14 ECHINODERMA, 
Stage 8. ACTINOGONIDIATA. 
Ist Subbranch. STATOZOA. 
Substage i. Apelmatozore. 
Class 3. PSome CysTipra. 
Class 4. PSome BLAsToIpEa. 
Class 5. ? Some CRINOIDEA. 
Substage ii. Pelmatozore. 
Class 6. Some CystTIDEA. 
Class 7. BLASTOIDEA (s. 8.). 
Class 8. CRINOIDEA (S. §.). 
2nd Subbranch. ELEUTHEROZOA. 
Division i. Azygopod (Lissactinic).. 
a. With open ambulacra. 
Class 9. ASTEROIDEA. 
8. With (in most) a ventral arm-ossicle 
Class 10. OPHIUROIDEA. 
Division ii. Zygopod (Desmactinic). / ” 
Class 11. EcHINOIDEA. 
Brancp A. INCALICULATA. 
Incaliculata, Beli, Ann. § Mag. viii. (1891) p. 212. 
Kchinoderma in which no system of plates set alternately along 
and between the rays is developed in the aboral region. 
Stage a. Anactinogonidiata. 
Anactinogonidiata, Bell, Ann. § Mag. viii. (1891) p. 212. 
Echinoderma in which the vascular and nervous, but not the 
digestive or reproductive, systems exhibit quinqueradiate symmetry. 
Class 1. HOLOTHURIOIDEA. 
Holothuria, Linn. Syst. Nat. xii. (1767) p. 1089 (pars); de Bl. Dict. 
Sci. Nat. xxi. (1821) p. 310, 
Les Fistulides, Lamk. Syst. An. s. Vert. (1801) p. 351 (pars). 
Les Holothuries, Cuv. Regne An. iv. (1817) p. 20. 
Fistulida, Macleay, Hor. Entom. (1819) p. 316; Gray, Ann. Phil. x. 
(1825) p. 423. 
Fistulata, Priichwald, Zool. Spec. i. (1829) p. 232. 
Holothurides, de Bl. Actin. (1854) p. 188) Duj. § Hup. Echin. (1862) 
p. 609. 
Holothurina, Brandt, Prod. deser. (1835) p. 
Fistulides ou Holothuries, Ag. Mém. Soc. PNough i. (1836) p. 180. 
