VOL. IV.] Recent Literature. 309 



upon the shell of Nenia, where it formed deep-green spots and 

 was very conspicuous. This species, which shows several 

 differences from T. IVelckeri, hitherto the only know species of 

 this genus, is described as new and named 7". ATenice L,agerh; 

 it was collected in Ecuador. 



It seems more than probable that the occurrence of these 

 Algse upon living animals is a matter of protection; we remem- 

 ber for instance the numerous constellations that occur on the 

 bottom of the sea, where Crustacea: Hyas and others are walk- 

 ing around, covered with a whole forest of Algae, Hydrozoa, 

 etc., so that the Hyas itself is hardly visible. 



G. DE lyAGERHEiM: The glacierfiora in Ecuador.'^ 



The summits of all the higher volcanoes of Ecuador are covered 

 with snow, which persists through the summer. This snow is 

 hard like ice, but is, nevertheless, inhabited by a flora, of which 

 the author gives a very interesting sketch in the present paper. 

 It was especially some earlier investigations upon the same 

 flora, but from collections made in the arctic region, which 

 induced the author to secure material from the volcanoes 

 in Ecuador; these earlier studies were made by Berggren and 

 Wittrock, and by the author himself. 



The material was collected upon the snow, which showed the 

 well-known phenomenon of having a deep pink color, the 

 so-called "red snow," and the author enumerates several 

 cryptogames, especially Algse, as representatives of this singular 

 vegetation. 



Chlamydomonas sangiiinea, C- asterosperma, C. glacialis, 

 Raphidonema nivale, Selenotila nivalis are described and figured 

 as new, and the species of Chlamydomonas were the most fre- 

 quent forms in the red snow. Some other genera were also 

 represented, as for instance: Bichatia, Nostoc, Navicula, Mesot^e- 

 nium, Gloeocystis and others. Of Fungi were observed Chy- 

 tidrium and the new genus Selenotila, while Philodina roseola^ 

 which occurred together with the red Chlamydomonades, was the 

 only representative of the animal kingdom. 



* Die Schneeflora dei Pichincha. Ein Beitrag zur Kenntniss der nivalen 

 Algen und Pilze. (Berichte d. deutsch. bot. Gesellschaft, Berlin, 1892. 

 Vol. 10, Hefts, p. 517.) 



