560 



INDEX 



Yellow-cells, in Leptoplana, 13 



Yolk-gland, in Planaria, 38, 39 ; in Rhab- 

 docoelida, 47 ; in Temnocephala, 54 ; 

 in Polystomatidae, 57 ; in Callioboth- 

 rium, 75 ; in Schistocephalus, 86 ; in 

 Rotifers, 199, 216 



Yoruba Worm, 368, 387 



Youatt, on Coenurns, 82 



Yungia, 19, 25 



Zebra, parasites of, 140 



Zelinka, on JRotifers, 198, 215 n., 218, 219, 



227, 229 ; on Gastrotricha, 232 

 Zooapinm, 466, 469, 474, 488, 523 ; of 



Phylactolaemata, 495 ; loss of zooecia, 



481, ( = calyces), 488; primary, 506; 



alterations with age, 522 

 Zone of budding, 279, 283 

 Zooid, sexual and asexual, 278 f. 

 Zoophytes, 465, 474 



END OF VOL. II 



Printed by R. & R. Clark, Limited, Edinburgh. 



