PROCEEDINGS 



GENERAL MEETINGS FOR SCIENTIFIC BUSINESS 



ZOOLOGICAL SOCIETY OF LONDON 



PAPERS. 



1. On the Ciliation of Asterids, and on the Question of 

 Ciliary Nutrition in Certain Species. By James F. 

 Gemmill, M.A., M.D., D.Sc, F.Z.S. 



[Received October 30, 1914 : Read February 23, 1915.] 

 (Plates I.-III.* and Text-figures 1 & 2.) 



Index. Page 



I. Ciliary Currents. 



1. Methods and Orientation 2 



2. Ciliation of External Surface 3 



3. Ciliation of Perivisceral Cavity: («) Somatopleure (p. 5) ; 



(b) Splanchnopleure (p. 6) 5 



4. Ciliation of Endoderm ti 



5. Ciliation of Minor Cavities 8 



6. Relation of Larval to Adult Ciliation 9 



II. Ciliation and Feeding. 



Porania pulvillus (Adaptations in Structure, etc. ; Aquarium 



Experiments) ]0 



Astropec ten irregularis 14 



Solaster papposus, and other Starfishes 15 



Rearing on Phylogeny 15 



Summary 17 



In studying the development of the common Crossfish, Asterias 

 rubens L. (4), I was struck by the constancy and functional im- 

 portance of the ciliation on the various surfaces (epidermal, 

 endodermal, and enterocoelic) of the larva. The larval ciliation 

 being continued at metamorphosis into that of the starfish, it 



* For explanation of the Plates see pp. 18-19. 



Pitoo. Zool. Soc— 1915, No. I. 1 



) 



