CONTENTS OF PART II. 



*Mr Sydney J. Hickson. — The Eye of Pecten. Plates I. 



and II. . . 1 



*Mr Adam Sedgwick. — On the Early Development of the An- 

 terior Part of the Wolffian Duct and Body in the Chick, 

 together with some Remarks on the Excretory System 

 of the Vertebrata. Plate III. . . . . .13 



***Mr F. M. Balfour. — On the Development of the Skeleton 

 of the Paired Fins of Elasmobranchii, considered in re- 

 lation to its bearings on the Nature of the Limbs of 

 the Vertebrata. Plates IV. and V. . . . .51 



*Mr F. M. Balfour. — On the nature of the Organ in Adult 

 Teleosteans and Ganoids, which is usually regarded as 

 the Head Kidney or Pronephros . . . .69 



*Mr K. MiTSUKURi. — On the Development of the Suprarenal 



Bodies in Mammalia. Plate VI. . . . .75 



**Mr F. M. Balfour and W. N. Parker. — On the Structure 



and Development of Lepidosteus .... 89 



**Mr Adam Sedgwick. — On Certain Points in the Anatomy 



of Chiton 99 



**Mr Walter Heape. — On the Germinal Layers and Early 



Development of the Mole . . . . . .107 



*Mr F. M. Balfour and Mr F. Deighton. — A Renewed 

 Study of the Germinal Layers of the Chick. Plates 

 VIL VIII. 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 Royal 

 Society,' and the paper with three asterisks from the ' Proceedings of 

 the Zoological Society.' 



