A. W. Evans — Arrangement of Genera of HepaticoB. 277 



101. Cryptomitrium Aust. in Uaderw. Cat. Hep. p. 36 (1884). 

 Species 1, G. tenerum of Mexico and California. 



103. Asterella Beanv. in Encycl. raeth. suppl. i, p. 502 (1810): Dum. Hep. Eur. 

 p. 15-4: Underw. Cat. Hep. p. 37. 

 Reboulia Raddi in Opusc. scient. d. Bot. ii, p. .56 (1818): G. L. & N. Syn. Hep. p. 

 547. 



A small genus of wliich the typical species is A. hemisphcerica of 

 Europe and North America. 



103. Askepas Griff. Notula;, p. 341 (1849): Mitt. Jour. Linn. Soc. v, p. 127. 

 Species 1, A, hrevipes of India. 



104. Dumortiera Nees in Nov. Act. Acad. Cass. Leop. xii, P. ], p. 410 (1823): 

 G. L. & N. Syn. Hep. p. 542. 



Species 5-10, scattered ; the typical D. hirsuta is found in both 

 Europe and America. 



105. Rhacotheca BisehofE in Hochst. & Scub. Fl. Azor. p. 12, t. 14 (1846): G. 

 L. & N. Syn. Hep. p. 573. 



Species 1, H. Azorica. 



TRIBE II. LUNULARIE^. 



106. LiUnularia Mich. Nov. Gen. p. 4 (1729): G. L. & N. Syn. Hep. p. 510. 

 Species 1, the common L. vulgaris. 



107. Aitonia Forster, Char. gen. pi. p. 147, n. 74 (1776): Lindb. in Act. Soc. Sc 

 Fenn. x. 



Otiona Corda in Opiz. Naturl. i, p. 648 (1829): Dum. Hep. Eur. p. 148. 

 Plagiocha.sma Lehin. et Lindenb. in Lehm. Pug. pi. iv, p. 13: G. L. & N. Syn. 

 Hep. p. 511. 



Species 15-20, mostly in warm regions. 



TRIBE III. TARGIONIE^. 



108. Targionia Mich. Nov. Gen. p. 3 (1729): G. L. & N. Syn. Hep. p. 574. 



A small genus, most frequent in warm countries ; the original T. 

 hypophijlla occurs in Europe and America. 



109. Cyathodium Kunze in Lehm. Pug. pi. vi, p. 17 (1834) : G. L. & N. Syn. 

 Hep. p. 577. 



Synhymenium Griff. Notulag, p. 344 (1849): Mitt, in Jour. Linn. Soc. v, p 124. 

 (See Stephani in Hedwigia, xxvii, p. 250.) 



Monoselenium Griff. 1. c. p. 341 : Mitt. 1. c. p. 127. 



Species 1, the tropical C. cavernosuni. 



