BIONOMICS. 
Ech. 89 
Structure of Saccocoma correlated with pelagic life ; Jaekel (125) 
p. 687. 
(vii) Autotomy and Regeneration In Linckia ; Field (82) 
p. 84. — Autotomy, A sterias fragilis ; Studer (256) p. 269. — Sponta- 
neous division of an arm which regenerated a disc, in Asterias muelleri ; 
Danielssen (61) p. 12. — Autotomy of Asterias richardi , from a young 
with 6 arms to adults with 5 arms ; Marenzeller (166) p. 66. — Sponta- 
neous division of one individual to form two, in Asteroidea and Ophiu- 
roidea ; 'Perrier (213) p. 845. 
Autotomy of Holothurians in connection with Entoconcha mirabilis ; 
Marshall (170) p. 87. — Cuvierian organs, extrusion in Ilolothuria argus ; 
Studer (256) p. 234. 
Apparent spontaneous division of Bathycrinus carpenteri ; crown above 
basals being thrown off, perhaps after reproductive period, and regene- 
rated on the stem left behind; Danielssen (61) pp. 1 1-14. — Regeneration 
of arms in Dendrocrinus ; Foerste (85). — Incomplete evisceration in 
Antedon ; Ciiadwick (31). 
(viii) Parasites and Commensals Gregarines in Holothurians, 
relation to Cuvierian organs (p. 300) and to descent of species (p. 304) ; 
Minciiin (189). 
Gregarines in Synapta inhaerens , S. digitata , Echinocardium cordatum ; 
Cyclochaeta , a ciliate infusorian, symbotic in Synapta inhaerens , com- 
mensal with Asterina gibbosa and Ophiolhrix fragilis ; Trematode cer- 
cariro on tentacles of Synapta inhaerens , and in Ophiolhrix fragilis and 
Ophioglypha albida ; a Turbellarian, Syndcsmis , in Echinus sphaera , E. 
acutus, and Strongylocentrotus lividus ; a Rotifer, Discojms, on Synapta 
inhaerens ; a Polychaet, Hermadion , on Ophiothrix fragilis ; a Tardigrade, 
Tetra7ce?itron, on Synapta inhaerens ; a Copepod, Synaptiphilus luteus , on 
Synapta inhaerens and S. digitata : Cuenot (60). — Nematode in Synapta ; 
Ctenodrilusin Synapta and Ilolothuria ; Anoplodium in Ilolothuria ; Ophry - 
otroclm in Cucumaria : Monticelli (193).— Copepod in Synapta kefer- 
steini ; Voigt (267). 
Species of Myxostoma parasitic on Antedon phalangium } M. pulvinar 
lives in oesophagus; Prouho (220). — Parasites in stem of Botryocrinus ; 
Bather (11) p. 120. 
Linckia multiforis , with “ eine symbiotische Schnecke, Thyca crystal - 
lina"; Martens (171) p. 183. — Association of Crinoids and Gasteropods; 
Keyes (136, 138). 
Complete account of Fierasfer and Encheliophis in Holothurians and 
Asteroids ; Cuijinot (56). See also Kent (135) p. 240 . — Entoconcha in 
Ilolothurian ; Marshall (170). 
(ix) Echinoderms as food for Pish : — Amphiura in Pleuronectes 
platessa , P. limanda , P. cynoglossus, Ilippoglossoides limandoides , Gadus 
(eglefinuSy G. merlangus , Trigla gurnardus; Ophioglypha in Pleuronectes 
platessa , P. limanda , Ilippoglossoides limandoides , Gadus ccglefinus , Raia 
clavata , G • morrhua ; Amphulotus in Pleuronectes platessa , P. micro - 
cephalus , P. limanday Ilippoglossoides limandoides , Gadus ccglefinus ; 
