406 ‘Rey. W. A. Leighton on the Determination of the ~ 
Lower Austria (Dr. Holzinger), Algeria (Mr. G. Bentham), 
Genoa (Prof. DeNotaris) ; and, in Great Britain, from Gilton 
Point, Tenby, South Wales, and Haughmond Hill, Shropshire. 
2. C. cervicornis, Scher. (E. Bot. t. 2574) = Scher. L. H. 
457; M.& N.749; Bohl. Br. Lich. 88; Anzi, C.C. 12,18, 19; 
Mudd, L. Br. 9. 
Under this name two plants, alike externally, have been com- 
prised hitherto, but must now be separated as distinct species. 
The one has the reaction K +, the other is destitute of reaction, 
K—. Dr. Nylander (in ditt.) mforms me that the C. cervicornis 
of Délise’s herbarium in the Jardin des Plantes, Paris, has K+, 
whilst the C. sobolifera of the same herbarium has K—, 
and to this latter Coém. Cl. Belg. 14, 15, 16 are referable. 
The C. cervicornis K+ is, of course, kept distinct from gracilis 
and verticillata by the reaction. 
I possess this plant also from Bruyéres (Scherer), from 
Gotteborg and Christiania and Klippan, from ? Abbé Coémans (as 
“ C. degenerans v. basima, Nyl. L. Scand. 54”), and from Shrop- 
shire, Yorkshire, and Barmouth, North Wales. 
3. C. cariosa, Flk. (EK. Bot. Suppl. t. 2761) =Fr. L.S. 149 (fide 
specim. a Nyl.); Fellm. Lapp. 27; Coém. Cl. Belg. 20; M. & 
N. 850; Massal. L. Ital. 54; Anzi, C. C. 4; Hepp. 541, 542 ; 
Scher. L. H. 510; Richardson, Arctic Amer. Lich. 10. 
I possess this also from Upsal (Dr. T. M. Fries), Holm (Dr. 
Nylander), and from near the 49th parallel of latitude, Oregon 
Boundary Commission (Dr. Lyall). 
The reaction K+ keeps this quite distinct from C. pyzxidata, 
K—. 
4. C. lepidota (Ach.)=Fellm. Lapp. 35. This Acharian var. 
of degenerans has K+, and, in Dr. Nylander’s opinion, ought 
probably to be distinguished as a distinct species. 
5. C. eemocyna, (Ach.) Syn. p. 261=Fellm. Lapp. 28, 29; 
Anzi, C. C. 104 &B (in part); Scher. L. H. 65. 271. 
I have it also from Peklin (Dr. Harslingsky). Dr. Nylander 
(in litt.) remarks that this species grows as far as Greenland and 
Siberia. It is distinguished from gracilis by the reaction. 
6. C. dactylota, Tuck. = Wright’s Lich. Cub. 30. Distin- 
guished from fimbriata, gracilis, and botrytes by reaction (K +), 
but may be probably added as a form to eemocyna. 
7. C. turgida, Hoffm. = Fr. L. 8. 147 (fide specim. a Nyl. & 
T. M. Fries); Fellm. Lapp. 87; Tuck. L. Am. Sept. 24. 
This also may be added to ecmocyna as a state. 
8. C. pungens, Fr. (Dill. t. xvi. f. 80) = Fr. L. 8. 318 (fide 
Nyl.); Scher. L. H. 459; M. & N. 754; Bohl. Br. Lich. 23; 
Coém. 1035; Cl. Belg. 189; Bourgeau, Pl. Can. 605; Mudd, 
Br, Clad. 54, 55,56; Anzi,C.C.24; Leight. Exs. 16, 369, 374; 
