J 



iv CONTENTS. 



CONTENTS OF No. 219, N.S., SEPTEMl^/ER, 1910. 



MEMOIRS : PA«E 



Notes on the Free-living Nematodes. I. The Hermaphrodite 

 Species. By F. A. Potts, M.A., Fellow of Trinity Hall, Cam- 

 bridge, and Demonstrator of Comparative Anatomy in the 

 University. (With 11 Text-figures) . . . 4:i;i 



Observations on Trypanoplasma Congeri. Part I. The Division 

 of the Active Form. By C. H. Martin, B.A., Demonstrator of 

 Zoology, University of Glasgow. (With Plate 21, and 1 Text- 

 figure) ....-■■ ^^^> 



The Development of Aplysia punctata. By A. M. Cakk 

 Saunders and Margaret Poole. (With Plate 22. and 20 Text- 

 figures) ...... 497 



j^The Relation between Light and Pigment-formation in Creni- 

 labrus and Hippolyte. By F. W. Gamble, F.R.S., Mason 

 Professor of Zoology, University of Birmingham. (With Plate 23) 041 



Is the Trophoblast of Hypoblastic Origin as Assheton will have 

 it? By A. A. W. HoBRECHT. (With 7 Text-figures) . . .58.5 



The Origin and Formation of Fibrous Tissue produced as a 

 Reaction to Injury in Pec ten Maxim ixs, as a Type of the 

 Lamellibranchiata. By G. H. Drew, B.A., Beit Memorial 

 Research Fellow, and W. De Morgan, F.Z.S. (With Plate 24) 595 



CONTENTS OF No. 220, N.S., NOA^EMBEH, 1910. 



MEMOIRS : 



The Division of the Collar-Cells of Clathrina coriacea 

 (Montagu) ; a Contribution to the Theory of the Centrosome 

 and Blepharoplast. By Muriel Robertson, M.A., and E. A. 

 MiNCHiN, M.A. (With Plates 25 and 26) . . .611 



Studies on Avian Ha^moprotozoa. I. — On Certain Parasites of 

 the Chaffinch (Fringilla coelebs) and the Redpoll (Linota 

 rufescens). By H. M. Woodcock, D.Sc.(Lond.), Assistant to 

 the University Professor of Protozoology. (With Plates 27-31) 641 



Studies on Ceylon Htematozoa. No. II. — Notes on the Life-Cycle 

 of HEemogregarina nicorise. Cast, and Willej'. By Muriel 

 Robertson, M.A. (With Plates 32-41 and 1 Text-figvire) 741 



On the Origin and Migration of the Stinging-Cells inCraspedote 

 medusae. By Charles L. Boulenger, M.A.Camb., Lecturer 

 on Zoology in the University of Birmingham. (With Plates 42 

 and 43 and 5 Text-figures) .... 763 



The Researches of Bouvier and Bordage on Mutations in Crustacea 

 of the Family AtyidaB. By W. T. Calman, D.Sc. (With 4 

 Text-figures) ...... 785 



Title, Index, and Contents. 



