24 Echin. 
V. E chino derma. 
[1910] 
Changes during Life. 
Adaptation for free swimming habit 
in Pentacrinus ; Oswald, 251 . 
Difference of young forms of Aster- 
oidea from adults ; Simpson & Brown, 
313. 
Regeneration. 
Organogenese bei der Regeneration 
won Line kia; Richters, 281. 
Experimental Embryology. 
Effect of centrifugal force on 
development of Arbacia ; McClendon, 
231. 
Development of separated Blas- 
tomeres of centrifuged eggs in Arbacia ; 
Payne, 262. 
Artificial culture of plankton 
organisms ; Allen & Nelson, 3. 
Echinoderm hybridization ; Tennent, 
332. 
Oxydationen in lebenden Zellen 
nach Versuchen am Seeigel.'i; War- 
burg, 361. 
Cytologische Experimente am 
.Seeigelei; Garbowski, 120. 
Die Sensitivierung der Seeigeleier 
mittels Strontiumehlorid ; Loeb, 208; 
Influence of amino-acids on develop- 
ment of echinoderms ; Mathews, 230; 
Notwendigkeit von freien Sauerstoff 
-fur die entwickelungserreugende Wir- 
kung; Loeb, 207. 
Artificial parthenogenesis in Stron- 
; gylocentrotus ; Hindle, 142; Artificial 
Parthenogenesis of Arbacia Egg; 
McClendon, 232, 233. 
Ophiothrix fragilis, effect of artificial 
fertilisation; MacBride, 216. 
ETHOLOGY. 1019 
General. 
Tierkolonien (fossile) ; Leuthardt, 
202 . 
Righting tendency in Asterias forreri ; 
Jennings, 155. 
Sexual dimorphism for brood-pro- 
tection among Ech. ; Clark, 59. 
Psychology. 
Formation of habits in Asterias 
forreri ; Jennings, 155. 
Symbiosis, etc. 
Eulima capillastericola found on 
Capillasler multiradiata at Singapore ; 
Bartsch, 12. 
Commensalism between Pentaceros 
lincki and a species of Fierasfer ; 
Simpson, & Brown, 313. 
Feeding Habits. 
Nahrung von Strongylocentrotus 
droebachiensis ; Averincev, 9 ; Nahrung 
von Echinodermen ; Eichelbaum, 99. 
Seestern und Muschel ; Merkel, 
234. 
Die Ernahrung der Wassertiere; 
Putter, 267. 
Ueber Hunger bei Asterias rubens 
nach der Metamorphose; Schultze, 
305. 
Parasitism. 
L’.infection d’une Ophiure {Am- 
phiura squamata) par un Orthonectid 
(Bhopalura ophiocomae); Caullery & 
Lavallde, 43 ; Nemertine in Echinus 
sphaera ; Irving, 148; Plantes para- 
sites dans les Echinoderm es ; Morten- 
sen & Rosenvinge, 243. 
Defensive Processes. 
Venoms and venomous animals ; 
Calmette & Austen, 40. 
Utility. 
Diadema used as bait ; Andrews, 
4; Ech. food of fishes; Lebour, 191. 
Strongylocentrotus used as food by 
N. Amer. Indians; Reagan, 270. 
VARIATION AND /ETIOLOGY. 
1023 
Substantive Variation. 
Variieren der'Farbung bei Strongylo- 
centrotus ; Averincev, 9. 
