310 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL.3 



ment; tetraspores and C3^stocarps unknown; color purplish brown (Ridge- 

 way's Taupe Brown) when dry. 



Type: D. & R. 3135 (Field Museum), on rocks below low-tide 

 level, shore of island at entrance to harbor, Guaymas, Dec. 2, 1939. 



The hollow nature of the frond, nonseptate and bearing the longitu- 

 dinal filament-zone, seems to place it in Lomentaria, though we have no 

 reproductive structures as yet to verify this. In cross section this species is 

 especially distinct. The palisade of veiy small cells has not been observed 

 or found reported in any other Lomentaria. 



Genus CHAMPIA Desvaux 

 Ghampia parvula (Ag.) Harv. 



Setch. & Gard., 1930, p. 153. Chylocladia parvula Harvey, 1846-1851, 

 pi. 210. Lomentaria parvula Kiitzing, Tab. Phyc. XV, tab. 87. 



Setchell and Gardner (1930) identify a few fragments under H. L. 

 Mason 74 from Clarion Island, Revillagigedo group, as Champia parvula. 

 They say, "it seems to belong to this species attributed to the Atlantic 

 Ocean, the Mediterranean Sea, the East Indies, and Japan." The present 

 collections add new records to the occurrence of this species in the Pacific 

 region. 



D. 475a, dredged in 30-36 meters, Ensenada de San Francisco, near 

 Guaymas, Feb.; D. 704, at low tide on reef at Turner's Island, July; 

 H. 608c, dredged in 40 meters off San Jose del Cabo, Aug. 



Champia disticha sp. nov. 

 Plate 46, Fig. 5 



Frondes epiphyticae, 0.5-1.5 cm. altae, e adhesione parva, rhizinoide, 600-1100 

 ]i latae, cavae, ad diaphragmata tantum leviter constrictae, compressae usque ad 

 % plo diam. ; segmentis quam curtioribus quam latis; ramis distichis e marginibus 

 orientibus, per occasionem adhaesiones accessorias rhizinoides producentibus. 



Plants epiphytic, .5-1.5 cm. high from a small rhizoidal holdfast; 

 fronds 600-1100 ju, broad, hollow throughout, with regular diaphragms 

 and only slight constriction, compressed to 1/4 the breadth of the frond, 

 with segments much shorter than broad; branches almost entirely distich- 

 ous from the margins of the flattened frond, short, acute, occasionally 

 producing accessory rhizoidal attachments, not much constricted at their 

 bases; segments composed of a one-layered cortex of angular, somewhat 

 elongated cells and the typical inner, cortically attached filament series 

 with gland cells; cystocarps and tetrasporangia unknown. 



