A. W. Evans — Arrangement of Genera of Hepaticm. 267 



20. 'BaZZSHiia, S. F. Gray, Nat. Arr. Br. PI. i, p. 704 (1821): Spruce, Hep. Amaz. 

 et And. p. 366 : Underw. Cat. Hep. p. 82. 

 Pleuroschisma, sect. Pleuroschismotypus Dum. Syll. Jung. p. 70 (1831). 

 Pleuroschisma Dum. Rev. des Genres, p. 19 (1835); Hep. Eur. 102. 

 Herpetium, sect. Mastigobryum Nees, Hep. Eur. iii, p. 43. 

 Mastigobryum Nees in G. L. & N. Syn. Hep. p. 214. 



Species 100-125, especially numerous in tropical regions ; the com- 

 monest northern species is B. trllohata S. F. Gray. 



31. Sprucella Stejih. in Engler's Bot. Jahrb. viii, p. 92 (1887); Hedwigia, xxx, p. 

 215. 



Species 1, S. siiccida {Lepidozia sitccida Mitt.) of western Africa. 



22. Lepidozia Dum. Rev. des Genres, p. 19(1835); Hep. Kur. p. 109: G. L. & 

 N. Syn. Hep. p. 200. 



Pleuroschisma, sect. Lepidozia Dum. Syll. .Jung. p. 69. 

 Herpetium, sect. Lepidozia Nees, Hep. Eur. iii, p. .^1. 



Species 50-75, most abundant in tropical regions ; the typical L. 

 reptans Dum. is the most frequent northern species. 



23. Arachniopsis Spruce, " On Cephalozia " (1882); Hep. Amaz. et And. p. 354. 

 Contains 3 South American species. 



24. Cephalozia Dum. Rev. des Genres, p. 19 (1835); Hep. Eur. p. 87: Spruce, 

 "On Cephalozia"; Hep. Amaz. et And. p. 388. 



Jungermannia, sect. Cephalozia Dum. Syll. Jung. p. 60. 

 Jungermamiiee sp. G. L. & N. Syn. Hep. p 131. 

 Zoopsis Hook. f. & Tayl. Crypt. Ant. p. 55 (1845). 

 Trigonanthus Spruce, Trans. Bot. Soc. Edin. iii, p. 207 (1850). 



A widely distributed genus of 40-50 species ; it may be divided 

 into the following subgenera (most which wei*e first proposed by Dr. 

 Spruce) : — Protocejihalozia, Pteropsiella, Zoopsis, AlobieUa, Euce- 

 phalozia, CepJialoziella, and Prionolohus. 



25. Herpocladium Mitt, in Jour. Linn. Soc. xv, p. 69 (1877). 

 A small genus of the South Pacific. 



26. OdontOSChisma Dum. Rev. des Genres, p. 19 (1833). 

 Pleuroschisma, sect. Odontoschisma Dum. Syll. Jung. p. 68. 

 Sphagnoecetis Nees in G. L. & N. Syn. Hep. p. 148 (1845). 

 Cephalozia, sect. Odontoschisma Spruce, "On Cephalozia." 



Species 10-15, scattered ; the typical 0. Sphagni occurs in both 

 Europe and America. 



27. Hygrobiella Spruce, "On Cephalozia" (1882). 



Species 3, — H. laxifolia, H. tnyriocarpa and H. -N'evicensis, all of 

 northern regions. 



Trans. Conn. Acad., Vol. VIII. 36 Jan., 1892. 



