47 IS chin. 
Systematic, Echinoidea. 
1031 
Pygaster sens, str., Hawkins Proc. Zool. 
Soc. p. 451. 
fPlesiociclaroida, Jackson Phylogeny 
of Echini p. 205. 
IfPlesiolampas michelini, Lambert 
Ann. Univ. Lyon 1 p. 185. — f P. saharae, 
LeMoine Bui. Museum, Paris 1910 p. 
231. 
Pleurechinus doderleini , Jackson 
Phylogeny of Echini. 
Plcxccliinus chid, us, Jackson T.c. 
\Pliophyma section of Clypeaster , 
typo C. alias Poind, Lambert Abh. 
Scnweiz. Pal. Ges. 38 p. 90. 
Podocidaris ornata sp. n., Hawaii* 
Clark. JI. L., Mem. Mus. Comp. Zool. 34 
p. 381 pi. 
Podophora p. 376, P. atrata p. 376. 
P. pedifera p. 377, Clark, H. L., T.c. — 
P. pedifera , Clark, H. L., Bull. Mus. 
Comp. Zool. 62 p. 346, pi. xi lig. 2. 
t Polycyphus normannus, Jackson 
Phylogeny of Echini. — fP. deslong- 
chctmpei, Paris York, Proc. Geol. Polyt. 
Soc. 17 p. 214. 
Pordcidaris coibosi , milleri , Jackson 
Phylogeny of Echini. 
fP. p8eudo8errata Vocl. Foldt. lilvk. 
20 p. 74. 
f Porpitella doncieuxi, Lambert Ann. 
tJni v. Lyon 1 p. 178. 
Poixrtalesia Jeffrey si, Jackson Phylo- 
geny of Echini. 
f Praescutella degrangei , Lambert Bor- 
deaux Actes soc. linn, 66 p. 76. 
f Prenastcr monzensis ap. n. filocene, 
Monz, Lambert Ann. Univ. Lyon 1 p. 191 
pi. xvi figs. 20 & 21. 
Prionechinus p. 302, P. agassiz’d 
p. 308, P. chuni p. 304, P. depressus 
p. 309 pi., P. forbesianus p. 304, P. 
rilber p. 304 pi., P. sagittiger p. 304, 
P. 8cnlptii8 p. 306 pi., Clark H. L. Mem. 
Mus. Comp. Zool. 34. 
|P. jacquemeti, fP. tener, Lambert 
Abh. Schweiz. Pal. Ges. 38 p. 53. 
f Protcrocidaris pp. 208, 409, fP. 
giganteus p. 410 pi. lxv fig. 3, pi. lxvii 
figs. 4-7, Jackson Phylogeny of Echini. 
\Protocyamns Gregory rejected, as 
syn. of Discoidea , Hawkins Proc. Zool. 
Soc. 452. 
f ProtoechinUS p. 453, fP: anccps 
p. 454, Jackson PhylogCny of Echini.. 
P8ammechimi8 p. 242, P. microtuber- 
culatus , P. miliaris p. 244, Clark II. L. 
Mem. Mus. Comp. Zool. 34. 
fP. tongrianu8, T)t Stefani Boll. soc. 
geol. ital. 27 p. 443. 
fP. laqueatua sp. n. Langhien, Bassin 
du Rhone, Lambert Abh. Schweiz. Pal. 
Ges. 38 p. 54. — fP. cxtraalpinm sp. n., 
Miocene, Eggenburg, Schaffer Wien 
Abh. geol. RchsAnst. 22 p. 187 pi. lix 
figs. 7-10. 
Pseudoboletia p. 344, P. altantica, P. 
Indiana pi., P. maculala p. 345, Clark 
H. L. Mem. Mus. Comp. Zool. 34. — P. 
Indiana , Jaoksos Phylogeny of Echini. 
f Psendocidaria dieneri, Fourtau 
Mem. Inst, figypt 7 p. 43. 
\p8endodiadema p8eiidodiadeina,3 aok~ 
son Phylogeny of Echini — f P. sp., 
Unter Oxford, Popilany, Boden Geol. u. 
Pal. Abh. Jena 10 p. 75 pl.xxvii fig. 13. 
fP. humei sp. n. CenomRnien, figypte, 
Foortau Bull. Inst, figypt. 5 p. 139 pi. i 
fig. 1. 
■ \P8eudopedina lomesi, Richardson 
Geol. Mag. 9 p. 31 . 
\p8iloaoma Pomel, emend., p. 148 ; 
fP. conatrictum sp. n. Santonien p. 153 
pi. i fig. 5, figypte, Fourtau Bull. Inst. 
£gypt 5. 
f Pygaster subdivided, “ Plesiechinus ,’•* 
Pygaster s. str. and Macropygus , q.v., 
Hawkins Geol. Mag. 9 p. 10. — \Pygaater 
Agass. rediagnosed, with three subgenera, 
Pygaster sens, str., Megapygus, and 
Macropygus ; fP. semisulcatus is type of 
Pygaster sens, str., Hawkins Proc. Zool. 
Soc. p. 448. 
t Pygaster s. str. temporary Subgen. of 
Pygaster s. lat., dilatatus, macrocy- 
pliuS p. 11, tP- umbrella p. 11 pi. ii fig. 
2, Hawkins Geol. Mag. 9. — fP. cf. semi - 
sulcatus, Paris York Proc. Geol. Polvt. 
Soc. 17 p. 215. 
\Pygaateridae, redefined, with sub- 
families Pygasterinae and Pileinae, 
Hawkins Proc. Zool. Soc. p. 448. 
f Pygasterinae , subfam. nov. of 
Pygasteridae, Containing only Pygaster , 
Hawkins T.c. p. 448. 
