108 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 12 



41, pi. 99, figs. la, lb) ; in the figures given by Kiitzing rather suggest 

 fragments of the present species, particularly his figure of D. anceps. 

 However, the present writer sees little similarity between the figures given 

 by Gain (1912, p. 39, pi. 5, figs. 2-6) for D. anceps and those given by 

 Kiitzing (loc. cit.), though they are supposed to represent the same species 

 and Gain reports having seen the typical material, which was in the Kiitz- 

 ing herbarium. J. G. Agardh (1848, p. 168) gives the width of D. anceps 

 as a line, which De Toni converts as 2 mm, but D. tropica in the lower 

 and older portions is much wider. 



Ecuador : Archipielago de Colon, dredged at sta. 167 from 27 meters 

 off Post Office Bay, I. Santa Maria, no. 34-277, 19 Jan. 1934. Ibid.. 

 dredged at sta. 192 from 14-18 meters, no. 34-354, 27 Jan. 1934. Ibid., 

 dredged at 60 meters' depth, no. 34-388 (TYPE), 29 Jan. 1934. 



Desmarestia herbacea (Turner) Lamouroux 



Setchell & Gardner 1925, p. 566, pi. 87; Smith 1944, p. 121, pi. 17, 

 fig. 2. 



Mexico: Baja California, rare near low tide line in South Bay, I. 

 Cerros, no. 34-627, 10 Mar. 1934. 



Desmarestia munda Setchell & Gardner 



Setchell & Gardner 1925, p. 567, pi. 89; Smith 1944, p. 121, pi. 17, 



fig. 1. 



Ecuador: Archipielago de Colon, dredged in some quantity at sta. 

 169 off Academy Bay, I. Santa Cruz, no. 34-311, 20 Jan. 1934. 



Lammariaceae 



Plants usually large at maturity, generally with a branching fibrous 

 holdfast, distinct slender stalk and broad blades of various forms bearing 

 sporangia and paraphyses in more or less widely expanded sori ; gameto- 

 phyte microscopic, filamentous, oogamous. 



KEY TO GENERA 



1. Very large, slenderly and repeatedly branched, the branches bear- 

 ing lanceolate leaves with aculeate-serrate margins and a petiolar 

 vesicle at the base of each leaf ; growth from the terminal blade, 

 the lateral leaves being developed from the meristem at its base, 

 and splitting off laterally from it Macrocystis 



