324 ALLAN HANCOCK PACIFIC EXPEDITIONS VOL. 3 



angular; apical margins multilobate, the lobes often appearing truncate; 

 growth from apical margins without a terminal cell ; tetraspores in small 

 sori, scattered through middle and upper portions of the frond; cysto- 

 carps unknown. 



Type: D. 181, dredged in 22-44 meters, Puerto Refugio, Jan. 28, 

 1940. Herb. AHF no. 59. 



Similar to Myriogramme minuta Kylin (1924, p. 56, figs. 44-45) 

 but tetraspores not confined to apical segments. M. carnea (Rodr.) Kylin 

 is another close relative from which it may be distinguished by the absence 

 of the marginal denticulations, the rounded rather than angular axils, 

 and by the shorter, more compact-appearing segments. 



Genus TAENIOMA J. Agardh 

 Taenioma perpusillum J. Ag. 



J. Agardh, 1863, p. 1257; Okamura, Icones Jap. Alg. VI, p. 26, pi. 264, 

 figs. 17-19. 



This species has recently been collected both in the Gulf of California 

 and in the Galapagos Archipelago. It was described from the west coast 

 of Mexico, being among Liebmann's original collections from St. Augus- 

 tine. Its habit and morphology are so distinctive that it can scarcely be 

 confused with any other alga. 



D. 325, lower littoral, Gonzaga Bay, Jan.; D. 392, Tepoca Bay, 

 Feb.; D. 406b, Pond Island, Feb. ; D. 540a, Agua Verde Bay, Feb. 



Family Dasyaceae 



Genus DASYA C. Agardh 

 Dasya pedicellata C. Ag. 



C. Agardh, 1824, p. 211 ; Taylor, 1937, p. 355, pi. 54, f^gs. 1-4. Dasya 

 elegans, Kiitzing, Tab. Phyc. XIV, tab. 59; as D. elegans gen- 

 erally. 

 Several specimens are on hand of an attractive sublittoral Dasya 

 which seems best referred to the above species in our present limited 

 knowledge of the Mexican plants. Dasya pedicellata has been reported 

 in subtropical waters in widespread parts of the world — Mediterranean, 

 Japan, eastern United States, West Indies, etc. Our plants conform 

 rather well with the available figures of this species, especially with the 

 fine ones of Taylor (loc. cit.). Minute study and comparison of fresh 

 material with other species of this genus may, however, modify the status 

 of the Gulf plants. 



