A. W.Evans — Arrangement of Genera of Hepaticm. 2*75 



TRIBE X. METZGERIE^. 



86. MetZgeria Raddi, Jung. Btr. in Mem. Moden. xviii, p. 45 (1820): Dum. Rev. 

 des Genres, p. 26; Hep. Eur. p 138: G. L. & N. Syn. Hep. p. 501. 



Pasciola Dum. Comm. bot. p. 114. 



Echinogyna Dum. Anal. fam. p. 60; Syll. Juug. p. 83. 



Lindberg enumerates 11 species in liis monograpli of the genus ; 

 the original 31. furcata and M. puhescens are common in Europe. 



TRIBE XI. ANEURE^. 



87. Aneura Dum. Comm. bot. p. 115 (1822); Syll. Jung. p. 85; Rev. des Genres, 

 p. 26; Hep. Eur. p. 140: G. L. & N. Syn. Hep. p. 493. 



Rcemeria Raddi, Jung. Etr. in Mem. Mod. xviii, p. 46, not Roemeria Medik. 

 Riccardia S. F. Gray, Nat. Arr. Br. PI. i, p. 683 (1821), not Richardia Kantli 

 in Mem. Mus. Paris, iv, p. 430 (1818). 



Sarcomitrium Corda in Sturm Deutschl, Fl. 2 fasc. 26 and 27, p. 119. 



The genus inchides the following, — 

 Acrostolia Dum. Rev. des Genres, p. 26 (Pseudoneura Gottsche, Mexik. Leverm.). 



A widely distributed genus of 20-30 species, the typical A. pinguis 

 occurring in Europe and America. 



ORDER II. ANTHOCEROTACE^. 



88. DendrocerOS Nees in G. L. & N. Syn. Ilep. p. 579 (1846). 

 Species 10-15, mostly tropical. 



89. AnthoceroS Mich. Nov. Gen. p. 11 (1729): G. L. & N. Syn. Hep. p. 582. 

 Species 20-30, most numerous in tropical regions ; A. keels and 



A. punctatus are the commonest northern species. 



90. Notothylas Sulliv. Mem. Am. Acad. n. ser. iii, p. 65 (1846): Dum. Hep 

 Eur. p. 161. 



Carpolipum Nees in G. L. & N. Syn. Hep. p. 591. 

 Chamaeceros Milde in Nov. Act. N. C. (1856). 



A small genus of Europe and North America ; N'. orbicularis 

 Sulliv. is an original species. 



ORDER III. MARCHANTIACE^. 

 TRIBE I. MARCHANTIE^. 



91. Marchantia Marchant. f. in Act. Gall. (1713): G. L. & N. Syn. Hep. p. 521 . 

 Dum. Hep. Eur. p. 150. 



Widely distributed ; species 25-30 ; 31. polytnorpha L. ' is the 

 commonest. 



Trans. Conn. Acad., Vol. VIII. 37 Jan., 1892. 



