372 BOTANICAL GAZETTE [NOVEMBER 
Macoun,‘ but there is apparently no printed record of its having 
been collected a second time. 
In the writings of certain Scandinavian bryologists, however, 
are a few references to a small arctic hepatic which agrees 
closely with the pale type specimens of O. Macounti and which is 
doubtless referable to Austin’s species. This plant was first col- 
lected by Berggren in 1868 at King Bay on the island of Spitz- 
bergen, and was described by him in 1875 under the name 
Sphagnoecetis communis var. tessellata’ In a second paper, also 
published in 1875,° he recorded the plant from Disco Bay on the 
western coast of Greenland, where he had collected it five years 
previously. This time it appears as Jungermannia tessellata, show- 
ing that he was not altogether certain as to its systematic posi- 
tion. Under this latter name the Greenland specimens are 
mentioned by Lange and C. Jensen? in 1887, and by Underwood® 
in 1892. In 1898 Kaalaas® recorded the species from Norway; 
he recognized in it an Odontoschisma, but referred it, as Berg- 
gren orginally did, as a var. ¢essellata to O. Sphagni. In the same 
year C. Jensen*® published excellent figures of the plant under 
the name 0. ¢essellatum. The specimens from which his figures 
were drawn were collected by Hartz at Scoresby Sound, on the 
eastern coast of Greenland, well within the Arctic Circle. Herr 
Jensen has kindly sent me two East Greenland specimens of his 
O. tessellatum, which were collected by Dusén in 1899,” and I 
have also been able to study Norwegian specimens collected and 
communicated by Herr Jérgensen. These specimens have served 
for comparison with Austin’s type of O. Macounii. Additional 
specimens from Yukon, collected by Williams, and from northern 
Minnesota, collected by Holzinger, have also been examined. It 
is clearly seen, therefore, that the geographical distribution of 
O. Macounii is much more extensive than the published records 
would seem to indicate. 
4Cat. Canadian Plants 7:32. 1902, 5 Kongl. Sv. Vet. Akad. Handl. 137: IOI. 1875. 
2. a xa tga. 1875. 8 Bot. Gaz. 17: 311. 1892. 
7Meddel. om Gronland 3: 411. 1887. 9 Vidensk. Skrift. I. 18989: 14. 
*° Meddel. om Gronland 15:369. f. 7-¢. 1898. 
* Cf. C. JENSEN, Ofvers. k. Vetensk.-Akad. Férh. 57:797. 1900. 
