154 Alexander W. Evans, 



same size; the branches show but httle differentiation and are 

 biconvex in section and usually rounded at the ends ; the male 

 inflorescences are much the same; and the clusters of archegonia 

 are surrounded by lobe-like divisions. R. fuscobrunnea, however, 

 is more copiously branched, the branches being often crowded 

 together ; and the cells are considerably larger, as the measure- 

 ments given indicate. 



13. RiCCARDIA SPINULIFERA MaSSal. 



Riccardia spinulifcra Massal. Nuovo Gior. Bot. Ital. 17: 254. 



pi. 26, f. 33. 1885. 

 Spinella magellanica Schiffn. & Gottsche in Schiffner, V., For- 



schungsreise "Gazelle" 4*: 42. pi. 8, f. 17-19. 1890. 

 Aneura spimtlifera Steph. Hedwigia 32: 138. 1893. 



Specimens examined: dense forest of Fagus betuloides, 

 Tuesday Bay, Straits of Magellan, 1876, Naumann (S., Y., type 

 of Spinella viagellanica). 



The species has been reported from the following additional 

 localities: Mt. Sarmiento, Tierra del Fuego, and Basket Island, 

 Spegazzim (16, p. 255, including type) ; Desolation Island, 

 Savatier (2, p. 244) ; Newton Island, Dusen (29, p. 19, as Aneura 

 spinulifera) . 



In size and method of branching R. spinulifera resembles R. 

 alcicornis, but the remarkable appendages described below will at 

 once distinguish it, not only from R. alcicornis and its allies, but 

 from all the other known species of Riccardia. The dried plants 

 are a pale brownish green in the younger portions and a darker 

 brown in the older. They apparently grew in loose tufts, often 

 in admixture with other ]jryophytes, and produced neither stolons 

 nor rhizoids. In all probability they were prostrate in habit, 

 perhaps with ascending tips, but the scanty material available for 

 study leaves this point in doubt. 



The main axis, which is mostly 0.5-1.5 cm. long, 0.25-0.3 mm. 

 wide and 0.18-0.2 mm. thick, continues its growth indefinitely. 

 Although slightly flattened, the edges are rounded and show no 

 indications of wings or differentiated marginal cells. The median 

 portion is usually ten to twelve cells thick, and all the cells have 

 slightW thickened and often pigmented walls, the walls of the 

 interior cells being thinner than the others. The cells of the sur- 



