35 



On the Structure and Affinities of Mnestra parasites 



Krohn; with a revision of the Classification of the 



Cladonemidae* 



By 

 R. T. Günther, M. A, F. L. S. 



Fellow aiiJ Tutor of Magdalen College, Oxford. 



With plates 2 and 3. 



An account of the anatomy and affinities of Mnestra was the 

 piimary purpose of the present paper; hut, during the progress of 

 the work it gradually became apparent that the commonly accepted 

 classifications of the Cladonemidae would be subjected to an undue 

 strain by the forcible introduction of the genus, and that therefore 

 a modified scheme of Classification of this family was needed. 



It !Ìs to be hoped that a more searching investigatìon of the 

 other Cladoneniid genera and especially of the Haeckeliau genera 

 may soon be made. 



The present research would bave been impossible for me had 

 it not been for the facilities afiforded by the Naples Zoological Station. 

 Once more I gladly avail myself of au opportunity of thanking my 

 good friends, the Officers of the Stazione Zoologica for their never 

 failiug courtesies to me, as well as to my fellow countrymen who 

 bave occupied Oxford and British Association Tables at their 

 Aquarium. 



Historical. 



The discovery of Mnestra was one of the aehievements of the 

 three naturalist friends Gegenbaur, Kölliker and Heinrich Müller 

 during their sojourn at Messina for the jìurpose of becoming more 



3* 



