Plate X. Leaves X 40. Cells cross-section of stem X 280. 



Fig. I. Stereodon plicatulus Lindb., Yukon, Lake Lindeman, 



R. S. Williams. May 30, 1898. 

 Fig. 2. S. plicatulus, Lindb., Jenisei , Siberia, Arnell, Sept. 18, 1876. 

 Fig. 3. 5. revoliitus Mitt., Kongsvold. Dovre, Norway, S. O. Lindberg,, 



July 8, 1882. 



Fig. 4. S. plicatulus, Lindb., Jenisei , Siberia, Arnell, Sept. 13, 1876. 



Fig. 5 S. callichroimi Brid , Naes, Norway. C. Rosenberg, Aug. 6, 1854. 



STEREODON PLICATULUS LINDB. 



By Harald Lindberg. 

 In the last number of The Bryologist (May, 1903), p. 42-43, is to be 

 found an article " Notes on Nomenclature, II.," by Elizabeth G. Britton, in 

 which Mrs. Britton writes that I recently have examined specimens of 

 Stereodon plicatulus Lindb. collected by Arnell in Siberia, and pronounced 

 this species to be the same as Stereodon revolutus Mitt. In November, 

 1900, I received from Mr. R. S. Williams a specimen collected by him (May 

 30, 1898) at Lake Lindeman in the Yukon Region, Fig. i, and sent with the 

 following inscription: " Hypnu?n subplicatile (Lindb.) Limpr.?" This 

 moss I examined and found it identical with specimens of Stereodon plica- 

 tulus Lindb. {Hypnum subplicatile (Lindb.) Limpr.) collected by Arnell at 

 Jenisei in Siberia, Fig. 2. I have never said that Stereodon plicatulus 



