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614 Evans: REPORT ON THE HEPATICAE OF ALASKA 
already noted by the writer (3, p. 288), have disappeared, so 
that it is impossible to determine upon which species his record 
was based. 
3. Chiloscyphus polyanthus (L.) Corda (Evans, 3, p- 306). 
The report was based on very fragmentary specimens which, in 
view of the recent critical work done on the genus Chiloscyphus, 
are hardly in a condition to be determined. 
4. Lepidozia setacea (Web.) Mitt. (Evans, 3, p. 308). The 
specimens listed belong to the subgenus Microlepidozia but are 
unfortunately sterile; their reference to a definite species is there- 
fore uncertain. 
4. Frullania Tamarisci (L.) Dumort. (Gottsche, Lindenberg, 
and Nees von Esenbeck, 5, p. 439). This species has not been 
collected recently in the Pacific Coast region. The specimens 
recorded in the Synopsis Hepaticarum are referred to the variety 
laxa, and possibly belong to F. nisquallensis. Unfortunately 
they have not been accessible to the writer. 
DISCUSSION OF THE HEPATIC FLORA OF ALASKA 
The general features of the hepatic flora of Alaska have already 
been pointed out by the writer (3, p. 289). In the northern part 
of the territory the flora is essentially like that of other northern 
regions; in the southern and southeastern parts the northern 
species become mingled with species characteristic of the Pacific 
Coast region of North America. The predominance of northern 
elements.is apparent from the fact that sixty-nine of the species 
known from Alaska occur also in northern Europe and Asia, 
eighteen occur in northern Europe but have not yet been reported 
from Asia, while one, Diplophyllum plicatum, occurs in northern 
Asia but is unknown in Europe. Of the remaining eighteen species 
seventeen are Pacific Coast species and one, Lepidozia sandvicensts, 
occurs also in the Hawaiian Islands. 
The seventy-one species common to both Europe and Asia are 
circumpolar in their distribution with the exception of Metzgerta 
hamata, Anastrepta orcadensis, and Pleurozia purpurea. These 
three species, although found in northern Europe, are limited in 
Asia to tropical regions, so far as known at the present time. 
Although it is hardly advisable to give a complete list of the cir- 
