No. 473] 



NOTES ON LEPTOPHRYS 



more attenuated until at the 

 end of 35 mniutes there was 

 the merest strand of proto- 

 plasm connectmg the two 

 parts, which had now moved 

 500 micra apart. This strand 

 suddenly snapped and the 

 frao;ments moved awav as two 

 new individuals. While this 

 process was going on one of 

 the parts ingested a Chlamy- 

 domonas. Except for this 



ingesta within the dividing 

 protoplasm. 



These observations seem to 

 afford reasons for setting aside 

 Hertwig and Lesser's two spe- 

 cies, L. cincrea and L. elegans; 

 and the fact that, although 

 there was ample opportunity 

 to demonstrate nuclei such as 

 Hertwig and Lesser describe 

 as seen in part of a single in- 0-^ 

 dividual, no evidence of their 

 presence was obtained, leads 

 to the conclusion already sug- 

 gested by Penard that the genus 

 Leptophrys is but a synonym 

 for a species of Vampyrella. 



The variation in the form 

 of the cysts of this Vampvivlhi 

 and the two cases of hi nan 

 fission, independently obstM vc.l 

 byMr.Lapham ami myself in 

 this 



