Echin. 41 
BIOLOGY, (ii, B, i, d — h.) 
(6) Ambulacral system; Haeckel (116) p. 467. — Ambulacra; Wachs- 
muth & Springer (336) p. 99. 
(8) Gut; Haeckel (116) p. 467. — Mouth; Wachsmuth & Springer 
(336) p. 99. — Gut of Pclmatozoa, coil dextral (“solar”) in most Crinoidea , 
but believed to bo sinistral (“contrasolar”) in Cladoidea Jaekel ( = Camerata), 
Cystidea ;, and Blastoidea', Jaekel (142). — Anus, rectum, supposed respi- 
ration by pores (pp. 124-139); anus, value in classification (p. 155); con- 
voluted organ (p. 142); Wachsmuth & Springer (336). 
(9) Chambered organ and axial canals ; op. cit. p. 140. 
(10) Modes of union between plates; op. cit. pp. 81-84. — Articulation 
of brachials in Uintacrinus; Bather (24) p. 989. — ‘Syzygy’ defined and 
use of term ‘joint’ restricted; Bather (21). — Syzygy in palceozoic and 
later Grin. ; Wachsmuth & Springer (336) p. 81.— Irregular arrangement 
of syzygies in Actinometra pulchella ; Koehler (163) p. 477. 
(12) Genital system; Haeckel (116) p. 468. 
(g) CYSTIDEA. 
(1) General, — shortnote ; Bather (28) p. 102. — Morphology of Cystidea ; 
Jaekel (143): of Cystidea and A mphoridea ; Haeckel (117): of Am- 
phoridea; Haeckel* (116) p. 427. — General account; Zitticl (356) and 
Zittel-Eastman (357). — Ditto, with synopsis of chief genera; Koken 
(171) p. 288. 
(5) Skeleton, — of Amphoridca ; Haeckel (116) p. 425: of Cystidea , 
general discussion ; Haeckel (116) p. 445. — Theca of Amphoridea ; Haeckel 
(118) p. 13: of Cystidea ; Haeckel (118) p. 78. —Pores in plates of 
Amphoridea and Cystidea ; Haeckel (118) p. 19. — “Hydrophores palmees” 
referred to Glyptocystidce ; Haeckel (118) pp. 48, 51, 53, 92-94, 152. — 
Number of arms of Echinosphcera aurantium\ Jaekel (143) p. 389. — Stem, 
evolution of pelmatozoan stem; Bather (26) p. 296. — of Mitrocystis 
described ; Pompeckj (268) p. 504. 
(6) Ambulacral system of Amphoridea ; Haeckel (118) p. 28: of 
Cystidea ; Haeckel (116) p. 449, (118) p. 89. 
(7) Coelomic cavities (p. 26) and blood-system (p. 27) of Amphoridea ; 
ditto of Cyst. (p. 88); Haeckel (118). 
(8) Gut-system (p. 26) and subvective system (p. 24) of Amphoridea ; 
Haeckel (118). — Ditto of Cystidea ; Haeckel (116) pp. 448 & 449, and (118) 
pp. 85, 87. 
(9) Nerve-system and sense organs of Amphoridea (p. 25) ; of Cystidea 
(pp. 86 & 87) ; Haeckel (118). 
(10) Muscles and Tegument of Amphoridea (p. 24); of Cystidea (pp. 
85 & 86) ; Haeckel (118). 
(12) Genital system of Amphoridea (p. 27); of Cystidea (p. 88); 
Haeckel (118). — Gonopore of Cystidea ; Haeckel (116) p. 448. 
(h) BLASTOIDEA. 
(1) General accounts; Zittel (356), Zittel-Eastman (357), Koken 
(171) p. 286.— Short noto ; Bather (28) p. 102. 
(5) Skeleton of Blastoidea , general aiscussion; Haeckel (116) p. 453. — 
Restored diagram and account of structure in Pentremitidea ; Oehlert 
(250) p. 834. 
(6) Ambulacral system of Blastoidea ; Haeckel (116) p. 457. 
(8) Gut of Blastoidea , and subvective system ; Haeckel (116) p. 456. 
(12) Genital system of Blastoidea , and hypothetical structure of genital 
organs; Haeckel (116) p. 458. 
