CONTENTS OF No. 188.-New Series. 



MEMOIRS : 



L'AGK 



On tlie Dermal Fin-rays of Fishes — Living and Exiincl. By Edavin 

 S. Goodrich, M.A., Fellow of Meitou College, Oxford. (With 

 Plates 35— 41) 465 



The Structure and Classification of the Arthropoda. By E. Ray 

 Lankester, M.A., LL.D., F.R..S., Director of the Natural History 

 Departments of the British Museum. (With Plate 42) . . . 523 



Some Problems of lleproduction. — II. Hj Professor jMarcus Hartog, 

 Queen's College, Cork ......... 5S1 



