ECHINOIDEA. 
Bch. 73 
P. grossouvrei , , between Bajocian and Bathonian, near Loudun, Maine- 
et-Loire, Cotteau, Mem. Soc. zool. France, vi, p. 344, n. sp. 
f Pedinopsis pondi, probably from the lower portion of the Austin chalk, 
Upper Cretaceous, Onion Creek, Travis Co., Texas, Clark, Bull. 
U. S. Geol. Surv., No. 97, p. 57, n. sp. 
f Peltastes : — P. clatliratus , Agass. sp., redescribed ; Schlueter (236) 
p. 148. P. cf. hcliophorus , Agass. sp., Senonian, Baltic provinces ; 
op. cit. p. 152. P.lardyi , Desor sp., redescribed, with varieties and 
ybung; Lambert (145) p. 76. P. meycri , Desor sp., and P.puncta- 
tm, Agass., referred to P. stellulalus , Agass. ; op. c*7. pp. 75 & 76. P. 
stellidatas, Agass. sp., redescribed ; Schlueter (236) p. 145. 
fPmVtsfrr australis, Gabb, see Jlemiaster texauus. 
f Peronella decagonalis , Lesson sp., New Guinea; Etheridge (76) 
pp. 692 & 697. 
Phormosoma , W. Thoms. ; Agassiz (3) pp. 79, 80, & 83, Bell (16) 
p. 143. P. placenta , W. Thoms. ; Bell (16) p. 144. P. uranus , 
W. Thoms. ; Bell (16) p. 145. 
Phyllacanthus baculosa , spines covered with algas ; Boutan (24) p. 53. 
*j*P. sindensis, Dune. & Slad., referred to Rhabdocklaris ; Cotteau 
( 44) p. 464. 
*1 P. tirsiger , Simonelli (245) p. 234, n. sp. 
f Phyllobrissus cerceleti , Desor sp., redescribed, and systematic position 
discussed ; Lambert (145) p. 84. 
•{■PAT/mosorna radiatum , Schl. ; Frig (89) p. 109. 
f Pithodia, see Discoides. 
Plagirclunus , Pomel, rejected ; Cotteau (44) p. 632. 
f Plagiochasma, Pomel, syn. of Trematopygus , d’Orb. ; Lambert (146) 
p. 69. 
f Plesiocorys, Pomel, rejected ; Lambert (146) p. 94. 
f Pleurocidaris regain, Goldf. sp., redescribed and discussed ; Schlueter 
( 236) p. 136. 
f Pliolampas meslei , Cott., Helvetian of Valduc ; Dep^ret (64) p. 448. 
f Polydiadema, discussed and defended ; Lambert (145) p. 48. P. bonei, 
Forbes sp., Upper Greensand, Warminster, distinguished from 
Tiarella michelini at same locality ; Lambert (145) p. 58. 
P. colteaui, Aptian, Grandpre ; Lambert, Bull. Soc. geol. France (3) xx, 
p. 54, n. sp. 
j* Porocidaris, Desor ; Agassiz (3) p. 80: defined and discussed; Cotteau 
( 44) p. 465. P. anomala , Dune. & Slad. ; Cotteau (44) p. 478. P. 
(?) lingualis , Desor, discussed; Schlueter (236) p. 134. P.pseudo- 
serrata, Cott. sp., redescribed ; Cotteau (44) p. 474. P. schmideli, 
Miinst. sp., redescribed; op. cit. p. 468. P. tuberculosa , Mich. ; op. cit. 
p. 478. 
P. cretacea , name doubtfully given to spine-fragment, Upper Senonian, 
Riigen, Schlueter, Abh. Preuss. geol. Landesanst. Heft. 5, p. 131, 
n.sp.(?) 
Pourtalesia ; Agassiz (3) pp. 77, 79, & 83, P. Jeffrey sii , A. Agass. ; 
Danielssen (62) p. 5. 
