304 EVANS 



sparingly toothed : leaf-cells with thin walls and minute but distinct 

 trigones ; cuticle delicately striate-verruculose. 



22. Lophozia inflata (Huds.) M. A. Howe. 

 Kadiak (C. «& K. 1426). New to Alaska. 



23. Lophozia heterocolpa (Thed.) M. A. Howe. 



Port Wells (B. & C. mixed with 652 and 654). New to Alaska. 



24. Lophozia attenuata (Lindb.) Dumort. 

 Virgin Bay (T. 1474, in part). New to Alaska. 



25. Lophozia quinquedentata (Huds.) Schiffn. 



St. Matthew Island (T. 14S0, 1519, in part, 2161, in part). New 

 to Alaska. 



26. Lophozia floerkii (Web. & Mohr) Schiffn. 



Orca (T. 1529, in part), Port Wells (T.). New to Alaska. 



27. Lophozia quadriloba (Lindb.). 



Jungerviannia quadriloba Lindb. ; Lindb. & Arnell, Kongl, Sv. Vet. Akad. 

 Handl. 23, no. 5: 55. 1889. 



Hooniah Village (C. & K. 665). New to Alaska. 



This distinctly arctic and alpine species has not before been recorded 

 from the American continent : it is now known from various parts of 

 northern Europe including the island of Spitzbergen, from Styria, 

 from Siberia, and from Greenland. The Alaskan plants agree closely 

 with Norwegian specimens collected by Dr. Arnell. Lindberg's de- 

 scription is so full that I give here simply an account of the leaves and 

 underleaves, drawn from the sterile Alaskan material : leaves remote 

 or imbricated, almost transversely inserted, widely spreading from the 

 base, almost erect in the upper half, lobed to about the middle with 3 or 

 4 (rarely only 2) acute or obtuse, triangular lobes separated by narrow 

 sinuses ; margins mostly entire, but bearing at the base, both antically 

 and postically, a very few (usually only one or two) small, variously 

 curved cilia, mostly 6-10 cells long and 1-3 cells wide at the base : 

 underleaves deeply bifid with triangular-subulate, long-acuminate lobes 

 separated by a narrow sinus ; basilar cilia similar to those of the leaves : 

 leaf-cells with thick walls and distinct, slightly bulging trigones ; cuti- 

 cle densely covered with coarse verrucas, circular or oval in outline or, 

 near the base of the leaf, tending to be elongated ; cells at the edge of 

 the leaf 14^1 in diameter, in the middle 17 // and at the base 30X 17 ytt. 



The nearest relative of Lophozia quadriloba is perhaps L. Jlocrkii, 

 which differs in its larger size, in its obliquely inserted and less deeply 



