41 Verm. 
Subject Index. — Chaetognatha, Etc. 
1627 
Jahresberichfc iiber Chaetognatha fur 
1909 ; Ritter Zdhony, 309. 
STRUCTURE. 1607 
General. 
Rotifera. 
Comparison of the dimorphic females 
of Asplanchna sieboldii ; Lange, 182. 
Account of a new Rotifer, Hyalo- 
cephalus trilobus n. g., n. sp. ; Lucks, 
220 . 
Males of Lacinularia reticulata and 
elliptica; Shephard, 345. 
Histology. 
Remarques sur l’histologie des Roti- 
feres (specialement d ' Eosphora) a pro- 
pos d’un travail recent (de Hirsch- 
felder); de Beauchamp, 16. 
PHYSIOLOGY. 1611 
Environmental Effects. 
The role of temperature, of the 
chemical composition of the medium, 
and of internal factors upon the ratio 
of parthenogenetic to sexual forms in 
Ilydatina senta; Shull, 347. 
REPRODUCTION. 1615 
Life-history. 
Postembryonic cycle of generations 
in Asplanchna sieboldii Leydig ; con- 
nection of dimorphic females ; Lange, 
182. 
Spermatogenesis, Oogenesis. 
Further studies on reproduction in 
Sagitta; Stevens, 366. 
ETHOLOGY. 1619 
Plankton. 
River Po, Rotifera in plankton ; 
Padovani, 285. 
Vcrteilung dor Riidertiere in der 
Oka (Russ.); Voronkoff, 386. 
Rotifera des Planktons der Halbinsol 
Jamal (Russ.) ; Voronkoff, 385. ’ 
Atlantic Ocean, die Chatognathen 
der Plankton-Expedition der Hum- 
boldt-Stiftung ; Ritter-Zdhony, 306. 
VARIATION, PHYLOGENY. 1623 
(Vacant.) 
DISTRIBUTION. 1627 
Europe. 
Clare Island (W. Coast Ireland) 
Survey, Rotifera; Rousselet, 317. 
Clare Island (W. Coast of Ireland), 
Rotifera Bdelloida ; Murray, 255. 
Coasts of Ireland, Chaetognatha ; 
Ritter-Zdhony, 305. 
Tromso, Rotifera ; Lie-Pettersen, 207. 
Bernese Oberland et Pays d’En- 
Haut vaudois, Rotifera; Delachaux, 
65. 
Lakes of Canton Neuchatel, Rotifera ; 
ThiSbaud, 378. 
Berent (West Prussia) in small peat 
bogs, associated with Sphagnum , a 
new Rotifer, Hyalocephalus trilobus ; 
Lucks, 220. 
Die Rotatorienfauna der flachen 
Tiimpel Galiziens ; Kozar, 181. 
Verbreitung der Rotifera in Russ- 
land ; Voronkoff, 386. 
Rotiferes de quelques lacs de l’Oural ; 
Fuhrmann et Thi6haud, 106. 
Africa. 
South Africa, Bdelloid Rotifera, with 
new species ; Murray, 256 & 262. 
Australia. 
Australia and New Zealand, collected 
by the Shackleton Antarctic Expedi- 
tion, Rotifera ; Murray, 257 & 261. 
Victorian Rotifers ; Shephard, 345. 
America. 
Canada (British Columbia and On- 
tario), Rotifera ; Murray, 258. 
Oaxaca and neighbourhood, Mexico, 
Rotifera (mostly Callidina spp.); 
Heinis, 154. 
Oceanic. 
North Atlantic, and North and 
Irish Seas, Chaetognatha ; Apstein, 3. 
Antarctic, National Expedition 
(“ Discovery ” ) Chaetognatha, and com- 
parison with distribution as found by 
“ Challenger ” ; Fowler, 87. 
