CONTENTS. 



PAGE 



*Me. Sydney J. Hickson. — The Eye of Pecten. Plates 



I and II .1 



*Me. Adam Sedgwick. — On the Early Development of. 

 the Anterior Part of the Wolffian Duct and Body 

 in the Chick, together with some Remarks on the 

 Excretory System of the Vertebrata. Plate III 13 



***Mb. P. M. Balfotje. — On the DeYelopment of the 

 Skeleton of the Paired Fins of Elasmobranchii, 

 considered in relation to its bearings on the 

 Nature of the Limbs of the Vertebrata. Plates 

 lYandV . . . .51 



*Me. p. M. BALForE. — On the Nature of the Organ in 

 Adult Teleosteans and G-anoids, which is usually 

 regarded as the Head Kidney or Pronephros . 69 



*Me. K. Mitsukuei. — On the Development of the 



Suprarenal Bodies in Mammalia. Plate YI . 75 



**Me. p. M. BALrouE and ^V. IN. Paekee.— On the 



Structure and Development of Lepidosteus . 89 



**Me. Adam Sedgwick. — On Certain Points in the 



Anatomy of Chiton . . . .99 



**Me. "Waltee Heape. — On the Germinal Layers and 



Early Development of the Mole . . . 107 



*Me. p. M. Balfoue and Mr. P. Deighton. — A 

 Renewed Studv of the Germinal Layers of the 

 Chick. Plates' YII, YIII, and IX . . 117 



N.B. — The papers marked with one asterisk are reprinted from 

 the ' Quarterly Journal of Microscopical Science,' the papers 

 with two asterisks are reprinted from the ' Proceedings of the 

 Eoyal Society,' and the paper with three asterisks from the 

 • Proceedings of the Zoological Society.' 



