304 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 3 



Genus RHODOGLOSSUM J. Agardh 



Rhodoglossum Hancockii sp. nov. 



Plate 71, Fig. 1 



Frondes 10-16 cm. altae, 5-8 (12) cm. latis, membranaceae, plus minusve di- 

 chotomo-divisae ; segmentis latissimis, divergentibus, apicibus acutis, quibusque 

 inferne ad stipitem, angustam, basi teretem, 1-1.5 cm. longam, 1 mm. latam, attenu- 

 atis, 1-paucis e stipite commune orientibus; marginibus integribus; laminis 200- 

 300 \i crassis. 



Fronds 10-16 cm. high, membranous, 5-8 (or 12) cm. broad, -\ 



dichotomously divided, the segments very broad, spreading and with acute 

 apices, narrowing abruptly at the base to a narrow, basally terete, cuneate 

 stipe 11.5 cm. long, 1 mm. diam., one to several such stipitate blades from 

 a short, common stipe; margins essentially smooth, entire; blades 200- 

 300 ju, thick, of a loose, fibrous medulla and a cortex of 3-5 layers of mi- 

 nute, -\ isodiametrical cells with conspicuous intercellular connec- 

 tions, 5-7 /i, diam., those of the outermost layer commonly somewhat anti- 

 clinally elongated; tetrasporic sori and cystocarps scattered evenly over 

 all but the tips of their respective fronds; cystocarps completely em- 

 bedded, 500-900 jx diam.; tetrasporangia in sori 500-700 fi across, com- 

 pletely immersed under the cortex, cruciately divided. 



Type : D. 437, lower littoral rocks, San Esteban Island, Feb. 5, 

 1940. Herb. AHF no. 45. 



This species was found in only one locality but was quite abundant 

 there. It was first taken for a small Iridophycus species, but investigation 

 has shown it to have the characters of the genus Rhodoglossum. 



Family Rhodymeniaceae 



Genus FAUGHEA Montagne & Bory 

 Fauchea mollis Howe 



Howe, 1911, p. 507, pi. 32, pi. 33, fig. 6. 



Study of the type specimen collected at La Paz by Vives confirms 

 Howe's designation of the plant as most likely a Fauchea. The structure 

 corresponds to Kylin's diagnosis of the genus (1931, p. 8). It has not, 

 however, appeared in any collections since the original one. 



Fauchea SeflFeri Howe 



Howe, 1911,p. 506, pi. 31. 



This plant, another species from Vives' collections at La Paz, cor- 

 responds with Kylin's interpretation of the genus Fauchea (1931, p. 8). 

 It has not been collected a second time. 



