The Genus Riccardia in Chile. 131 



a photosynthetic branch might do. The involucre (Fig. 2, I) con- 

 sists of crowded teeth or ciha, mostly three to eight cells long, and 

 the archegonia are usually four or fewer. The "calyptra" when 

 mature measures 5 mm. or more in length and 0.9 mm. in diameter. 

 At the tip a distinct corona is developed, and the rest of the surface 

 is roughened by cells which are being thrown off. The sporophytic 

 characters are still unknown. 



There is little in common between R. Thaxteri and the other 

 -Chilean species of Riccardia. Although rivalling the three pre- 

 ceding species in complexity it is at once distinguished from R. 

 fiiegicnsi.'i by its total lack of dentate lamellae and from the other 

 two by its perfectly smooth surface, the bounding walls of the 

 outside layer being flat or nearly so. In fact the thallus is wholly 

 destitute of appendicular organs except for the slime papillae, the 

 rhizoids and the minute dentations or crenulations of the wings. 



5. Riccardia crispa (Schiffn. & Gottsche) comb. nov. 



Pseudoucura crispa Schiffn. & Gottsche in Schiffner, V., For- 



schungsreise "Gazelle" 4-^: 41. pi. 8, 14, 15. 1890. 

 Ancura umbrosa Schiffn. & Gottsche, op. cii. 42. pi. 8, f. 10, 11. 



1890. 

 Ancura crispa StQ\)h. Hedwigia32: 137. 1893. 

 Ancura cndiviae folia Goebel, Organographie, 279, /. i/d. 1898. 



Specimens examined: Tuesday Bay, Straits of Magellan, 

 1876, Nanmann (S., Y., type of Pseudoneura crispa, and S, tv'pe 

 of Aneura umbrosa) ; without definite locality, Tierra del Fuego, 

 1896-97, Hatcher (9, p. 410) ; Puerto Angusto, Desolation Island, 

 1896, Duscn iji (N. Y., as A. cndiviae folia) ; Island Harbor, 

 1868, Cunningham (M.) ; Port Gallant, LccJilcr (M.) ; southern 

 Chile, Spencer (M.) ; Otway Harbor, Gulf of Penas, Challenger 

 Expedition fM., as A. polyclada) ; Albert Bay. Coppinger (M.). 



The following additional records in the literature for A. crispa 

 may be cited : Newton and Guaitecas Islands and Alolineux Sound, 

 Duscn (28, p. 18) ; Clarence Island, Racovitza (30, p. 4) ; Huafo. 

 Guaitecas, Hale and Atalaya Islands, Canal Inocentes and Canal 

 Jeronimo, Skottsbcrg (32, p. 6, 7, and 22, p. 36, 38, etc.). 



It is difficult to determine the habit of this distinctive species 

 from the material available. It presents every appearance, how- 



