VI CONTENTS. 



CONTENTS OF No. LXXII, N.S., OCTOBEE, 1878. 

 MEMOIRS : 



PAGE 



On the Oral and Apical Systems of the Echinoderms. By 

 P. Hekbekt Carpenter, M.A., Assistant Master at Eton 

 College. (Parti) .351 



. On the Structure and Development of the Vertebrate Ovary. 

 By F. M. Balfour, M.A., Fellow of Trinity College, Cam- 

 bridge. (With Plates XVII, XVIII, XIX) . . .383 



The Reproduction of Lichens and the Sexuality of the Asco- 

 mycetes. By Sidney H. Vines. (With Plate XX) . 438 



NOTES AND MEMORANDA : 



Recent Observations on Botrydium granuJatum . . . 446 



Motility of the Spermatozooids of Limulus . . . 453 



■ The Early Developmental Changes in the Reptilian Ovum . 454 



Recent Researches on Bacteria ..... 455 



The Development of Calcareous Sponges . . 457 



