52 The Microscope. 



New Protozoa. — Dr. O. Nusslin has recently described (Z. 

 w. Z., xl., p. 697, 1884) four new Protozoa. Zonomyxa vio- 

 lacea, Vaginicola butschlii, Epistilis ophrydiiformis and Am- 

 phitrema stenostoma, from the fresh-waters of Germany. He 

 also adds some notes upon the encystment of Amoeba. His 

 account is detailed, and embraces the life histories of the forms 

 described. Zonomyxa is a new genus placed near Amphizo- 

 nella and Pelomyxa, among the Rhizopods. It resembles the 

 former in its pseudopodia, color and envelope ; it agrees with 

 the latter in the vacuolation of the protoplasm, size and struc- 

 ture of nucleus, etc. * 



Prof. E. Ray Lankester describes a new genus belonging 

 to the Monera, under the name Archerina (Q. J. M. S. xxv., p. 

 61, 1885). It has no nucleus, but in its place a nucleus-like 

 chlorophyl corpuscle. It forms large colonies and lives (in 

 England) among desmids and other chlorophyl-containing algae. 

 Prof. Lankester maintains that this is not a case of symbiosis, 

 that the green is not a plant living in full sympathy with a 

 protozoon. 



Frederick, Count von Stein, the celebrated zoologist and 

 author of the valuable work Die Organismus der Infusions- 

 thiere, died at Prague January 9th, at the age of 67. He was a 

 most careful worker, and his drawings of the minute animals 

 which were his favorites, have never been excelled in grace or 

 accuracy. His views upon the relationships of these forms were 

 based upon a thorough knowledge of their structure and life 

 history, and American students of the Infusoria would do well 

 to follow his guidance rather than the more commonly quoted 

 manual of Saville-Kent, a work which does not well bear criti- 

 cism. 



The junior editor acknowledges the receipt of a most ele- 

 gant self-centering turn-table ; the gift of the inventor, Mr. E. 

 H. Griffith. It is an improvement of the form illustrated in 

 the catalogue of Messrs. Bausch and Lomb, under No. 1245. 

 It has an extra attachment for decentering the slide, at once 

 simple and convenient. 



