (pp. 126 & 127) ; Wachsmuth 
& Springer (336). 
t Lampterocrinus, rediagnosed, L. injlatus Hall and L. parvus, not recognised 
(p. 207); L. tennesseensis, redescribed (p. 208, pi. xiii); Wachsmuth 
& Springer (336;. 
Larviformia W. & Sp. (p. 26), redefined (p. 150), include Haplocrinidce , 
Pisocrinidce , Symbathocrinidce , Cupressocrinidce (p. 157); Wachsmuth 
& Springer (336): (= Inadunata larviformia W. & Sp., and Ilaplo- 
crinacea Neumayr), defined, includes families Haplocrinidce , Cocco- 
crinidce , Stephanocrinidce , Pisocrinidce , Symbathocrinidce , Cupresso- 
crinidce', Zittel (356) p. 124, see also Zittel-Eastman (357) p. 134. 
+ Lecanocr inus, position of mesentery and gut; Jaekel (142) p. 30: base; 
Wachsmuth & Springer (336) p. 58. — L. billingsi, anals, and L. 
macropetalus, anals and interbrachials ; Wachsmuth & Springer 
(336) p. 139. 
L. greenei , Niagara Group, Louisville, Ky. ; Miller & Gurley (232) Bull. 
Illinois Mils, viii, p. 52, pi. iii : n. sp. 
Liberia T. & T. Austin ; Wachsmuth & Springer (336) p. 16. 
\Lobocrinus , n. g., with genotype L. nashvillce [syn. ac Uperocrinus , melius 
HyperocrinusV, Wachsmuth & Springer (336) p. 434. — L. cequi- 
brachiatus (olim Actinocr. et Batocr.) McChesney, redescr. (p. 440, 
pis. xxix, xlvi), var. asteriscus (olim Batocr. asteriscus M. & W.), 
redescr., incl. var. alatus Hall (p. 441, pi. xxix); L. injlatus (olim 
Batocr .) Rowley & Hare, redescr., incl. B. bidbosus R. & H. (p. 444, 
pi. xxxiv), (?) L. hageri (olim Actinocr. et Batocr.) McChesney, redescr. 
1897. [Vol. xxxiv.] e 27 
