72 Echin. 
XIV. ECHINODERMA. 
M. (?) depresms , perhaps young of Gassidulus testudinarius ; Oppen- 
heim (210) p. 196. N. ( Cassidulus) elatus Forbes 1845, type ; Geol. 
Soc. London (101) p. 43. N. ovulum Eichw. 1871, referred to Cassi¬ 
dulus (p. 12) and to Micraster (p. 16); Semenow (258). N. ( Pygo - 
rhynchus) planatus and N. ( Pygorhynchus) testudo , types of Forbes 
1845 ; Geol. Soc. London (101) p. 43. N. truncatulus Eichw. 1871, 
referred to Ceratomus ; Semenow (258) p. 11. 
t Offaster, — 0. sp. ; Abich (1) p. 16. 0. pihda, op. cit. p. 15, pi. i: Reid 
(232) p. 2, and figg. 1-3 : Sherborn (260): of English Marsupite 
Chalk is not 0. corculum as supposed by Barrois ; Grossouvre (116) 
p. 276. 0. rostratus ; Abich (1) p. 15, pi. i. 0. sphaericus Schl., is an 
Echinocorys ; Lambert in Grossouvre (116) p. 971. 
\0ligoporus ,— 0. coreyi , descr. (p. 183), 0. dauae , descr. (p. 182, pi. xx), 
0. mutatus, descr. (p. 183, pi. xviii), 0. nobilis, descr. (p. 182), 0 parvus, 
descr. (p. 183) ; Keyes (151). 
rOol aster maltensis is an Echinocorys , allied to Galeola pyrenaica ; Lambert 
in Grossouvre (116) p. 971. 
t Oolopygus discussed ; Schlueter (252) p. 324 : Lambert in Savin (247) 
p. 7. 0. savini n. sp., Turonian, Montague des Comes (Aude), type in 
Coll. Savin ; Lambert, op. cit. p. 6, pi. iii. 
t Opissaster discussed ; Gauthier (96) p. 143: Lambert in Review. 
O. douvillei n. sp., Senonian, Kanepan, Persia; Gauthier (96; 
p. 141, pi. xx. 0. fourtaui n. sp. for specimens from Gebel Haridi, 
refd. by Fourtau to Ditremaster nux ; Lambert (161) p. 41. 0. 
morgani , large size, 4 genital pores ; Gauthier (96) p. 142, pi. xx. 
Vide etiam sub Ditremaster or Hemiaster. 
•\Oppenheimia gardinalei ; Oppenheim (210) p. 268. 
t Orthechinus cotteaui n. sp., Upper Senonian, Teng-e-Hiana, Persia; 
Gauthier (96) p. 152, pi. xx. Vide etiam sub Micropsis. 
t Orthopsis—0. miliaris, descr. (p. 52, pi. v), 0. perlata , var., p. 56, pi. v ; 
Kossmat (159). 0. repelliui , small specimen, distrib. ; Lambert 
(161) p. 12. 
t Oviclypeus lorioli ; Oppenheim (210) p. 188. 
t Palcteckinus, —P. burlingtonensis and P. gracilis , descr. ; Keyes (151) 
p. 180. P. sphaericus ; Hind (131) pp. 426, 427. 
Palaeopneustes.—iP. (?) conicus, generic reference discussed ; Oppenheim 
( 210) p. 221. P. hemingi, resemblance to P. cristatus ; Alcock (5) 
p. 168 and hg. 
f Parabrissus pseudoprenaster Oppenheim (210) p. 262. 
Parapygus Pomel, syn. of Bothriopygus ; Gauthier (96) p. 144. 
t Peltastes,—P. acantlioides ; Michalet (203) p. 579. P. archiaci ; Lam¬ 
bert (161) p. 13. 
t Pericosmus, —P. bastennensis , apical system figd, ; Checchia (41). P. 
douvillei n. sp., Upper Eocene, Mollali Ghiavan, Persia ; Gauthier 
( 96) p. 169, pi. xxii. P. montevialensis , descr., incl. specimen referred 
to P. spatangoides by Airaghi (4) Zool. Rec. 1899; Airaghi (3) p. 384 : 
distinguished from P. spatangoides , perhaps incl. P. marianii Airaghi, 
P. callosus Manz., and Periaster capellinii Laube ; Oppenheim (210) 
p. 255. P. nicaisei n. var. excelsa , Upper Eocene, Mollah Ghiavan, 
Persia ; Gauthier (96) p. 167, pi. xxiii. P. spalatinus n. sp., Eocene, 
Botticelle, Dalmatia ; Martelli (193) p. 94, pi. vii. P. spatangoides ,. 
descr. ; Checchia (40) p. 68, incl. Spatangus suborbicidaris Quenst 
and Macropneustes schweinfurthi May.-Eym. ; Oppenheim (210) p. 254, 
pi. vii. 
t Perischodomus illinoisensis , discussed, genus doubtful; Keyes (151) 
p. 191. 
Phalacrocidaris n. g. of Leiocidarinae , with genotype Stereocidaris 
japonica Doed., and comprising P. grandis (Doed.), P. sceptriferoides 
