62 Echin . 
XIV. ECHINODEltMA. 
Scotoplana , restricted; Perrier (265) p. 901. . 
S. delagei , 1165-1385 metres, near Azores, spicules figured; HIsrouard 
( 126) pp. 164, 167, n. sp. 
Sigmodota , n. g. for spp. of Chiridota with sigmoid spicules ; Ostergren 
( 255), Bergens Mus. Aarbog, 1896, No. 12, p. 154, footnote. 
Sphazrothuria bitentaculata, found off Japan ; Mitsukuri (240). 
Stick opus ecalcareus (olim Holothuria ) Sars., perhaps = S. tremulus\ 
Ostergren (254) p. 9. — S. japonicus, change in spicules with advanc- 
ing age, includes Holothuria armata as var., also var. nov. austra- 
lis) Mitsukuri (238). — S. mollis Hutton sp., redescr. and figd, 
with internal anatomy and spicules, includes S. sordidus, Theel; 
Dendy (63) : first recorded from N. S. Wales, colour, external 
anatomy; Whitelegge (347). — S. regalis ; Iwanzoff (138) ; Koehler 
( 163) p. 488, & (164) p. 113. — S. tizardi , redescr. with figures, from 
B. of Biscay; Koehler (163) p. 484, & (164) p. 108, figg. 33-35. — 
S. torvus Theel, probably a Heseres ; Ostergren (253) p. 357. — S. 
tremulus (olim Holothuria) Gunn., redescr., internal anatomy causes 
change of genus, figures of spicules; Ostergren (254) p. 7. — S. 
variegatus ; Lampert (181) p. 59. 
S. griegi, 80-100 fms., W. of Utvaer in S.W. Norway, with anatomical 
notes and figures of spicules ; Ostergren (254), Bergens Mus. Aarbog, 
1896, No. 12, p. 4. — S. pollens, 1300 m., 5° 22' W., 44° 2' N., B. of 
Biscay, has no spicules; Koehler (164), Ann. Univ. Lyon, xxvi, 
p. Ill, figg. 1 & 45; & (163), Rev. biol. Nord France, vii, p. 486: 
probably a Meseres ; Ostergren (253) p. 357. — S. richardi, 351 m., 
B. of Biscay, spicules figd; HIsrouard (126) pp. 164 & 165 : n. spp. 
Synallactes , discussed; Ostergren (253) p. 356. — S. lactea ; H^rouard 
( 126) p. 164. 
S. theeli, based on specimens not named by Theel, “Challenger Rep. 
Holothurioidea, ,, ii, p. 242; Ostergren (253), Festskrift for Lillje- 
borg, p. 356, n. sp. 
Synallactinaz, removed from Holothuriidce to Elpidiidce ; Ostergren (253) 
p. 357. 
Synapta beselii ; Lampert (181) p. 64. — S. digitata ; H^rouard (126) 
p. 165; Koehler (163) p. 494, & (164) p. 121. — S. girardi, structure 
of genital tubules; Gerould (100) p. 172. — S. incequalis , holotype 
destroyed ; Dendy (63) p. 26. — S. lappa, anchors ana anchor-plates ; 
Ostergren (255) p. 150, fig. — S. oomax, spicules described, anatomi- 
cal notes; Lampert (181) p. 66. — S. picta, Thdel, probably syn. of S. 
vivipara ; Clark (53) p. 282. — S. serpentina, colour, anatomical notes, 
number of tentacles; Lampert (181) p. 64. — S. uncinata, holotype 
redescr. with internal anatomy; Dendy (63) p. 25. — S. vivipara, 
general description, spicules figd, development, habitat, food ; Clark 
(53). 
Synaptidce, distinctive characters; Gerould (100) p. 181. 
Synaptonia, order defined; Haeckel (116) p. 439. 
Synaptula, syn. of Synapta\ Clark (53) p. 282. 
Thy one brevidentis Hutton, referred to Colochirus ; Dendy (63) p. 40. — 
T. briareus, structure of genital tubules; Gerould (100) pp. 171 & 
172. — T. inermis ; H^rouard (126) p. 165. 
Thyonidium longidentis Hutton sp., redescr. and figd, includes T. cauda- 
tum Hutton, and T. rugosum. Th<5el; Dendy (63). 
Trochostoma, anchors and anchor-plates; Ostergren (255) p. 158, fig. — 
T. antarcticum , no muscular tubules in integument; Gerould (100) 
p. 133. — T. ( Molpadia ) oolitica ; Honeyman (131) p. 258. 
Tutela, n. g. with genotype T. echinata, N. Atlantic, precise locality and 
depth not given, and no fig.; Perrier (265), C.H. Ac. Paris, cxxiii, 
p. 901, n. sp. 
