17 Echin. 
Ethology, Variation, Distribution. 
1019, 1023, 1027 
Myzostomaspp.n] McClendon, 158. 
Ascothoracida ( Deiidrogaater ), in 
Asteroidea ; Le Roi, 139. 
Infusorian ( Orchidophya stellarum gen. 
et sp. n.) on Asterias rubens] C4p&de, 
36. 
Unicellular algae symbiotic with 
Synaptula ; Clark, 52, p. 43. 
“Ciliated funnels ” of Holotliuroidea 
possibly parasitic; Dendy & Hindle, 68, 
p. 121. 
Enemies, etc. 
Echinoderma used as food by fishes ; 
Johnstone, 118. 
Destruction of Echinoida by materials 
erupted from Vesuvius ; Poso, 187. 
Defence and Protection. 
Diadema] Verrill, 219, p. 323. 
Mimicry, Astroporpa affinia resembles 
gorgonian (V errueclla) on which it lives ; 
Verrill, 219, p. 329. 
Autotomy of corona, Bathycrinus ; 
DSderlein, 74, p. 6. 
Ornament and Colour. 
Coloration, Synaptidae ; Clark, 52, p. 
42. 
Coloration, Molpadiidae ; Clark, 52, 
p. 136. 
Economics. 
Use as food, Hippono'e ; Verrill, 219, 
p. 324. 
Aateriaa rubcna , injury to Oatrca 
fisheries ; Joubin, 121. 
VARIATION AND AETIOLOGY. 
1023 
Variation and Teratology. 
Meristic variation, Solaater papposua 
M’lntosh, 160. 
Local variation, Asteroidea ; Grieg, 
103. 
Sexual dimorphism, Ophiacantha 
vivipara ; Koehler, 132. 
Teratology, Ophiothrix larvae; Mac- 
Bride, 156, 154. 
(n- 10189 m) 
Teratology, hermaphroditism, esp. 
Strongyloce'ntrotua ; Gadd, 92. 
Phylogeny. 
General; Hamann, 105. 
Holotliuroidea ; Becher, 19 ; Oster- 
gren, 178. 
Synaptidae ; Clark, 52, p. 130. 
Molpadiidae; Clark, 52, p. 186. 
Ancestral form ; MacBride, 156. 
Ancestral form, Holotliuroidea ; 
Becher, 19. 
Hybridism. 
Hybridism, Aateriaa (?) groenlandica 
x hyperborea ; Kalischewskij. 123 p. 41. 
DISTRIBUTION.* 1027 
* An asterisk after the title No. indi- 
cates that the work in question has not 
(except as regards spp. n.) been analysed 
in detail in section III. 
(a) Recent. 
General. 
“ Bipolarity ” disc, and denied ; 
Vaney, 217. 
Rev. apodous Holothurioidea, spp. n. ; 
Clark, 52. 
Synaptidae ; Clark, 52, p. 131. 
Molpadiidae ; Clark, 52, p. 187. 
Arctic. 
Arctic Ocean, Hymenci8ber var« n. ; 
Kalischewskij, 123. 
Greenland Sea, Asteroidea etc. ; 
Grieg, 103. 
Barents Sea, Asteroidea ; Grieg, 103. 
Murman Sea ; Kalischewskij, 123. 
Nordenskiold Sea; Aateriaa var. n.; 
Kalischewskij, 123. 
Kara Sea ; Aateriaa varr. n. ; Kali- 
schewskij, 123. 
New Siberian Is. (and sea to north), 
Aateriaa var. n. ; Kalischewskij, 123. 
Alaska ; sp. n. Antedon ; Clark, 50. 
North Atlantic. 
N. North Atlantic, “Belgica” collns. 
descr. ; Grieg, 104. 
b 12 
