ECHINOIDEA. (iV, C.) 
Echin. 67 
Paracentrotus descr. ; Delage (54) p. 243, fig. : diagnosis ; Meissner in 
Hamann (112) p. 1370. P. lividus ; Delage (54) p. 243. 
Parasalenia descr. ; Delage (54) p. 245 : diagnosis ; Meissner in 
Hamann (112) p. 1375. P. gratiosa^ compared with P. pohlii, pedi- 
cellariae ; de Meijere (57) p. 97, pi. xvii : pedicellariae, incl. P. 
pohlii, young, specimen recorded from Zanzibar, Bell 1903, is Stomo- 
pneustes variolaris ; Mortensen (195) p. 121, pi. v. 
Parasaleniinae ; Delage (54) p. 245. 
Paraster discussed ; Fourtau (83) p. 435. 
Parechininae ; Delage (54) p. 242. 
Par echinus descr. ; loc. cit., figg. : diagnosis ; Meissner in Hamann (112) 
p. 1368. P. microtuherculatus, P. miliaris ; Delage (54) p. 242. 
fPedina-, Delage (54) p. 233. P. are7iata (p. 170), P. gigas (p. 169); 
LissAJOUS (153). P. lithographica ; Walther (281) p. 167. P. sub- 
laevis ; Maire (178) : Lissajous (153) p. 169 : not typical form ; 
Lambert in Review. 
Pedinidae should include Pedina, Caeno-, Pseudo-, Micro-^ Leio-^ Echino-y 
Hemi-, Phymo-,k Palaeo-pedina, Mesodiadema^ Echinopsis^ DiademopsiSy 
HecistocyphuSy Orthopsis^ Miorthopsis, Gymnodiadema ; Mortensen 
(195) p.* 46. 
Pedininae defined with list of genera ; Delage (54) p. 233. 
iPedinothuria ; Delage (54) p. 235 : referred to Pseudodiadematidae ; 
Mortensen (195) p. 52. 
-[Pelanechinus descr. ; Delage (54) p. 224. 
iPeltastes : — P. dathratus ; Collet (44) p. 77. P. stellulatus ; Strang- 
WAYS (266). P. aff. stellulatus ; Zlatarski (299). Peltaster [sic] 
umbrella ; Fortin (81). 
Periaster ; Delage (54) p. 271 : distinguished ; Tornquist (268) p. 392. 
P. limicola not this genus ; loc. cit. : of Challenger Rep. pi. xxxv6, 
f. 1-4 is not this sp. ; Agassiz (3) p. 210. tP. oblongus vide sub 
Linthia. P. tenuis descr., compared with P. limicola & Hemiaster 
bufo ; Agassiz (3) p. 209, pis. ciii-cv. 
Peripatagus, — Perypatagus [sic] ; Delage (54) p. 271 : diagnosis ; 
Meissner in Hamann (112) p. 1391. 
iPerischodomus defined, synn. Perischocidaris, Homotoechus, Tretechinus 
(p. 18), P. biserialis descr. (p. 18), P. hartei descr. (p. 19), P. illinoiensis 
descr., P. magnus (p. 20) ; Klem (142). 
iPerischoechinidae defined as Suborder with Famm. Lepidocentrus-y 
Lepidesthes-y Archaeocidaris-y Melonites-^ & Tiarechinus-inae ; Delage 
(54) p. 217, 218. 
iPerischoechinoida defined ; Klem (142) p. 15. 
f Permocidaris ; Klem (142) p. 74. 
Peronella discussed, merged in Laganum (q. v.), P. pellucida ; DE 
Meijere (57) p. 130. 
-fPeroniaster nasutulus, vide sub Hemiaster. 
Petalocidaris vide sub Cidaris ; Delage (54) p. 227 : rejected ; Agassiz 
(3) p. 22. 
iPholidocidaris defined (p. 22), P. gaudryi (p. 23), P. irregularis incl. 
P. raeekiy descr. (p. 22), P. tenuis (p. 23) ; Klem (142). 
Phormosoma descr. ; Delage (54) p. 221 & fig. P. sp. ; Bell (22a). P. sp. 
(p. 32, pi. xii), P. alternans descr. (p. 31, pis. iii, xii), P. bursarium, young 
individuals, discussion of Agassiz' figures of young Phormosoma (p. 28) ; 
DE Meijere (57). P. hispidum descr., growth changes (p. 86, pis. a, b, 
xxx-xlix, also p. 76-79), P.panamense descr. (p. 101, figg.); Agassiz (3). 
P. placenta juv, descr. ; op. cit. p. 100, pis. xliii, xlviii : protechinus 
stage ; Mortensen (195) p. 54, fig. P. verticillatum n. sp., B. of 
Bengal, 678 fm. : Mortensen (194) p. 90, pi. iv, v. P. zealandiae 
n. sp., Challenger Station 169 = Asthenosoma gracile ? of Chall. Rep. ; 
Agassiz (3) p. 105, pi. li. 
