EVANS : HEPATIOE COLLECTED IN SOUTHERN PATAGONIA. 53 



39. MARSUPIDIUM URVILLEANUM (Mont.) Mitt, in Hook. f. Handb. N. 



Zeal. Fl. 754. 1867. 



Plagiochila urvilleana Mont. Ann. des Sc. Nat. II. 19: 247. 1843. 

 Scapania urvilleana Mont, in G. L. & N. Syn. Hep. 63. 1844. 

 Jnngeruiatmia tirvilleana Hook. f. & Tayl. Lond. Jour. Bot. 3: 468. 



1844. 



Gymnanthe iirvilleana Tayl. in G. L. & N. Syn. Hep. 193. 1845. 

 Acrobolbus urvilleamts Trevis. Mem. reale 1st. Lomb. di Sci. e Lett. III. 



4: 423. 1877. 

 Jniigenuannia abbreviata Hook. f. & Tayl. Lond. Jour. Bot. 3: 374. 



1844. 



Plagiochila abbreviata Tayl. in G. L. & N. Syn. Hep. 646. 1847. 

 Fuegia. 



40. METZGERIA FRONTIPILIS Lindb. Acta Soc. pro Faun, et Flor. 



Fenn. i: 14. f, 2. 1877. 



Fuegia. (W. Magellan, Savatier.) 



41. MYLIA ABDITA (Sulliv.). 



Plagiochila abdita Sulliv. in Hook. Jour. Bot. and Kew Gard. Misc. 2: 



317. 1850. 

 Leioscyphus pallens Mitt. Jour. Linn. Soc. 15: 68. 1877. 



Lapataia. 



The type of Plagiochila abdita is not to be found at present in the 

 Sullivant Herbarium, but there is a drawing of the species there, which 

 agrees very closely with the Lapataia specimens and also with the pub- 

 lished descriptions and figures x of Leioscyphus pallens. The two genera, 

 My Ha and Leioscyphus (or Leptoscyphus], are both given places by Schiff- 

 ner 2 in his recent treatment of the genera of Hepaticae. He recognizes, 

 however, that they are very close to each other and points out only two, 

 purely vegetative, characters to distinguish them : in Mylia the leaves are 

 said to be alternate and the underleaves undivided; whereas in Leioscy- 

 pJius, the leaves are said to be opposite and the underleaves bifid. The 

 first distinction, however, does not hold, as there are acknowleged species 



1 Mitten, Botany of Kerguelen Island: Transit of Venus Expedition, //. j. f. 6. 1874. 

 Schiffner and Gottsche, Lebermoose der Forschungsreise S. M. S. " Gazelle,"//, j. f. 4, 5. 1890. 



2 Engler & Prantl, Nat. Pfl. Fam. i. 3. pp. 89, 90. 1893. 



