544 



INDEX. 



PAGE 



SavUle-Kent, W. Contribu- 

 tions to a knowledge of 

 the Hydrachnidae . . 261 



Scepanotrocha corniculata sp. 



nov. . , . .79 



Scepanotrocha rubra sp. nov. . 78 



Scourfield, D. J. The use of 

 the centrifuge in pond- 

 life work . . .243 



Screens (illumination) . .295 



Secondary structure of N. 

 Smithii. A. A. C. Eliot 

 Merlin . . .443 



Seeds as microscopic objects. 



N. E. Brown . . 307 



Sex, the origin of . .178 



Sexual differentiation in Pro- 

 tista . . . .177 



Shoebotham, J. W. A 

 general account of the 

 Spring-tails (Collembola) 452 



Sidebottom, H. Two new 



species of Cassidulina . 105 



Lagenae of the South-west 



Pacific Ocean . . 375 



Simpson, J. J. The relation- 

 ship between insects and 

 disease . . . 454 



Soar, Charles D. The work 

 of the late Saville-Kent 

 on British Hydrachnids. 251 



A contribution to the list 



of Hydrachnidae found 



in the East African Lakes 109 



Solpuga ferox. Note on R. T. 



Lewis .... 507 



Spermatozoa, dimorphism in 



T. A. O'Donohoe . .313 



Stevens, John. Note on Pro- 

 ales {Notommata) gigan- 

 tea . . . . 481 



Stokes, N. B. On resolu- 

 tions obtained with dark- 

 ground illumination and 



PAGE 



their relation to the spec- 

 trum theory . . . 497 

 Syngamy . . . .177 



Tardigrada. James Murray 181 

 Treasurer's Report for 1909 . 54 



1910 . . . .236 



1911 . . . .474 



Trochodota dunedinensis . 536 

 Trypanosoma hrucii . .14 



Trypanosoma lewisi . .14 



Tubercle bacillus, flagellum of 441 



U 



Unionicula Gunningtoni sp. 



nov. . . . .112 



V 



Volvox, African species 



G. S. West . 

 Volvox africanus sp. nov. 

 Volvox aureus 

 Volvox globator . 

 Volvox Rousseleti sp. nov. 



W 



of 



99 

 102 

 100 

 100 

 101 



Water-bears, vide Tardigrada 

 West, G. S. Some new 



African species of Volvox 99 



X 



Xenomorphidae (Tardigrada) 181 



Zootham,nium geniculatum . 35 



