IIO CUMMINGS 



Fox (Trelease, 997, 998). This species has been reported from 

 Greenland and British Columbia. In Alaska it has been discovered 

 on Chernofski Island, Unalaska, and Belkofski, Alaska Peninsula, by 

 Dr. Bean. 



ADDITIONAL SPECIES. 



The following species were collected by Dr. Almquist and determined 

 by Nylander : Lecanorafuscolutea (Diks.) Nyl., L. ccesiorufa (Ach.) 

 Nyl., on earth and moss only; L. contractula Nyl., L. subradiosa 

 Nyl., Z. atrynea Ach., Z. atrynea forma cenisia Ach., Z. epiglypta 

 Norl., Z. subradians Nyl., Z. lacustris (With.) Nyl., Z. fuscata 

 (Schrad.) Nyl., on rock only; Z. lobulata (Sommerf.) Nyl. and Z. 

 crenata Nyl., on earth and on rock; all collected on St. Lawrence Is- 

 land. The following species were collected by Dr. Almquist at Port 

 Clarence: Z. tetraspora Nyl., Z. stillicidiorum forma chloroleuca 

 (Sommerf.) Nyl., Z. ccesiorufella Nyl., Z. pyracea ramulicola Nyl., 

 Z. mniarcea Ach., Z. mniarcea pachnea Ach., Z. hypnorum deau- 

 rata (Ach.) Nyl., Z. epibrya Ach., Z. chlarona Ach., Z. stibintri- 

 cata Nyl., Z. upsaliensis (L.) Nyl., Z. incequatula Nyl., Z. gya- 

 lectina Nyl., all growing on the earth or upon moss (Z. tartarea 

 upsaliensis is reported from Kotzebue Sound by Hooker and Arnott) ; 

 Z. pyracea (Ach.) Nyl., Z. irrubata (Ach.) Nyl., Z. disceptans 

 Nyl., Z. umbrina (Ehrnb.) Nyl., Z. ochromicra Nyl., Z. quadrup- 

 lans Nyl., L.suaveolens (Ach.) Nyl., Z. lavata var. Candida Anzi, 

 Z. belonioides Nyl., all rock forms. Z. stillicidiorum (Oed.) Nyl. 

 was found growing upon earth and moss, both at St. Lawrence Island 

 and at Port Clarence. Z. smaragdula (Whlnb.) Nyl. was found 

 growing upon rock on St. Lawrence Island. Nylander, in his correc- 

 tion of Rothrock's list, states that Z. cervina should be called Z. sma- 

 ragdula. Z. ventosa (L.) Ach. was collected by Wright on the is- 

 lands of Bering Strait, by Macoun on rocks on St. George Island, and 

 reported by Hooker and Arnott for Kotzebue Sound. In Rothrock's 

 list, based upon Dr. Bean's collection, the following additional species 

 are found : Z. glaucomela Tuck., no definite locality given; Z. sub- 

 fusca hypnorum Schaer., Port Clarence and Cape Lisburne also 

 collected by Wright on the islands of Bering Strait; Z. cervina (Pers.) 

 Nyl., Eschscholtz Bay, Arctic Ocean; Z. cervina discreta Sommerf., 

 Port Clarence ; and Z. verrucosa (Ach.) Laur., Eschscholtz Bay, Arc- 

 tic Ocean. Dr. Cooley has collected two additional species : Z. elatina 

 ochrophcea Tuck., at Sheep Creek, near Juneau, and Z. pallescens 

 rosella Tuck., in the same locality. Mr. William Palmer collected 

 Z. thamnitis Tuck, on St. Paul Island. Mr. J. M. Macoun has made 



