84 Echin. 
XIV. ECHINODERMA. 
discussed by Lambert (p. 214), P. laeviuscula (p. 210, pi. iii), P. 
matheyi , descr. with radiole (p. 209, pi. iii), P. pilleti (p. 216), P. 
platy spina (p. 217), P. revili n. sp., Urgonian, Gresy-sur-Aix, Savoy, 
oased on radioles, Mus. Chambdry (p. 217, pi. ii), P. zschoskkei [sic] 
(p. 208); Savin (283). 
t Plesiolampas, sp. nondescr. ; L apparent (181). 
Plesiozonus n. g. of Spatangidae Adetinae , with genotype P. hirsutus 
n. sp., Malay Archipelago, 521 m. ; de Meijere (53) p. 12. 
Pleurechinus , diagnosed; Meissner in Hamann (125) p. 1363: contrasted 
with Temnopleurus, contains spp. P. bothry aides, fully descr., P. 
ruber , and P. variabilis , all figd. and measured ; Doederlein (62) 
p. 705, pi. lxi. 
Podocidaris diagnosed ; Meissner in Hamann (125) p. 1361. 
t Polycidaris, diagnosed as s.-g. of Cidaids, P. legayi ; Savin (283) 
p. 221. 
t Polydiadema, diagnosis (p. 189), P. complanatum (p. 191), P. lenticulatum 
(p. 190), P. marnillanum (p. 191), P. neglectum (p. 190), P. rhodani 
(p. 192) ; Savin (283). 
Porocidaris , s.-g. of Gidams q. v. ; Doederlein (62) : rediagnosed with 
type P. purpurata [inadmissible as genotype ; genus founded on 
fossil spp.] ; Mortensen (229) pp. 30, 21 : diagnosed ; Meissner in 
Hamann (125) p. 1349. P. elegans , pedicellariae descr., genotype of 
Histocidaris (pp. 21, 30), P. gracilis Slad., young of P. purpurata 
(p. 21), P. gracilis Doederl., pedicellariae descr., not this genus 
(p. 23), P. incerta, pedicellariae figd., not this genus (p. 23, pi. viii), 
but ? Stereocidans (p. 27) ; Mortensen (229). P. maculicollis 
n. sp., Malay Archipelago, 69-94 m. ; de Meijere (53) p. 1. 
+P. prior n. sp., Uppermost Daman, Thebes, radiole fragment 
only ; Oppenheim (240) p. 451, pi. vii : Fourtau considers this 
= P. schmideli , but the author does not agree ; Oppenheim in • 
Erratum. P. purpurata , inch P. gracilis Slad., pedicellariae and 
radioles descr. (p. 41, pis. vi, viii, x, xi), n. var. talismani , R. Ouro, 
1439 m., holotype Mus. Hist. Nat. Paris (p. 173); Mortensen 
( 229). t P. schmideli ; Ball & Beadnell (9) p. 59 : coronal fragment 
of large individual descr. ; Checchia (30) p. 102, pi. v. P. sharreri , 
discussed and distinguished from Stereocidaris ingolfiana and Doro- 
cidaris micans ; Mortensen (229) p. 22. 
Pourtalesia jeffreysii ; Michailovskij (223) p. 524. 
\Prenaster : — P. boninensis n. sp., Eocene of Bonin Is. ; Loriol (200) 
p. 35, pi. iii : “ differe de tous les Prenaster connus, et semble le type 
d’un genre nouveau... des Prospatangidae v ; Lambert in Review : loc. ; 
Tokunaua (306) p. 23. Prenaster excentricus Wright, probably a 
Heterobrissus ; Lambert (174) p. 81. 
Prionechinus sagittiger , Agassiz’ description corrected from the type- 
specimens, of which that from Challenger stat. 207 is not this genus ; 
Mortensen (229) pp. 82, 177, pi. vii. 
Prospatangidae , fam. comprises Asterostominae and Loveninae ; Lambert 
( 176) p. 23. 
iProtechiiius paucituberculatus ; Noetling (238) p. 517. 
Psammechinus, diagnosis ; Savin (283) p. 156 : restricted, with genotype 
E. variegatus Lam., and comprising P. semituberculatus oxidverruculatus 
(pp. 108, 114), diagnosis as member of Schizechininae , inch Lytechinus, 
Psilechinus, Schizechinus (p. 136) ; Mortensen (229). tP. hiselyi ; 
Antule (7) p. 22. f P. iheringi ; Tournouer (310) pp. 466, 467 : 
additional notes ; Loriol (200) p. 14, ph i : slight differences from 
type; Lambert (177) pp. 474 & 477, ph xv. tP. lahillei n. sp., 
Patagonian of Cabo Curioso ; Lambert (177) pp. 475 & 477, ph xv : 
Todrnouer (310) p. 471. P. microtuberculatus ; Guenther (121) : 
