HOLOTHURIOIDEA. (IV, B.) Echili. 63 
Protankyra , diagnosis, P. abyssicola , sclerites descr. ; Perrier (254) 
p. 538. 
Pseudocucumis mixta ; Ostergren (244) p. 24. 
Pseudostichopus , revised diagnosis (p. 332) table of spp. (p. 338), P. 
atlanticus R. Terr. 1898, between Azores and France, 4060 rn., redescr. 
(p. 333, pi. xvii) ; Perrier (254). P. villosus ; Albert Honors (5) 
p. 212 : parasite; Richard (271) p. 66. 
Psolinae, n. subfam. of Cucumariidae , comprises Psolus , Psolidium , 
and Theelia ; Perrier (254) pp. 493, 512. 
Psolus fabricii ; Michailovskij (223) p. 521 : specimens so recorded 
refd. to P. phantapus and P. japonicus ; Ostergren (244) p. 24. 
P. nummularis R. Perr. 1899, off Morocco, 1050 m., descr., sclerites 
figd. ; Perrier (254) p. 512, pi. xxii. P. phantapus ; Lonnberg (197) 
p. 24 : Michailovskij (223) pp. 468, 521 : Nichols (236) p. 244 : 
Norman (239) p. 411 : Ostergren (244) p. 10 : Simpson (294) p. 39. 
P. squamatus , most, if not all, specimens recorded from Arctic and 
Subarctic are P. phantapus or P. fabricii ; Ostergren (244) p. 10. 
Psychropotes , diagnosis and list of spp. (p. 444), P. buglossa E. Perr. 1886, 
descr. (p. 445, pis. xiii, xx), P. fucata R. Perr. 1896, betw. Azores and 
France, 4165 m., descr. and sclerites figd. (p. 453, pi. xx) ; PerrieR 
(254). P. kervillei ; Richard (271) p. 66. 
Psycliropotidae n. fam., comprising Benthodytes , Psychropotes , Euphronides , 
and Psycheotrephes ; Perrier (254) p. 432. 
lihopalodina lageniformis, incl. R. heurteli ; Perrier (254) p. 523 
and fig. 
Rhopalodinidae n. fam. = Tesselatae E. Perr., comprises Echinocucumis, 
lpsilothuria , and Rhopalodina ; Perrier (254) pp. 297, 515. 
Scotoplanes , revised diagnosis, comprises S. globosa , murrayi , delagei , 
mollis, papillosa (p. 417), S. insignis and S. robusta refd. to Periamma 
(p. 418) ; Perrier (254). 
Stereoderma murrayi , v. Thyone sacellus. 
Stichopus diagnosis ; Perrier (254) p. 482. S. chloronotus ; Gardiner 
( 99) : and n. var. fuscus, Pearl Banks, G. of Manaar, 9-26 fm. ; 
Pearson (250) p. 204. S. japonicus ; Mitsukuri (224). S. moseleyi 
Theel, which is refd. to Bathyplotes by Ostergren, is Synallactes ; 
Perrier (254) p. 349. S. natans ; Nichols (236) p. 246. S. regalis ; 
HenrI (130-133) : osmosis ; Henri & Lalou (140, 141) p. 721 : descr. ; 
PerrieR (254) p. 482. S. richardi , vide S. tremulus. S. tremulus ; 
Norman (239) p. 411 : incl. S. richardi , descr., sclerites figd. ; Perrier 
( 254) p. 484, pi. xvi : incl. S. richardi, Holotliuria ecalcarea and perh. 
H. calcarea ; Ostergren (244) p. 5. S. variegatus ; Pearson (250) 
p. 205. 
t Stueria elegans Schlumb., probably syn. of Myriotroclius rinlci ; Norman 
( 239) p. 416. 
Synallactes, revised diagnosis, and list of spp. (p. 338), S. crucifera 
R. Perr. 1898, off Morocco, 2212 m., redescr. and first figd. (p. 339, 
pis. xii, xvii) ; Perrier (254). S. moseleyi, v. sub Stichopus. 
Synallactidae n. fam. — Synallactinae Ludw., comprises Pelopatides , 
Psc'udostichop'us, Mesothuria , Mcseres, Synallactes, Bathyplotes, Zygo- 
thuria, Benthothuria, Bathyherpystikes ; Perrier (254) p. 299. 
Synapta sp. ; Petersen (259) : spicules, two spp. apparently nondescr. ; 
Pearson (250) p. 187. S. beselii; l.c. S. buski; Norman (239) 
p. 414. S. digitata , incl. S. thomso)ii Herapath ; Nichols (236) 
p. 241. S. inhaerens ; Davenport (44) p. 162: Nichols (236) p. 240: 
Polara (260): most records from northern regions due to confusion 
with Labidoplax buski ; Ostergren (244) p. 12. S. striata, habitat, 
colour, spicules, movement; Pearson (250) p. 186, pi. i. S. tenera, 
vide Labidoplax buski. 
