(xii) 



NOTE ON THE ILLUSTRATIONS. 



THE figures on all the plates in this volume, except Plates 

 XXXI and XXXII, are photographic reproductions of draw- 

 ings by Mr. Cash, and have been re-arranged since their 

 receipt from him. 



Most of the figures in the text have been selected from 

 drawings by Mr. Cash, or by Prof. G. S. West (as stated) ; 

 21, stated to be "after" an author, have been photographed 

 direct from published figures ; 5 with a similar statement 

 (figs. 46, 48-50, and 72) have been re-drawn by Mr. Cash ; 

 and 12 (figs. 52, 54, 61-64, and 105-110) have been similarly 

 drawn by me. 



All the illustrations, except the two lithographed plates 

 named above, have been executed by Messrs. Andre and 

 Sleigh, Ltd., of Bushey, Watford. 



J. H. 



COEEIGENDUM TO VOL. I. 



Ouramoeba vorax, p. 83. 



IT was the intention of Mr. Cash to state in the present 

 volume that he had become convinced that the " non-coutrac- 

 tile protoplasmic filaments," on the presence of which the 

 genus Ouramoeba was founded by Leidy, had been proved to 

 be merely parasitic filamentous algae, as in Penard's Amoeba 

 nobilis mentioned on p. 85. The genus therefore falls, and 

 the species (vorax) may be only a form of Amoeba proteus. 



This question was discussed by Dr. Penard in 1902 in his 

 'Faune Rhiz. du Leman/ pp. 67-69, and again in 1905 in 

 the ' Revue Suisse de Zool.,' vol. xiii, pp. 587-588. 



