NO. 1 TAYLOR: PACIFIC MARINE ALGAE 283 



This very beautiful species, secured in some quantity and in full re- 

 productive condition, appears by its lack of veins and the cystocarp struc- 

 ture, where a forking system of gonimoblasts arising from the placenta 

 bears the large carpospores at the branch tips, to belong to the genus 

 Nitophyllum in the restricted sense. The carpogenic branches, however, 

 could not be studied. There seems to be no difficulty in recognizing it as 

 distinct from the three species retained in the genus by Kylin (1924, p. 

 75). Of the California Nitophylla described by Nott (1900, p. 1) only 

 N. spectabile approaches it in characters, but that species has narrower, 

 more tapered lobes and, since Kylin removes it to Myriogramme, prob- 

 ably has entirely different cystocarp structure from what has been ob- 

 served in the present material. 



Ecuador: Archipielago de Colon, dredged off Academy Bay, I. 

 Santa Cruz, no. 34-314 (tetrasporic), 34-318A (tetrasporic and sexual 

 plants, TYPE), 20 Jan. 1934. 



Nitophyllum (?) divaricatum n. sp.^'^^ 

 Plate 88, Fig. 1 



Plants to 25 cm tall (or perhaps much more), foliaceous, from a 

 branched holdfast an ill-defined stalk 1-2 cm in length supporting the 

 broad dull red blades ; blades deeply cut into a few wide tapering divari- 

 cate segments, with age becoming very irregular, the margins undulate 

 and often fimbriate with small linear to lanceolate proliferations 1-5 mm 

 long; growth at first from an apical cell which segments transversely, but 

 as the blade broadens numerous such cells appear along the margin and 

 the division is less regular; intercalary divisions present; 3-4 cells in thick- 

 ness in the median region ; macroscopic veins absent, although the central 

 area near the base is somewhat thickened ; microscopic veins vaguely rec- 

 ognizable in the younger portions; tetrasporangia in very small sori 0.1- 

 0.5 mm diam., scattered in abundance over the middle portion of the 

 blade, but generally absent from a marginal area 1.0-1.5 cm wide. 



It does not seem practicable to indicate the segregated genus to which 

 this material should be assigned, in the absence of cystocarps. Conse- 

 quently, it is placed in Nitophyllum in the old, inclusive sense, not in the 

 restricted one of Kylin. Certain fragments secured indicate that the lobes 

 may become far broader than appears from the few intact specimens, per- 

 ils Nitophyllum divaricatum n. sp. — Planta altitudine maior 25 cm, haptero 

 ramoso, stipite male definito, laminis latis profunde incisis in segmentis paucis, 

 latis, attenuatis divaricatisque, veteribus irregularibus, marginibus undulatis, saepe 

 fimbriatis proliferationes parvas habentibus; lamina media in regione 3-4 cellu- 

 larum crassitudine; venis inconspicuis microscopicisque, solis in portionibus luni- 

 oribus; tetrasporangiis in soris plurimis dispersisque, 0.1-0.5 mm diam., in 

 portionibus marginalibus laminarum non repertis. Planta typica in loco dicto I. 

 Santa Cruz, Ecuador, legit W. R. Taylor no. 34-307, 20 Jan. 1934. 



