43 Verm. 
Subject Index. — Ohaetognatha, Etc. 
1019 
Echinorhynchus cenlropi from Cen- 
tropus senegalensis (Guinea) p. 699 fig. 1, 
rosai from Erinaceus enropaeus p. 700 
fig. 2, totani, from Tolanus canescens 
p. 701 fig. 3, spp. n. ; Porta T.c. 
OHAETOGNATHA, GASTRO- 
TRIO HA, ROTIFERA. 
SUBJECT INDEX. 
COMPREHENSIVE AND GENERAL^ 
1603 
Bibliography. 
Jahresberichte fiber Chaetognatlia 
ffir 1907 u. 1908 ; Ritter- Z&hony, 373. 
Jahresberichte fiber Rotifera u. Gas- 
trotricha ffir 1907 und 1908 ; Klausener, 
215. 
Addresses, Lectures. 
On Rotifers ; Wilkins, 467. 
STRUCTURE. 1607 
General. 
Gastrotrioha. 
Anatomy of the Gastrotrioha : 
general comparative account ; Grtin- 
span, 153. 
Excretory System. 
The nephridia of Rotifers ; Willem, 
468. 
Histology. 
Beitrage zur Histologie der Rader - 
tiere. ( Eosphora , Hydatina, Euchlanis, 
Nolommata) ; Hirschfelder, 180. 
Sexual Organs and Cells. 
Structure of the ovary and ovarial 
cells in Sagitta ; Buchner, 50. 
Bau der Genitalorgane von Sagitta ; 
Elpatievsky, 101. 
PHYSIOLOGY. 1611 
Environmental Effects. 
Conditions regulating the production 
of the parthenogenetic and sexual 
phases of the life-cycle of Hydatina 
senta ; Shull, 404 & 405. 
The influence of external conditions 
upon the life-cycle of Hydatina senta ; 
Whitney, 461. 
DEVELOPMENT. 1015 
Reproduction. 
Studies in the life-cycle of Hydatina 
senta. Artificial control of the tran- 
sition from the parthogenetic to the 
sexual method of reproduction ; Shull, 
405. 
Spermatogenesis, Oogenesis. 
Die Schicksale des Keimplasmas der 
Sagitten in Reifung, Befruchtung, 
Keimbahn, Ovogenese und Spermato- 
genese ; Buchner, 50. 
Entwicklung der Eier bei Sagitta ; 
Elpatievsky, 101. 
Embryology. 
Vorgiingo boi der Thcilung der Eier 
von Rotatorien und Gastrotrichen 
(Russ.) ; Golubeff, 141. 
ETHOLOGY. 1619 
General Biology. 
Biology of the Gastrotrioha ; Grtin- 
span, 153. 
Biologie der moosbewohnenden Ro- 
tatorien ; Heinis, 173. 
Plankton. 
Notes regarding occurrence, perio- 
dicity, etc., of Sagitta in plankton, South 
end Isle of Man, 1909 ; Herdman, 
Scott & Dakin, 176. 
La Colme (Nord), Rotifera in plank- 
ton ; Schodduyn, 396. 
Prester See (Magdeburg), Rotifera ; 
Honigmann, 186. 
Rotifera and Gastrotricha in plank- 
ton, German East Africa ; Daday, 78. 
