CHILEAN SPECIES OF METZGERIA. 279 



extreme displacement noted above (Fig. 1, B), some of the hairs 

 being three or four cells distant from the margin; but it is only on 

 the narrowest wings that they are scattered over the entire ventral 

 surface. The writer feels, therefore, that these specimens, although 

 at first sight so striking, can not be separated specifically from M. 

 frontipilis. They apparently represent a xerophytic modification 

 of the species, both the narrow wings and the abundant hairs being 

 in accordance with this view. It may be noted also in this connection 

 that M. jmbescens sometimes produces thalli with exceedingly narrow 

 wings. Specimens showing this feature in a marked degree were dis- 

 covered by Kaalaas near Christiania, Norway, and distributed by 

 Schiffner in his Hepaticae Europaeae, No. 21, as forma atienuata. 

 On some of the ultimate branches the wings are so strongly narrowed 

 that they almost disappear, and the thalli thus accpiire an appearance 

 very different from that of typical M. pvhescens with its broad wings. 



2. Metzgeria decrescens Steph. 



Metzgeria decrescens Steph. Bull. Herb. Boissier 7: 932. 1899. 

 Metzgeria terricola Steph. op. cit. 933. 1899. 

 Metzgeria longiseta Steph. op. cit. 934. 1899. 

 Metzgeria Dusenii Steph. op. cit. 942. 1899. 



Specimens examined: valley of the Aysen River, January, 1897, 

 Dusen 416 (M., Type; Moll., St., Y., as M. glaberrima, and listed 

 under this name by Stephani, 20, p. 20) ; Newton Island, May, 1896, 

 Dusen 113 in part (B., as M. terricola, and listed under this name by 

 Stephani, 19, p. 934; St., U., as M. Dusenii); southern part of 

 Smith Sound, near the western entrance to the Straits of Magellan, 

 1883, Gortner, mixed with Riccardia fucgiensis and other bryophytes 

 (Y., specimen received from the Warnstorf Herbarium); Alert Bay, 

 western coast of Patagonia, 1882, Coppinger (N. Y.); Churucca, 

 Desolation Island, Savaiier (B., presumably the type of M. terricola, 

 but listed as M.furcata var. decipiens by Bescherelle & Massalongo, 2, 

 p. 246) ; Puerto Angosto, Desolation Island, March, 1896, Dusen 159 

 in part (M., St., U., type of M. Dusenii); Straits of Magellan, 

 July, 1885, collector unnamed (B., type of M. longiseta, specimen 

 received from the Warnstorf Herbarium) ; Cape Horn, Hooker, mixed 

 with M. decipiens (M.). 



The following additional station may be cited from the literature: 

 Corral, Dusen (20, p. 19, as M . Dusenii). 



In his monograph of the genus Metzgeria (19) Stephani divides the 



