74 Echin. 
XIV. ECHINODERMA. 
[1904] 
■\Thylechinus ; Delage (54) p. 238. 
j-Tiarechinus ; Delage (54) p. 219. 
f Tiarec/iinusinae defined, incl. Li/sechinus ; Delage (54) p. 219. 
fTiarinae ; Delage (54) p. 234. ' 
iTipocidaris : — T. clavigera (p. 76), T. hirudo (pp. 70, 77) ; Collet (44). 
Toreumatica rejected (p. 61) but might be used for Temnopleurus reevesi 
(p. 76) ; Mortensen (195). 
iToxaster : — T. complanatus ; Strangways (266) p. 73. T. texanus ; 
Udden (273) p. 35, 37. 
Toxohrissus distinguished from Brissopsis (p. 193), T. padficus descr. 
(p. 192, pis. ciii, cv); Agassiz (3). 
Toxocidaris ; Delage (54) p. 246 : diagnosis ; Meissner in Hamann 
(112) p. 1376. 
Toxopyieustes descr. ; Delage (54) p. 244, fig. : diagnosis ; Meissner in 
Hamann (112) p. 1372. ■\T. delaunayi; Couffon (46) p. 41. T. 
lividus^ vide sub Paracentrotus. T. pileolus ; Herdman (120) p. 140 : 
radioles, spicules, pedicellariae ; de Meijere (57) p. 92, pi. xvii : 
distinguished from Echinus trizonalis & Boletia hizonata ; MortenseN 
(195) p. 120. T. variegatus^ vide sub Psammechimis. 
Toxopneustesinae defined with list of genera ; Delage (54) p. 243. 
■\Trachyaster (v. etiam sub Hemiaster) : — T. gourdoni, T. trutati ; Gourdon 
(102) p. 220. 
^Trachypatagus meneghinii ; Dainelli (50), & descr. (49) p. 197, pi. xv. 
Tretocidaris ; Delage (54) p. 228. 
Trigonocidarinae ; Delage (54) p. 240. 
Trigonocidaris descr. ; Delage (54) p. 240, fig. : diagnosis ; Meissner in 
Hamann (112) p. 1367. T. albida, Sulu Is., var. (p. 73, 202), T. 
monolini referred to Genocidaris (q. v.) (p. 74) ; de Meijere (57). 
Tripneustes descr. ; Delage (54) p. 244 : diagnosis ; Meissner in 
Hamann (112) p. 1372. T. gratilla ; Martens (185) p. 131 : 
(= variegatus & angidosus Leske), colour, spicules ; de Meijere (57) 
p. 95. 
Tripylus ; Delage (54) p. 271, fig. 
Tromikosoma ; Delage (54) p. 223, fig. T. mordens n. sp., S. of Timor, 
2050m. ; de Meijere (57) p. 39, pi. xiii. 
Urechinidae, n. fam. for Urechinus, Cystechinus^ Calymne, Phrissocystis ; 
Meissner in Hamann (112) p. 1402 : as sub-fam. [of Spatangidae ?], 
incl. Urechinus, Cystechinus^ Pilematecliinus n. g., & Calymne (p. 131), as 
fam. of " Ananchytid Spatangoids" (p. 150), as sub-fam. of Anan- 
chytidae (p. 152) ; Agassiz (3). 
Urechinus diagnosis ; Meissner in Hamann (112) p. 1402. U. giganteus 
descr. ; Agassiz (3) p. 152, pis. Ixxii-lxxiv, also p. 130. U. naresianus ; 
Bell (22a): actinal area (p. 122, 130, 154 & figg.) apical system 
(p. 156 & fig., pi. Ixxiv) ; Agassiz (3). 
i Xenocidaris, X. clavigera^ X. conifera^ X. cylindrica ; Klem (142) 
pp. 75-76. 
iZeuqiopletirus ; Mortensen (195) p. 112. Z. roicei, in Marsupites zone ; 
kowE (235) p. 255, 256, 293. 
(D.)-ASTEROIDEA. 
Asteridia divided into Subclass 1, Palasteridiae, 2, Euasteridiae, the latter 
alone into Orders 1, Plianerozonida^ 2, Cryptozonida, each with its 
Families ; Delage (54) p. 82 sqq. 
Acantharchaster ; Delage (54) p. 86. 
Acanthaster ; op. cit. p. 102. A. Solaris; Martens (185). 
Acanthasterinae ; Delage (54) p. 102. 
