BIOLOGY. 
tick 33 
(5) Dorsal organ or ovoid gland of Sphcer echinus granularia and Doro- 
cidari8 papillataj its morphology and histology described, and function 
discussed; Leitoldt (148). — Cell structure ; Schneider (237). 
(6) Stewart’s organs ; Perrier (213) p. 826. 
(7) External branchiae ; Perrier (213) p.826 ; Kent (135) p. 43. 
(8) Eyes ; Agassiz (2) p. 88. 
(d) ASTEROIDEA : — (1) Skeleton, a comparative study ; Perrier 
( 211) and {213) p. 788.— Marginals of Aspidosoma ; Halfar (111a) p. 194. 
(2) Pedicellarise on terminals of Metopaster parhinsoni ; Sladen (248) 
p. 31. 
(3) Madreporite ; Chadwick (30). 
(4) Water- vascular system, tube-feet, histology ; Chadwick (30). 
(5) Respiratory papillae ; Perrier (213) p. 825. 
(6) Blood-vascular system ; Chadwick (30). — “Heart” derived from 
the tenth interradial gland ; Jourdain (129). 
(7) Eyes : Agassiz (2) p.88 ; Perrier (213) pp. 82 & 823: of Asterias 
vulgaris, A. forbesi , and Cribrella sanguinolenta ) histologically described ; 
Watase (269) p. 324. 
(e) OPHIUROIDEA : — (1) General description; Fjelstrup (84) 
pp. 4-17. 
(2) Skeleton ; Perrier (213) p. 791. — Skeletal formation in Ophiopus ; 
Mortensen (197) p. 524. — Ambulacral shields in Ophiurella griesbachi, 
and radial shields in Ophiura granulata and Ophiopege gregaria ; Boehm 
(22) : Ditto of Ophiopleura borealis ; Grieg (106) p. 3. — Dorsal arm- 
shields in Ophiopege gregaria ; Boehm (22). 
(3) Water- vascular system in Ophiopus , muscles of tube-feet ; Mor- 
tensen (197) p. 518. 
(4) Blood- vascular system in Ophiopus ; Mortensen (197) p. 518. — 
Aboral blood-sinus and its connection with the stomach in Ophiothrix ; 
Russo (231). — Ovoid gland, haemal system (?), axial and aboral sinuses in 
Amphiura ; Macbride (159) ; Cuenot (59). 
(5) Nervous system in Ophiopus ; Mortensen (197) p. 520. 
(6) Morphology of genital system in Amphiura squamata ; Russo (230) 
p. 16. — Genital organs and genital bursae in Ophiopus ; Mortensen (197) 
p. 511. — Genital bursa and ova of Ophiopus arcticus (p. 17), genital 
fissures in Asteronyx loveni (p. 29) ; Grieg (106). 
(f) CRINOIDEA : — (t) Skeleton; Perrier (213) p. 792. — Terminology 
and symbols ; Bather (11) pp. 17, 64, & 73. — Homologies of the 
calyx-plates in Antedon and other Crinoidea ; Seeliger (241) p. 389. — 
Dorsal cup,— of Bathycrinus carpenteri ; Danielssen (61) pp. 4 & 5 : of 
Saccocoma ; Jaekel (125) p. 662 : of Plicalocrinidce ; Jaekel (125) 
p. 621 : of Uintacrinus socialis , accurately described, basals and a plate 
[incorrectly] termed centrodorsal now first seen; Clark (36) p. 22 : of 
Pisocrinidce , fresh interpretation (p. 24), of Herpetocrinus , first described 
(p. 40), of Calceocrinulai, fresh interpretation (pp. 58, 63); Bather (11). — 
Infrabasnls,— discussion of Monocyclic and Dicyclic typos ; Agassiz (2) 
