ASTER0IDE5A. (IV, D.) Echin. 91 
nung zur Paloeaster hochst zweifelhaft” ; Ludwig. — 17 spp. of Cin- 
cinnati group redescr. ; James (146) pp. 126-133. 
P. longimanus, Pilton Beds, Devonshire; Whidborne (342) P. Geol. Ass. 
xiv, p. 376, no fig. : n. sp. 
* \Palasterina approximata & P. speciosa refd to Paloeaster ; James (146) 
p. 135. 
Palmipes, rediagnosed ; Perrier (263) p. 42 : rediagnosed with special refer- 
ence to Mediterranean genera; Ludwig (209) p. 298 & (210) p. 243. — 
P. lobianci—P . membranaceusY Aster ina gibbosa , 90 m., Grotto of 
Capri, external description, gonads, interbrachial septa; Ludwig (210) 
p. 267; pi. v. — P. membranaceus ; Koehler (163) p. 446, and (164) p. 47 : 
B. of Biscay ; Perrier (263) p. 42 : synonymy, diagnosis, external de- 
scription, measurements of old and young, colour, geogr. and bathy- 
metric distrib., food, breeding-period, anatomical notes; Ludwig (210) 
p. 243, pis. v, viii : diagnosis, with bastard P. lobianci ; Ludwig (209) 
p. 298. — P., sp., colour- variation ; Saville-Kent (290) p. 243. 
P. sarasini , Trincomali (Ceylon), allied to P. pellucidus; Loriol (196) • 
Mem. Soc. Geneve, xxxii, p. 11, pi. i: n. sp. 
Pararcliasterinoe, rediagnosed ; Perrier (263) p. 47. 
Paxillosa , rediagnosed ; Perrier (263) p. 47. 
Pedicellaster , rediagnosed (p. 20); P. parvulus, Newfoundland, redescribed 
(p. 21); Perrier (263). 
Pedicellaster idee, rediagnosed ; Perrier (263) p. 20. 
Pentaceropsis obtusatus; Doederlein (69) p. 310. 
Pentaceros grayi; Pfeffer (267) p. 47. — P. muricatus, colour; loc. cit . — 
P. turritus ; Doederlein (69) p. 309. 
Pentagonaster , rediagnosed; Perrier (263) p. 45: diagnosis and key to 
Mediterranean spp. ; Ludwig (209) p. 293 : rediagnosed with special 
reference to Mediterranean genera, and key to the two spp. ; Ludwig 
( 210) p. 157. — P. australis , colour-variation ; Saville-Kent (290) 
p. 243. — P. balteatus and P. concinnus of Sladen, possibly identical 
with P. hystricis ; Ludwig (203) p. 55, and (210) pp. 186 & 187. — P. 
crassus , B. of Biscay; Perrier (263) p. 45. — P. gosselini , Azores, 
five variations in marginals and adambulacral spines; loc. cit. — P. 
granulans ; Sutton (322) : Azores ; Perrier (263) p. 45 : specific 
characters discussed, Bell’s (1892) description criticised ; Ludwig 
( 210) p. 180, footnote. — P. greeni Bell,? syn. of P. hystricis ; op. cit. 
p. 185. — P. hystricis , diagnosis; Ludwig (209) p. 294: synonymy, dia- 
gnosis, external description, measurements of old and young, colour, 
geogr. and bathymetric distrib. ; Ludwig (210) p. 179, pi. viii. — P. 
mirabilis Perrier = P. placenta ; op. cit. pp. 176, 451. — P. perrieri ; 
Koehler (163) p. 451, and (164) p. 60. — P. placenta , diagnosis; Lud- 
wig (209) p. 294 : treated similarly to P. hystricis , also with anato- 
mical notes ; Ludwig (210) p. 157, pis. v, vii : first found in B. of Biscay, 
growth-stages of madreporite; Koehler (163) p. 454, and (164) p. 66. 
P. lcergroheni , 1710 metres, B. of Biscay, 6° 52' W., 46° 34' N., allied to 
P. concinnus , P. balteatus , and P. hystricis ; Koehler (163) Rev. biol. 
Nord France, vii, p. 453, and (164) Ann. Univ. Lyon, xxvi, p. 63, 
figg. 8-10: syn. of P. hystricis ; Ludwig (203) p. 55, and (210) pp. 179, 
188. — P. minor , 400-500 metres, B. of Biscay, 6° 58' W., 46° 40' N. ; 
Koehler (163) Rev. biol. Nord France, vii, p. 451, and (164) Ann. 
Univ. Lyon, xxvi, p. 61, figg. 5-7: young of P. placenta ; Ludwig 
( 203) p. 55, and (210) p. 176 : n. spp. 
Pentagonasteridce, rediagnosed ; Perrier (263) p. 44. 
■\Petraster & P, wilberanus\ James (146) p. 134. 
Plutonaster , rediagnosed; Perrier (263) p. 48: diagnosis, key to Medi- 
terranean spp. ; Ludwig (209) p. 288 : rediagnosed, with special refer- 
ence to Mediterranean genera, and key to the two spp. ; Ludwig (210) 
