CRINOIDEA. (tv, f.) Echin. 121 
with P. mulleri, P. sowerbyi , & P. gastaldi; Loriol (194) Bull. Soc. 
geol. France (3) xxv, p. 127, pi. iv : n. sp. 
Pentamera Ang. ; Wachsmuth & Springer (336) p. 31. 
\ Periechocrinites ; Wachsmuth & Springer (336) pp. 362, 366. 
t Per iechocr inns, rediagnoscd, inch Trochocr. Portlock, ? Pradocr. Verneuil, 
Geocr. d’Orb., Saccocr. Troost-Hall, Pyxidocr. (pars) Muller (p. 519), 
stem-lumen (p. 46); Wachsmuth & Springer (336). — P. howardi 
(olim Saccocr.), S. A. Miller, redescr. (p. 529) ; P. infelix (olim 
Megistocr. et Saccocr .) Winch. & Marcy, redescr., inch Saccocr. egani 
S. A. Miller (p. 525, pi. 1) ; P. marconanus (olim Megistocr. et 
Saccocr .) Winch. & Marcy, redescr. (p. 523, pis. 1 & li) ; P. necis, redescr. 
(p. 524, pi. 1); IP. ornatus (olim Saccocr.) Hall, redescr., inch 
S. benedicti S. A. Miller (p. 527, pis. 1 & li); P. speciosus , redescr. 
(p. 521, pi. 1); P. tenncsseensis (olim Saccocr.) Hall, redescr-., inch 
S. speciosus Rocm. non Hall (p. 528, pi. 1) ; ? P. tenuidiscus , redescr. 
(p. 531, pis. xlvi, li); P. urniformis (olim Saccocr.) S. A. Miller, redescr. 
(p. 526, pi. 1) ; ? P. whitei , redescr., inch Actinocr. amplus M. & W. 
(p. 530, pis. xlvi, li) ; P. whitjieldi (olim Saccocr.) Hall, redescr., inch 
Actinocr. christyi Hall non Shum. (p. 522, pi. li), arm-branching 
(p. 75); Wachsmuth & Springer (336). 
t Periglyptocrinus, n. g., with genotype P. billingsi , Trenton limestone, 
Ottawa, Canada ; Wachsmuth & Springer (336) p. 277, pi. xxi i arms 
(p. 80) : n. sp. 
P. prisons (olim Glyptocrinus) Bill., redescr. ; Wachsmuth & Springer 
(336) p. 278, pi. xxi. 
t Petalocrinidce, n. fam. (not defined) for Petalocrinus , n. g. (not diagnosed) 
with genotype P. mirabilis (p. 167), also P. (?) major (p. 170), both 
from Niagara limestone [near Monticello], Jones Co., Iowa; Weller 
& Davidson (341) J. Geol. iv, with figg. : n. spp. 
t Phialocrinus Trautschold non Eichw., ? = Graphiocr. ; Wachsmuth & 
Springer (336) p. 80. 
t Phillipsocrinus M’Coy, an abnormal Actinocrinoid ; Wachsmuth & 
Springer (336) p. 294. 
\Phimocrinus, anal tube; Wachsmuth & Springer (336) p. 136. 
t Phyllocrinits patellceformis ; Kilian (157) p. 682. 
+ Physetocrinus, rediagnosed (p. 593), arms (p. 85), tegmen (pp. 109, 120, 
pi. v) ; Wachsmuth & Springer (336). — P. asper, redescr. (p. 596, 
pi. lxiii) ; P. copei, redescr. (p. 598, pi. lxiii) ; P. dilatatus , redescr. 
(p. 595, pi. lxiv) ; P. ornatus, redescr., inch Actinocr. senarius Hall 
et A. brittsi S. A. Miller (p. 597, ph lxiii) ; P. ventricosus , redescr., 
inch varr. subventricosus McChesney, cancellatus Hall, internodius Hall, 
reticulatus Hall (p. 593, pis. lxiii & lxiv); Wachsmuth & Springer 
(336). 
P. lobatus, Lower Burlington age, Lake Valley, New Mexico; Wachsmuth 
& Springer (336) p. 599, ph lxiii. — P. sampsoni, Burlington group, 
Sedalia, Mo. ; Miller & Gurley (234) Bull. Illinois Mus. x, p. 14, 
ph i : n. spp. 
Pinnastella T. & T. Austin; Wachsmuth & Springer (336) p. 16. 
Pinnata , suborder of Articulata, defined; Wachsmuth & Springer (336) 
p. 152. 
+ Pisocrinidce, defined, includes Pisocr. and Triacr. ; Zittel (356) p. 125, and 
Zittel-Eastman (357) p. 135. 
\Pisocriims, base (p. 57), compound RR (p. 72), anal tube (p. 136) ; 
P. pilxda, orals (p. 90); Wachsmuth & Springer (336). 
t Platycrinidcv, Silurian and Devonian genera discussed, origin of the 
family; Bather (30) p. 338: relation of arms to cup (p. 83), origin 
of fam. (p. 167), redefined, analysis and distribution of genera (p. 642) ; 
: Wachsmuth & Springer (336) : defined, includes Platycr., Marsupiocr., 
