iv CONTENTS. 



XII. Notes on the Fins of Elasmohranchs,iuith Considerations on the Nature and Homo- 

 logues of Vertebrate Limbs. By St. George Mivart, V.P.Z.8. . . page 439 



XIIT. On the Mechanism of the Odontophore in Certain MoUusca. By Patrick 

 Geddes 485 



XIV. On the Hearts of Ceratodus, Protopterus, and Chimsera, with an Account of 



undescribed Pocket Valves in the Conus arteriosus of Ceratodus and of Protopterus. 

 By E. Eat Lankestee, M.A., F.R.S., Professor of Zoology and Comparative 

 Anatomy in University College, London 493 



XV. Observations on the Uraniidm, a Family of Lepidopterous Insects, with a Synopsis 



of the Family and a Monograph q/" Coronidia, one of the Genera of which it is 

 composed. By J. O. Westwood, M.A., F.L.S., &c 507 



XVI. Supplementary Notes on the Curassows now or lately living in the Society's Oar- 



dens. By P. L. Sclater, M.A., Ph.D., F.R.S., Secretary to the Society . . 543 



List of the Papers contained in Vol. X 547 



Index of Species &c 549 



